The probability that a randomly selected battery of this kind lasts longer than 70 months is approximately 0.104(rounded off to the second decimal place).
The cumulative distribution function of an exponential distribution with a mean of 60 months is given by:
F(x) = 1 - e^(-x/60)
The probability that a randomly selected battery lasts longer than 70 months is given by:
P(X > 70) = 1 - F(70) = 1 - (1 - e^(-70/60)) = e^(-70/60) = 0.104
So, the probability that a randomly selected battery of this kind lasts longer than 70 months is approximately 0.104 (rounded off to the second decimal place).
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(a) how many paths are there from the point (0, 0) to the point (110, 111) in the plane such that each step either consists of going one unit up or one unit to the right? (b) how many paths are there from (0,0) to (210, 211), where each step consists of going one unit up or one unit to the right, and the path has to go through (110, 111)?
(a) The number of pathways in the plane from point (0, 0) to point (110, 111) when each step consists of walking one unit up or one unit to the right is known as the number of ways to go to a point in a grid using just right and up moves.
This is a classic combinatorial problem known as a binomial coefficient. The binomial coefficient C(110+111, 110) = C(221, 110) = 221!/(110!111!) is the number of ways to travel from (0, 0) to (110, 111).
(b) The number of paths from (0, 0) to (210, 111) where each step consists of walking one unit up or one unit to the right and the path must pass through (110, 111) is the product of two binomial coefficients.
First, as calculated in section 1, the number of pathways from (0, 0) to (110, 111) is C(110+111, 110) = C(221, 110). Second, there are C(210+211, 210) ways to get from (110, 111) to (210, 111). (210, 211). (421, 210). C(221, 110) * C is the total number of paths found by multiplying these two binomial coefficients (421, 210).
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The length of a rectangle is 6 less than twice its width. The perimeter is 90. Find the dimensions of the rectangle
The length of the rectangle is 20 and the width is 13.
What are the dimensions?The perimeter of a rectangle = 2(length + width)
Width = w
Length = 2w - 6
90 = 2(w + 2w - 6)
In order to determine the value of w, take the following steps:
Divide both sides of the equation by 2
90/2 = w + 2w - 6
45 = w + 2w - 6
Combine and add similar terms:
45- 6 = w + 2w
39 = 3w
Divide both sides of the equation by 3
w = 39/3
w = 13
In order to determine the length, substitute for w in the equation that represents the length.
Length = 2(13) - 6
= 26 - 6
= 20
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Scholars measured how two different class plants grew over a week. They wrote the equations below to represent the height of each plant.
● Bean plant: h = 0.25d, where h is the height in inches and d is the number of days
● Sunflower: h = 10 + 0.02d, where h is the height in inches and d is the number of days
Brie says that both plants have a proportional relationship between the height and number of days because each plant grows by the same amount each day.
Do you agree or disagree with Brie? Explain why
I disagree with Brie.
Only the bean plant has a proportional relationship. The sunflower does not have a proportional relationship.
How to determine whether to agree or disagree with Brie?In a proportional relationship, the ratio of the dependent variable (height) to the independent variable (number of days) is constant. In this case, the ratio of height to number of days is not constant for both plants.
For the bean plant, the ratio of height to number of days is 0.25, which is constant. This means that the bean plant grows by 0.25 inches per day.
For the sunflower, the ratio of height to number of days changes as the number of days increases, it starts with 10 and increases by 0.02 each day. This means that the growth rate of the sunflower is not constant, it starts with 10 and increases by 0.02 inches per day.
Thus, I disagree with Brie.
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what is the dependent variable? what is the independent variable in this study? a. calorie resctrition b. weight loss c. randomized control trial d. body composition
A dependent variable is the variable that being check in a scientific experiment.
The dependent variable is "dependent" on the other independent variable. As the experimenter alter the independent variable, the change in the dependent variable is observed and recorded. When you take data in an experiment, the dependent variable is the one being advised.
A scientist is testing the effect of light and dark on the efforts of moths by turning a light on and off. The independent variable is the amount of light and the moth's reply is the dependent variable.
A change in the independent variable (total amount of light) straight source a change in the dependent variable (moth behavior).
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suppose the probability is 0.25 that a certain athlete wins in each race. find the expected number of races until she needs to run to win a race.
Answer:
4 races
Step-by-step explanation:
Four races is expected to win
P = 0.25 = 25% = 1/4
Hope this helps
Determine if the given point is a solution of the system of inequalities.
