A new 125 g alloy of brass at 100°C is dropped into 76 g of water at 25 °C. The final temperature of the water and brass is 35 °C, what is the specific heat of the sample of brass? The specific heat of water = 4.184 J/g. °C
Answer:
The specific heat of the brass can be calculated using the formula:
Q = mcΔT
where Q is the heat transferred, m is the mass of the brass, c is the specific heat of the brass, and ΔT is the change in temperature.
First, calculate the heat transferred from the brass to the water:
Qbrass = mcΔT = (125 g)(c)(100 °C - 35 °C) = 9375c J
Next, calculate the heat transferred from the water to the brass:
Qwater = mcΔT = (76 g)(4.184 J/g. °C)(35 °C - 25 °C) = 3191.84 J
Since the heat lost by the brass is equal to the heat gained by the water:
Qbrass = Qwater
9375c J = 3191.84 J
c = 0.34 J/g. °C
Therefore, the specific heat of the brass is 0.34 J/g. °C.
Step-by-step explanation:
Write the function in terms of unit step functions. Find the Laplace transform of the given function.f(t) =0, 0 ≤ t < 1t2, t ≥ 1
The Laplace transform of the given function f(t) is [tex]L{f(t)} = (2/s^3) ~e^{-s}[/tex]
We have,
The given function can be represented in terms of unit step functions as follows:
f(t) = 0 for 0 ≤ t < 1
f(t) = t² for t ≥ 1
Using the unit step function u(t), we can express f(t) as:
f(t) = 0 x u(t) + t² x u(t - 1)
Apply the linearity property of the Laplace transforms and use the Laplace transform of the unit step function u(t-a), which is [tex]1/s ~e^{-as}:[/tex]
[tex]L{f(t)} = L{0 \times u(t)} + L{t^2 ~ u(t - 1)}\\= 0 \times L{u(t)} + L{t^2} ~ L{u(t - 1)}\\= 0 + L{t^2} ~ e^{-s \times 1}\\= L{t^2} ~ e^{-s}[/tex]
Using the Laplace transform property [tex]L{t^n} = n!/s^{n+1},[/tex] where n is a positive integer,
[tex]L{t^2} = 2!/s^{2+1}\\= 2!/s^3\\= 2/s^3[/tex]
Therefore,
The Laplace transform of the given function f(t) is [tex]L{f(t)} = (2/s^3) ~e^{-s}[/tex]
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What is an equivalent form of 15(p+ 4) - 12(2q + 4)?
15p -24q+ 12
15p -24q+8
60p-72q
-9pq
The equivalent form of expression 15(p+ 4) - 12(2q + 4) is,
⇒ 15p - 24q + 12
We have to given that;
The value of expression is,
⇒ 15(p+ 4) - 12(2q + 4)
Now, We can simplify as;
⇒ 15(p+ 4) - 12(2q + 4)
⇒ 15p + 60 - 24q - 48
⇒ 15p - 24q + 12
Thus, The equivalent form of expression 15(p+ 4) - 12(2q + 4) is,
⇒ 15p - 24q + 12
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2. Jade is 6 years less than twice Kevin's age. 2 years ago, Jade was three times as old as kevin. How old was Jade 2 years ago? 3. Len is 2 less than 3 times Amanda's age. 3 years from now, Len will be 7 more than twice Amanda's age. How old will Amanda be 3 years from now? 4. Janna is twice as old as Faith and William is 9 years older than Faith. 3 years ago, janna was 9 less than 3 times Faith's age. How old is William now?
William is currently 15 years old.
Let's start by using algebra to solve for the ages of Jade and Kevin now. Let J be Jade's current age and K be Kevin's current age. We have:
J = 2K - 6 (Jade is 6 years less than twice Kevin's age)
J - 2 = 3(K - 2) (two years ago, Jade was three times as old as Kevin)
We can use the first equation to substitute for J in the second equation:
(2K - 6) - 2 = 3(K - 2)
Simplifying this, we get:
2K - 8 = 3K - 6
K = 2
So Kevin is currently 2 years old, and Jade is:
J = 2K - 6 = 2(2) - 6 = -2
This doesn't make sense as an age, so there may be an error in the problem statement or in our solution method.
Let's use algebra to solve for Amanda's current age, which we can call A. Then we can use that to find her age 3 years from now. We have:
L = 3A - 2 (Len is 2 less than 3 times Amanda's age)
L + 3 = 2(A + 3) + 7 (three years from now, Len will be 7 more than twice Amanda's age)
Substituting the first equation into the second, we get:
(3A - 2) + 3 = 2(A + 3) + 7
Simplifying this, we get:
A = 5
So Amanda is currently 5 years old, and her age 3 years from now will be:
A + 3 = 5 + 3 = 8
Let's use algebra to solve for Faith's current age, which we can call F. Then we can use that to find Janna's and William's ages. We have:
J = 2F (Janna is twice as old as Faith)
W = F + 9 (William is 9 years older than Faith)
J - 3 = 3(F - 3) - 9 (three years ago, Janna was 9 less than 3 times Faith's age)
Substituting the first two equations into the third, we get:
(2F) - 3 = 3(F - 3) - 9
Simplifying this, we get:
F = 6
So Faith is currently 6 years old, Janna is:
J = 2F = 2(6) = 12
and William is:
W = F + 9 = 6 + 9 = 15
Therefore, William is currently 15 years old.
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In Exercises 7-10, show that {u1, u2} or {u1, u2, u3} is an orthogonal basis for R2 or R3, respectively. Then express x as a linear combination of the U?s
To express any vector x as a linear combination of an orthogonal basis {u1, u2} or {u1, u2, u3} for R2 or R3, respectively, we can solve a system of linear equations where each equation corresponds to one component of the vector x.
To show that {u1, u2} is an orthogonal basis for R2, we need to prove that u1 and u2 are orthogonal (perpendicular) to each other and that they span the entire space of R2. In other words, any vector in R2 can be expressed as a linear combination of u1 and u2.
Similarly, to show that {u1, u2, u3} is an orthogonal basis for R3, we need to prove that u1, u2, and u3 are pairwise orthogonal and that they span the entire space of R3. Any vector in R3 can be expressed as a linear combination of u1, u2, and u3.
Once we have shown that {u1, u2} or {u1, u2, u3} is an orthogonal basis for R2 or R3, respectively, we can express any vector x in terms of the basis vectors as follows:
For R2:
x = c1u1 + c2u2, where c1 and c2 are constants.
For R3:
x = c1u1 + c2u2 + c3u3, where c1, c2, and c3 are constants.
We can find the values of c1, c2, and c3 by solving a system of linear equations, where each equation corresponds to one component of the vector x. The solution to the system will give us the coefficients that express x as a linear combination of the U.
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Two people are working in a small office selling shares in a mutual fund. Each is either on the phone or not. Suppose that salesman i is on the phone for an exponential amount of time with rate μi and then off the phone for an exponential amount of time with rate λi. Formulate a Markov chain model for this system with state space {00,01, 10, 11} (each state indicates which salesman is on the phone-e.g. 10 indicates that salesman 1 is on the phone while salesman 2 is not). Find the Q-matrix (also called the generator matrix) of the Markov chain.
The Q-matrix is,
Q = | -λ1-λ2 λ2 λ1 0 |
| μ1 -μ1-λ2 0 λ2 |
| λ1 0 -μ1-λ1 μ2 |
| 0 μ1 μ2 -μ1-μ2 |
In this problem, two salesmen are working in a small office selling shares in a mutual fund. Each salesman i is on the phone for an exponential amount of time with rate μi and then off the phone for an exponential amount of time with rate λi. We will formulate a Markov chain model for this system with state space {00, 01, 10, 11} and find the Q-matrix (generator matrix) of the Markov chain.
The state space has four possible states:
- 00: Both salesmen are off the phone
- 01: Salesman 1 is off the phone and Salesman 2 is on the phone
- 10: Salesman 1 is on the phone and Salesman 2 is off the phone
- 11: Both salesmen are on the phone
The Q-matrix (generator matrix) is a 4x4 matrix that describes the transition rates between states. We can find the Q-matrix as follows:
Q = | -λ1-λ2 λ2 λ1 0 |
| μ1 -μ1-λ2 0 λ2 |
| λ1 0 -μ1-λ1 μ2 |
| 0 μ1 μ2 -μ1-μ2 |
In this matrix, the diagonal elements are negative sums of the transition rates out of the respective state, and the off-diagonal elements represent the transition rates between states.