Help please.
The inequality equations is
a) The point ( -9 , 4 ) lies on the inequality relation
b) The point ( 6 , -2 ) lies on the inequality relation
c) The point ( 0 , -4 ) does not lie on the relation
What is an Inequality Equation?Inequalities are the mathematical expressions in which both sides are not equal. In inequality, unlike in equations, we compare two values. The equal sign in between is replaced by less than (or less than or equal to), greater than (or greater than or equal to), or not equal to sign.
In an inequality, the two expressions are not necessarily equal which is indicated by the symbols: >, <, ≤ or ≥.
Given data ,
Let the inequality equation be represented as A
a)
Now , let the first point be represented as P ( -9 , 4 )
The shaded region is below 4 in the y axis and less than -4 in the x axis
So , the point ( -9 , 4 ) does lies on the inequality equation graph
b)
Now , let the first point be represented as Q ( 6 , -2 )
The shaded region is below -8 in the y axis and less than 8 and more than 4 in the x axis
So , the point ( 6 , -2 ) does lies on the inequality equation graph
c)
Now , let the first point be represented as R ( 0 , -4 )
The shaded region is above -8 in the y axis and more than -4 in the x axis and less than -1
So , the point ( 0 , -4 ) does not lie on the inequality equation graph
Hence , the inequality equations is solved
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I took a random sample of size 49 students score from their sampling distribution test. The
score was selected from the Regular Statistics class. The mean of the score of the population of
Regular statistics is 63 and standard deviation is 14. What is the probability in the sample selected will have mean score more than 65.
The probability of a sample mean more than 65 is given as follows:
0.1587 = 15.87%.
How to obtain probabilities using the normal distribution?The z-score of a measure X of a variable that has mean symbolized by [tex]\mu[/tex] and standard deviation symbolized by [tex]\sigma[/tex] is obtained by the rule presented as follows:
[tex]Z = \frac{X - \mu}{\sigma}[/tex]
The z-score represents how many standard deviations the measure X is above or below the mean of the distribution, depending if the obtained z-score is positive or negative.Using the z-score table, the p-value associated with the calculated z-score is found, and it represents the percentile of the measure X in the distribution.By the Central Limit Theorem, the sampling distribution of sample means of size n has standard deviation [tex]s = \frac{\sigma}{\sqrt{n}}[/tex].The parameters for this problem are given as follows:
[tex]\mu = 63, \sigma = 14, n = 49, s = \frac{14}{\sqrt{49}} = 2[/tex]
The probability of a sample mean above 65 is one subtracted by the p-value of Z when X = 65, hence:
[tex]Z = \frac{X - \mu}{\sigma}[/tex]
By the Central Limit Theorem
[tex]Z = \frac{X - \mu}{s}[/tex]
Z = (65 - 63)/2
Z = 1
Z = 1 has a p-value of 0.8413
1 - 0.8413 = 0.1587 = 15.87%.
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Find the inequality represented by the graph!
The inequality is y ≥ 1/2x.
How to find the calculation?We must first identify the linear equation that describes the line in the graph in order to determine the inequality it reflects.
So, using the two points (0, 0) and (2, 1), we first get the slope of the line:
m = y2 - y1 /x2 - x1 = 1-0 / 2-0 = 1/2
Now, we can determine the linear expression using one point, the slope, and the slope-point formula.
y - y1 = m( x - x1)
y - 0 = 1/2(x - 0 )
y = 1/2 x
Then, to evaluate the linear equation, we only need to select a test point from the shaded region, which will be (0,1):
y = 1/2 x
1 = 1 / 2 (0)
1 = 0
Because 1 is greater than 0 and the line is solid, we can infer that the inequality sign is in the proper position.
Therefore, the inequality is y ≥ 1/2x.
The Complete Question is inequality.
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There are 28 students in a class. Fourteen of those students are men.
What percent of the class are men ?
Answer: 50%
Step-by-step explanation:
If fourteen are men, and there are twenty-eight in the class, then the fraction that are men are -
14/28.
14/28 is 1/2 which is equal to 0.5
0.5 converted to percent is 50%
Let us assume that you started a job on 08/21/2019. You graduated on 05/20/2022. How many days have you been working at the job as a student?Group of answer choices121512879051003
I began my job as a student on 08/21/2019 and worked for a total of 905 days until my graduation on 05/20/2022. This is calculated by taking the total number of days between the start and end date - 3 years - which is 1095, and then subtracting the weekends and holidays - 190 days - during that period. This demonstrates my commitment to my job as a student.