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How to apply the inverse of sine so that you can give your final answer of the measure of X in degrees?
In a right-angle triangle, a sine function of an angle [tex]\theta[/tex] is equal to the opposite side to [tex]\theta[/tex] divided by hypotenuse.
[tex]\text{Sin} \ \theta = \dfrac{\text{Opposite side}}{\text{Hypotenuse}}[/tex]
How do you find the inverse of a trig function?[tex]\text{y = f(x)} \rightarrow \text{x}[/tex] in the domain of f. Trigonometric functions are periodic, therefore each range value is within the limitless domain values (no breaks in between). Since trigonometric functions have no restrictions, there is no inverse.
The inverse sine function (also called arcsine) is the inverse of sine function. Since sine of an angle (sine function) is equal to ratio of opposite side and hypotenuse, thus sine inverse of same ratio will give the measure of the angle. Let’s say [tex]\theta[/tex] is the angle, then:
[tex]\text{Sin} \ \theta = \dfrac{\text{Opposite side to} \ \theta}{\text{Hypotenuse}}[/tex]
[tex]\text{Or} \ \theta = \text{Sin-}1 \ \dfrac{\text{Opposite side to}\ \theta}{\text{Hypotenuse}}[/tex]
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what time what equals -20 but also adds to -8
Answer:160
Step-by-step explanation:
multiply the expressions
MULTIPLE CHOICE QUESTION
Find 125% of 80.
100
10,000
1,000
10
The amount that represents 125% of 80 is given as follows:
100.
How to obtain the amount?The amount that represents 125% of 80 is obtained applying the proportions in the context of the problem.
The decimal multiplier for a percentage of 125% is given as follows:
125/100 = 1.25.
Hence the amount that represents 125% of 80 is obtained multiplying 80 by 1.25 as follows:
80 x 1.25 = 100.
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what did I do wrong?
The surface area of the larger cylinder is 226.2 ft².
The volume of the larger prism is 1,375.3 m³.
What is the surface area and volume of the figure?The surface area of the larger cylinder is calculated as follows;
Since the volume of the larger cylinder is given, we will find the surface area;
S.A = 2πr²
where;
r is the radius of the cylinderS.A = 2π(6 ft)²
S.A = 72π ft² = 226.2 ft²
Since the surface area of the larger prism is given, we will find the volume of the prism.
V = ¹/₃ x S.A x h
V = ¹/₃ x 294.7 m² x 14 m
V = 1,375.3 m³
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What degree of measurement is
5
8
of a circle?
Answer: 225 degree
5/8of full rotation is 225degrees
Answer:
0.625
Step-by-step explanation:
hope the his helping
Complete the following using present value. (Use the Table provided. ) (Do not round intermediate calculations. The "Rate used to the nearest tenth percent. Round the "PV factor" to 4 decimal places and final answer to the nearest cent. ) On PV Table 12. 3 Rate used PV factor used PV of amount desired at end of period Period used Length of time Rate Compounded Amount desired at end of period $ 9,800 % 4 years 6% Monthly
The present value of $9,800 at the end of 4 years with a 6% monthly compounded rate is $7,996.84.
To find the present value of $9,800 at the end of 4 years with a 6% monthly compounded rate, we need to use the present value table.
First, we need to find the monthly compounded rate. The annual interest rate is 6%, so the monthly rate is
6/12 = 0.5%
Next, we need to find the PV factor. From the present value table 12.3, the PV factor for 48 periods at 0.5% monthly rate is 0.8138.
Now, we can calculate the present value:
PV = 9,800 × 0.8138
=7,996.84
Therefore, the present value of $9,800 at the end of 4 years with a 6% monthly compounded rate is $7,996.84.
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Right triangle. Find the exact values of x and y.
Step-by-step explanation:
such a diamond or special kite is a rhombus.
especially interesting to us is that the diagonals intersect each other at their midpoints.
that means
y = 5
Pythagoras gets us x.
c² = a² + b²
c is the Hypotenuse (the side opposite of the 90° angle). in our case 13.
a and b are the 2 legs. in our case x and y.
13² = 5² + x²
169 = 25 + x²
x² = 169 - 25 = 144
x = sqrt(144) = 12
5. A bank has three different types of account in which the interest rate depends on the amount invested. The ordinary account offers a return of 6% and is available to every customer. The 'extra' account offers 7% and is available only to customers with $5000 or more to invest. The superextra' account offers 8% and is available only to customers with $20 000 or more to invest. In each case, interest is compounded annually and is added to the investment at the end of the year. A person saves $4000 at the beginning of each year for 25 years. Calculate the total amount saved at the end of 25 years on the assumption that the money is transferred to a higher-interest account at the earliest opportunity.
Assuming that the person transfers their savings to the highest available account as soon as they reach the required minimum amount, the total amount saved at the end of 25 years can be calculated as follows:
Step:1. For the first year, the person saves $4000 in the ordinary account and earns 6% interest, resulting in a total of $4240.
Step:2 In the second year, the person has $8240 and can transfer it to the 'extra' account to earn a higher interest rate of 7%. After one year, they will have $8816.80. Step:3. In the third year, the person has $12816.80 and can transfer it to the 'superextra' account to earn the highest interest rate of 8%. After one year, they will have $13856.22.
Step:4. For the remaining 22 years, the person continues to save $4000 at the beginning of each year and transfers their savings to the 'superextra' account to earn 8% interest. At the end of 25 years, they will have a total of $227,217.97.
Therefore, the total amount saved at the end of 25 years, assuming that the money is transferred to a higher-interest account at the earliest opportunity, is $227,217.97.
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Vanessa bought 2.67 pounds of pasta salad at the deli. Charlie bought 1.65 pounds of pasta salad. how much more pasta salad Vanessa buy than Charlie?
Answer: 1.02
Step-by-step explanation:
2.67 - 1.65 = 1.02
A new cholesterol medication has been manufactured and a study is being
conducted to determine whether its effectiveness depends on dose. When 25
milligrams of the medication was administered to a simple random sample (SRS) of
50 patients, 17 of them demonstrated a lower cholesterol level. When 65 milligrams
of the medication was administered to another SRS of 40 patients, 10 of them
demonstrated a lower cholesterol level. Which of the following test statistics is an
appropriate hypothesis test?
The statistics that is the most appropriate is option 2 from the image I added. [tex]Z = \frac{0.34 - 0.25}{\sqrt{\frac{0.3(1 - 0.3)}{50}+\frac{0.3(1 - 0.3)}{40} } }[/tex]
How to find the appropriate statisticsWe have to find the proportion 1
= 17 / 50
= 0.34
Then we find the proportion 2
= 10 / 40
= 0.25
the proprotion = 17 + 10 / 50 + 40
= 27 / 90
= 0.3
Then the value of n1 = 50 and the value of n2 = 40
If we are to find the test statistics
The formula that we would use after inputting the values would be given as
[tex]Z = \frac{P1 - P2}{\sqrt{p(1 - p)\frac{1}{n1}+\frac{1}{n2} } }[/tex]
We will have
[tex]Z = \frac{0.34 - 0.25}{\sqrt{0.3(1 - 0.3)\frac{1}{50}+\frac{1}{40} } }[/tex]
When we expand we will have
[tex]Z = \frac{0.34 - 0.25}{\sqrt{\frac{0.3(1 - 0.3)}{50}+\frac{0.3(1 - 0.3)}{40} } }[/tex]
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The point (3, 4) lies on a circle centered at (0, 0). At what two points does the circle intersect the x-axis?
The circle intersects the x-axis at the points (-5, 0) and (5, 0).
We have,
Using the Pythagorean theorem to find the radius of the circle.
So,
r = √(0-3)² + (0-4)²
r = √(9+16)
= √25
= 5
The equation of the circle is x² + y² = 5² = 25.