08/21/2019 - 05/20/2022
= 3 years
= 1095 days
- 190 days (weekends and holidays)
= 905 days
Starting on 08/21/2019, I have been working at my job as a student for 905 days as of 05/20/2022. This is determined by taking the total number of days - 3 years - between the start date and end date, which is 1095 days, and then subtracting 190 days for the weekends and holidays during that period. This leaves me with 905 days of work as a student.
I began my job as a student on 08/21/2019, and my graduation was on 05/20/2022. After calculating the total number of days between the two dates - 3 years - which is 1095, and then subtracting the weekends and holidays during that period - 190 days - I have worked as a student for 905 days up until my graduation date. This demonstrates the commitment and dedication I had to my job as a student.
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Draw number line to show the following
0>x≥5
The graph of the inequality 0 > x ≥ 5 can be seen on the image at the end.
How to graph the inequality?Here we want to graph the following inequality:
0 > x ≥ 5
So, x is strictly larger than 0 and smaller than or equal to 5.
Because x = 0 is not a solution, we will draw an open circle at x = 0.
Then a line that goes to the right until x = 5, where we will draw a closed circle, because that value belongs to the solution set, then the inequality is the one you can see below.
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In the diagram below, Ray AB bisects Angle CAD. Solve for x and the measure of Angle CAD. Show all of your work.
question is on the picture
Answer:
C. √5 =2.236.
Step-by-step explanation:
it's the sq root of 2²+1² = 5.
Rectangle J'K'L'M' shown on the grid is the image of rectangle JKLM after transformation. The same transformation will be applied on trapezoid STUV.
What will be the location of T' in the image trapezoid S'T'U'V'?
answers
12,6
12,7
16,7
16,6
Point T becomes (18, 2), which equals T', when we transform STUV using the technique above.
What is meant by transformation?Four distinct approaches to modify the position and/or shape of a point, line, or geometric figure are collectively referred to as transformations. The Pre-Image of the object is its initial shape, while the Image, after transformation, is the final shape and location of the thing.
The movement of two-dimensional figures about a plane or coordinate system is described by mathematical transformations. A preimage, also known as an inverse image, is a two-dimensional shape that exists without any change. After transformation, the figure is shown in the image.
If we pay attention to the transformation, it is obvious that every point in the rectangle JKLM is changed to a point that is 13 units to the right and 3 units to the bottom.
The T in STUV is currently at (5, 5).
When we transform STUV using the formula above, point T becomes (5 + 13, 5 - 3) (18, 2), which equals T'.
Therefore, the correct answer is option b. (18, 2).
The complete question is:
Rectangle J'K'L'M' shown on the grid is the image of rectangle JKLM after transformation. The same transformation will be applied to trapezoid STUV.
What will be the location of T' in the image trapezoid S'T'U'V'?
a. (18, −2)
b. (18, 2)
c. (15, −2)
d. (15, 2)
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Simplify 4(7 - 3) + 11.
Answer:
27
Step-by-step explanation:
First do the () part which is (7-3) equal 4×4 equal 16 so then u will add 16+11 getting 27
Which inequality describes the relationship between points A and B on the number line?
A. A > B
B. B ≤ A
C. B > A
D. B = A
From the Number in the graph , the inequality that describes the relationship between points A and B on number line is (c) B > A .
In the Number Line we can see that , Both the points A and B are between 0 and 1 on the number line ,
We know that , On a number line , the further right we move the higher numerical values we get ;
On the number line the point B is further to the right , as well as closer to 1 than A , So , we can conclude that B is greater than A .
Therefore , The point B is greater than point A .
The given question is incomplete , the complete question is
Which inequality describes the relationship between points A and B on the number line ?
(a) A > B
(b) B ≤ A
(c) B > A
(d) B = A
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Adam writes a number. The number is greater than 50 and less than 54. What numbers could Adam have written?Explain
The numbers is greater than 50 and less than 54 are 51, 52 and 53.
Now, According to the question:
A number is an arithmetic value used for representing the quantity and used in making calculations. A written symbol like “3” which represents a number is known as numerals. A number system is a writing system for denoting numbers using digits or symbols in a logical manner.
Adam writes a number.
The number is greater than 50 and less than 54.
Based on the given condition:
A number is > and < .
Then,
51, 52, and 53 are all greater than 50, but less than 54
Hence, The numbers is greater than 50 and less than 54 are 51, 52 and 53.
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The inequality d < 4. 75 represents the prices d in dollars that Paige is willing to pay for popcorn. The inequality d < 8. 00 represents the prices d in dollars that Paige is willing to pay for a movie ticket. At how many theaters would Paige be willing to buy a ticket and popcorn?
At two theaters Paige would be willing to buy a ticket and popcorn.
Consider the following table that shows ticket and popcorn prices at five movie theater chains.
Here, the inequality d < 4. 75 represents the prices d in dollars that Paige is willing to pay for popcorn.
And the inequality d < 8. 00 represents the prices d in dollars that Paige is willing to pay for a movie ticket.
To find: the number of theaters that would Paige be willing to buy a ticket and popcorn
We can observe that the number of theaters that has the movie ticket price less than 8 dollars are two.
The number of theaters that has the popcorn price less than 4.75 dollars are three.
And the number of theaters that has the popcorn price less than 4.75 dollars as well as the movie ticket price less than 8 dollars are two.
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Determine the slope of a line that is perpendicular to a line with the slope 2/7
Answer:
-7/2
Step-by-step explanation:
The slopes of perpendicular lines are negative reciprocals of each other.
To find the reciprocal of a fraction, flip the fraction.
For the negative part, change the sign.
Slope of line: 2/7
Slope of perpendicular line: -7/2
Factor the expression completely. x^3 y^4 −x^4 y^4
The algebraic expression x³y⁴ - x⁴y⁴ is factorized to be x³y⁴(1 - x) using their highest common factor HCF
What is HCFThe H.C.F. defines the highest common factor present in between given two or more numbers or mathematical expression.
The two terms x³y⁴ and x⁴y⁴ of the algebraic expression x³y⁴ - x⁴y⁴ have their highest common factor to be x³y⁴ such that:
x³y⁴ × 1 = x³y⁴
x³y⁴ × x = x⁴y⁴
and
x³y⁴ - x⁴y⁴ = x³y⁴ × 1 - x³y⁴ × x
x³y⁴ - x⁴y⁴ = x³y⁴(1 - x)
Therefore, the algebraic expression x³y⁴ - x⁴y⁴ is factorized to be x³y⁴(1 - x) using their highest common factor HCF
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If a mechanic rotates the octagonal nut shown clockwise around its center, what is the angle of rotation that will moves position 5 to position 8?
The angle of rotation that will move the clockwise position of 5 to 8 is 225 degrees.
What is rotation?The circular movement of an item about a center is referred to as rotation. Different forms can be rotated by an angle about their central point. A rotation is a map in mathematics. The rotation group of a certain space is made up of all the rotations that revolve around a fixed point and form a group beneath a structure.
The given nut is in the shape of an octagon.
The total angle of a polygon is 360 degrees.
An octagon has 8 sides, so each rotation of the nut will result in an angle of:
Rotation = 360 / 8
Rotation = 45 degrees.
To move the position of 5 to 8, a total of 5 rotations are required.
Total rotation = (45)(5)
Total rotation = 225 degrees.
Hence, the angle of rotation that will move the position of 5 to 8 is 225 degrees.
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Please help
Nancy purchased a hot tub at a total price of $6995.
She made a $1200 down
payment and financed the rest at 10. 4% compounded monthly.
Nancy can repay
the loan in 36 months or 48 months.
How much interest will Nancy save is she
repays the loan in 36 months instead of 48 months?
First, we need to calculate the remaining balance after the down payment of $1200. The remaining balance is: $6995 - $1200 = $5795
To calculate the total interest for 36 months, we can use the formula:
I = P * r * t
Where:
I = total interest
P = remaining balance ($5795)
r = interest rate (10.4%/12)
t = number of months (36)
So the total interest for 36 months would be:
$5795 * (0.104/12) * 36 = $2,199.40
To calculate the total interest for 48 months, we can use the same formula but with a different value for t (48 months):
$5795 * (0.104/12) * 48 = $2,932.80
To find out how much Nancy will save by repaying the loan in 36 months instead of 48 months, we can subtract the total interest for 36 months from the total interest for 48 months:
$2,932.80 - $2,199.40 = $733.40
So, Nancy will save $733.40 in interest if she repays the loan in 36 months instead of 48 months.
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the angle of elevation from the tip of a building's shadow to the top of the building is 63 degrees and the distance is 220 feet. find the height of the building to the nearest foot
The angle of elevation from the tip of a building's shadow to the top of the building is 63⁰. The height of the building is 432 ft.