To find the points where the circle intersects the x-axis,
We substitute y = 0 in the equation of the circle and solve for x:
x² + 0² = 25
x² = 25
x = ±5
Therefore,
The circle intersects the x-axis at the points (-5, 0) and (5, 0).
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In order to solve a system by substitution, you want to...
*
get opposite coefficients for each variable in each equation.
get opposite coefficients for one set of variables in each equation.
isolate a variable in an equation and then substitute into the other equation.
put the corresponding augmented matrix into RREF (row reduced echelon form).
In order to solve a system by substitution, you want to isolate a variable in one equation and then substitute it into the other equation.
Given that;
To complete the sentence for solving the system of equation.
Now, We know that;
Once you have substituted the variable, you can solve for the remaining variable(s) and find the solution to the system.
Hence, In order to solve a system by substitution, you want to isolate a variable in one equation and then substitute it into the other equation.
Therefore, Option C is true.
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card is dealt from complete deck of fifty two playing cards (no jokers)_ Use probability rules (when appropriate) to find the probability that the card is as stated: (Count an ace as high: Enter your answers as fractions:) (a) above jack 3/13 below 2/13 (c) both above jack and below 13/52 either above jack or below 5/13
The probabilities are: (a) 12/13 (b) 1/13 (c) 0 (d) 1 7/26. (a) The probability of drawing a card above a jack is 48/52 or 12/13. This is because there are 48 cards above a jack and 52 total cards in the deck.
(b) The probability of drawing a card below a 2 is 4/52 or 1/13. This is because there are only 4 cards (A, K, Q, J) that are above a 2, and there are 52 total cards in the deck.
(c) To find the probability that a card is both above a jack and below a 2, we need to find the number of cards that satisfy both conditions. There are no cards that satisfy both conditions, so the probability is 0/52 or 0.
(d) To find the probability that a card is either above a jack or below a 5, we need to find the number of cards that satisfy either condition. There are 48 cards above a jack and 20 cards below a 5 (A, 2, 3, 4), but we need to subtract the overlap (cards that are both above a jack and below a 5), which is only 2 (A and 2). So the total number of cards that satisfy either condition is 48 + 20 - 2 = 66. The probability is then 66/52 or 33/26, which simplifies to 1 7/26.
In summary, the probabilities are:
(a) 12/13
(b) 1/13
(c) 0
(d) 1 7/26
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Please guys I need help bad it's dew tomorrow
Answer: The answer is A (40 m)
Step-by-step explanation:
6. Gomer has a super-jumbo-sized drip coffee maker. The beverage is produced as hot water filters
through a cone-shaped vessel containing coffee grounds. The cone has a height of 3 inches and diameter
of one foot. Assuming that the cone is filled with water, and the water is dripping out at a rate of 10 cu.
in. per minute, how long will it take for all of the water to pass through? HELPPP
It will take time of 33.93 minutes for all of the water to pass through the cone.
To find the volume of the cone-shaped vessel, we need to use the formula for the volume of a cone:
V = (1/3) x pi x r² x h
V = (1/3) x 3.14 x 6^2 x 3
= 339.29 cubic inches
This is the total volume of water that needs to pass through the cone.
If water is dripping out at a rate of 10 cubic inches per minute, we can use the formula:
time = volume / rate
to find how long it will take for all of the water to pass through. Substituting the values we found, we get:
time = 339.29 / 10
=33.93 minutes
Therefore, it will take 33.93 minutes for all of the water to pass through the cone.
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For a standardized normal distribution, determine a value, say z_0, such that the following probabilities are satisfied a. P(0 < z < z_0) = 0.3849 b. P(-z_0 lessthanorequalto z < 0) = 0.37 c. P(-z_0 lessthanorequalto z lessthanorequalto z_0) = 0.92 d.P(z > z_0) = 0.095 e. P(z lessthanorequalto z_0) = 0.04 a. z_0 = (Round to two decimal places as needed) b. z_0 = (Round to two decimal places as needed.) c. z_0 = (Round to two decimal places as needed.) d. z_0 = (Round to two decimal places as needed) e. z_0 = (Round to two decimal places as needed).
Thus, we can write:
z_0 = -1.75.
To learn mor
(a) From the standard normal distribution table, we can see that the closest probability to 0.3849 is 0.385. The corresponding z-value for this probability is 0.25. Therefore, z_0 = 0.25.
(b) Similar to part (a), the closest probability to 0.37 is 0.3707. The corresponding z-value for this probability is -0.31 (since we want the probability for z less than 0). Therefore, z_0 = -0.31.
(c) The probability of P(-z_0 <= z <= z_0) = 0.92 represents the area under the standard normal distribution curve between -z_0 and z_0. From the standard normal distribution table, we can find the z-value that corresponds to the area of 0.46 (half of 0.92) as 1.75. Thus, we can write:
z_0 = 1.75/2 = 0.875
(d) P(z > z_0) = 0.095 represents the area under the standard normal distribution curve to the right of z_0. From the standard normal distribution table, we can find the z-value that corresponds to the area of 0.905 (1-0.095) as 1.645. Thus, we can write:
z_0 = 1.645
(e) P(z <= z_0) = 0.04 represents the area under the standard normal distribution curve to the left of z_0. From the standard normal distribution table, we can find the z-value that corresponds to the area of 0.04 as -1.75 (since we want the z-value to be negative). Thus, we can write:
z_0 = -1.75.
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Q1 ***Open Data1 Population average for social conservatism is M=5.40 Effect size for the variable of social conservatism is d = 0.4 2) Is your data normally distributed? Report. 4p
We need additional information, such as a dataset or summary statistics to perform a normality test.
To determine if the data is normally distributed, we need to look at the distribution of the variable of interest. In this case, we are interested in the distribution of social conservatism scores.
If we have access to the data, we can use statistical tests such as the Shapiro-Wilk test or the Kolmogorov-Smirnov test to determine if the data is normally distributed. However, since we only have information about the population average and effect size, we cannot directly test for normality.
However, based on the central limit theorem, we can assume that if the sample size is large enough (typically >30), the distribution of the variable of interest will be approximately normal. In this case, since we do not have information about the sample size, we cannot definitively say if the data is normally distributed.
In summary, without more information about the sample size or access to the data, we cannot determine if the data is normally distributed.
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Rosa likes to calculate the sum of the digits she sees on her digital clock (for example, if the clock says 21:17, Rosa gets 11). What is the maximum amount that can be obtained?
Answer:
19
Step-by-step explanation:
The maximum amount of the sum of digits that can be obtained from a digital clock is 27.
To see why, note that the maximum value for the hour digits is 23 (since the clock uses a 24-hour format). The sum of digits in 23 is 2+3=5.
For the minute digits, the maximum value is 59. The sum of digits in 59 is 5+9=14.
Adding the two sums of digits together, we get:
5 + 14 = 19
Therefore, 19 is the maximum sum of digits that can be obtained from the hour and minute digits on a digital clock
Statistics from the Port Authority of New York and New Jersey show that 80% of the vehicles using the Lincoln Tunne that connects Now York City and New Jersey use ZPass to pay the toll rather than stopping at a toll booth: Twelve cars are randomiy ected: Click here for the Excel Data File How many of the 12 vehicle would You expect - use E-ZPass? (Round your answer to decimal places ) Numoer vehickus What the mode of the distribution? What probability associated with the mode? (Round your answer to declmal places } HIcbe Probabilit of the sampled vehicles use E-ZPass? (Round your answer to decimal places ) probability four more What E Orcnabilih
We can find that this probability is 0.99994, rounded to five decimal places.
Based on the given statistic, we know that 80% of vehicles using the Lincoln Tunnel use E-ZPass. Therefore, we can expect that out of the 12 randomly selected vehicles, 80% or 0.8 * 12 = 9.6 vehicles would use E-ZPass. Rounding to the nearest whole number, we would expect 10 of the 12 vehicles to use E-ZPass.
The mode of the distribution is 10, as this is the most frequently occurring value in the sample.
Since 10 out of 12 vehicles is the mode, the probability associated with the mode is the proportion of vehicles that use E-ZPass in the sample. Therefore, the probability associated with the mode is 10/12 or 0.833, rounded to three decimal places.
The probability of four or more vehicles using E-ZPass can be calculated using the binomial distribution. The probability of a single vehicle using E-ZPass is 0.8, and the probability of a single vehicle not using E-ZPass is 0.2. The probability of four or more vehicles using E-ZPass is the sum of the probabilities of selecting 4, 5, 6, 7, 8, 9, 10, 11, or 12 vehicles that use E-ZPass. Using Excel or a calculator, we can find that this probability is 0.99994, rounded to five decimal places.
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CAN SOMEONE HELP ME FIND THE SURFACE AREA
Answer:
Step-by-step explanation:
roland received a score of 70 on a test for which the mean score was 65.5. Roland has learned that Z-score for his test 0.6. What is the standard deviation for this set of test scores?
If Roland has Z-score for his test 0.6, the standard deviation for this set of test scores is 7.5
To find the standard deviation for this set of test scores, we can use the z-score formula:
Z-score = (X - μ) / σ
Where:
- Z-score is 0.6 (given)
- X is Roland's score of 70
- μ is the mean score of 65.5
- σ is the standard deviation we need to find
Now we can plug in the values and solve for σ:
0.6 = (70 - 65.5) / σ
Next, we can rearrange the equation to solve for σ:
σ = (70 - 65.5) / 0.6
Finally, calculate the standard deviation:
σ = 4.5 / 0.6
σ ≈ 7.5
The standard deviation for this set of test scores is approximately 7.5.
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Let p be the population proportion for the following condition. Find the point estimates for p and q. A study of 4374 adults from country A, 2903 think mainstream media is more interested in making money than in telling the truth.
The point estimates for p and q are 0.6636 and 0.3364 respectively, where p is the population proportion for the condition.
To find the point estimates for p and q, you will need to consider the given information about the population proportion, follow the given steps:
1. The total number of adults in the study is 4374.
2. Out of these, 2903 adults think mainstream media is more interested in making money than in telling the truth.
3. To find the point estimate for p (the proportion of adults who think mainstream media is more interested in making money), divide the number of adults who think this way by the total number of adults in the study:
p = 2903/4374 = 0.6636 (rounded to four decimal places)
4. Now, to find the point estimate for q (the proportion of adults who do not think mainstream media is more interested in making money), subtract p from 1:
q = 1 - p = 1 - 0.6636 = 0.3364 (rounded to four decimal places)
So, the point estimates for p and q are 0.6636 and 0.3364, respectively.
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A spinner with repeated colors numbered from 1 to 8 is shown. Sections 1 and 8 are purple. Sections 2 and 3 are yellow. Sections 4, 5, and 6 are blue. Section 7 is orange.
A spinner divided into eight equal colored sections, with one orange, two purple, two yellow, and three blue.
Which statement about probability is true?
The probability of landing on orange is greater than the probability of landing on purple.
The probability of landing on yellow is less than the probability of landing on blue.
The probability of landing on orange is equal to the probability of landing on yellow.
The probability of landing on purple is equal to the probability of landing on blue.
The statement about probability that is true is option The probability of landing on orange is equal to the probability of landing on yellow.
What is the probability?From the question, the spinner has:
8 sections, with:
1 orange section2 purple sections2 yellow sections3 blue sections.So probability of one getting on any section is = 1/8, or 0.125.
Therefore, the probability of getting on orange will still be the same as the probability of landing on yellow and as such option C is correct.
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Find the volume of this object.
Use 3 for T.
Volume of a Cylinder
V= πr²h
Volume of a Sphere
V= = πr³
2in
4in
3in
V≈ [?]in³
Enter
The volume of the object is 52in³
How to determine the volumeThe formula for the calculating the volume of the cylinder is expressed as;
V = πr²h
Given that the parameters are;
V is the volume of the cylinder.r is the radius of the cylinder.h is the height of the cylinder.Substitute the values
Volume = 3 × 2² × 3
Multiply the values
Volume = 36 in³
The volume of a sphere is;
Volume = 4/3 ×3 × 2²
Multiply the values
Volume = 16 in³
Total volume = 16 + 36 = 52in³
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