The tip of the building's shadow, the top of the building, and the base of the building form a right triangle.
Angle of elevation is the angle formed an object is placed above the observer. It is the angle between the the line of sight and the horizontal line.
If we know the angle of elevation and the distance, we can compute the height of the building using trigonometric function.
tan α = y/x
Since it is a right triangle, using the trigonometric formula
height of the building / distance = tan 63⁰
height of the building / 220 = 1.96
height of the building = 220 x 1.96 = 432 feet.
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2x - 3 y = -1 y = x - 1 Solve each system of equations. Show all your work.
x = 4, y = 3 for the given equation 2x - 3 y = -1 , y = x - 1 .
What are equations?A mathematical equation is a formula that uses the equals sign to represent the equality of two expressions. The meanings of the word equation and its cognates in various languages can vary slightly. For instance, in French, an equation is defined as having one or more variables, whereas in English, an equation is any well-formed formula that consists of two expressions linked by the equals sign.Finding the values of the variables that result in the equality is the first step in solving an equation with variables. The unknown variables are also known as the variables for which the equation must be solved, and the unknown variable values that fulfil the equality are known as the equation's solutions.Given data :
2x - 3 y = -1
y = x - 1
In a system of equations, there are multiple equations present. We actually look for the point at which these equations are identical when we attempt to solve a system of equations problem. In order to solve such an issue, we typically employ the substitution method, which involves inserting the values of one variable into the initial expression in order to determine the value of the second variable.
3y=2x+1
y= (2/3)x + 1/3 = x-1
x/3 =4/3
x = 4, y=3
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The teacher gave a true and false quiz where P(true) = 0.5 for each question. Interpret the likelihood that the first question will be true.
Likely
Unlikely
Equally likely and unlikely
This value is not possible to represent probability of a chance event.
Answer: Don't trust me on this.
Step-by-step explanation:
I want to say it will be equally unlikely and equally likley, because it's 0.5, which is half. (Tell me if im right.)
A local pizza shop has a membership program for frequent buyers. The membership costs $20 per month and members get a discounted price of $1.25 per slice of pizza. Jaya purchased a membership to this pizza shop. How much would Jaya have to pay the pizza shop if she bought 16 slices of pizza this month? What would be the monthly cost for
�
x slices of pizza?
Answer:
Step-by-step explanation:
a couple slices of pizza
how to graph
y=-1/2x + 3
y=5
Answer:
The graph would look like this
Step-by-step explanation:
Determine the solution to the inequality.
one third times the absolute value of the quantity x plus 1 end quantity is greater than or equal to 3
x ≤ −8 or x ≥ 8
x ≤ −10 or x ≤ 9
x ≤ −2 or x ≥ 2
x ≤ −10 or x ≥ 8
The solution of the inequality |x + 1| ≥ 3 is:
x ≥ 2 or x ≤ -4
How to solvethe inequality?Here we want to solve the absolute value inequality:
|x + 1| ≥ 3
The absolute value can be decomposed into two inequalities, these are:
(x + 1) ≥ 3
(x + 1) ≤ -3
Now we can solve these two inequalities to get:
x ≥ 3 - 1 = 2
x ≤ -3 - 1 = -4
Then the solution is:
x ≥ 2 or x ≤ -4
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Answer: Its D
Step-by-step explanation:
I looked up the answer
John was able to assemble 10 bicycles in 8 hours. Considering that he is consistent assembling each bicycle, how many bicycles can John assemble in 1 hour?
To find out how many bicycles John can assemble in 1 hour, you can use the formula:
rate = work/time
where rate is the number of bicycles John can assemble in 1 hour, work is the total number of bicycles he assembled, and time is the total time it took him to assemble the bicycles.
In this case, the work is 10 bicycles and the time is 8 hours. So, we can substitute these values into the formula:
rate = 10 bicycles / 8 hours
rate = 1.25 bicycles/hour
So John can assemble 1.25 bicycles in 1 hour, assuming he works at a consistent pace.
Find the area of a circle with radius, r = 7.27m. Give your answer rounded to 2 DP.
The area of a circle is given by the formula:
A = πr^2
Where A is the area of the circle, π is approximately 3.14 and r is the radius of the circle.
Given the radius, r = 7.27m, we can substitute this into the formula and calculate the area of the circle.
A = π * 7.27^2 = π * 52.5129
A = 165.9 m^2
The area of the circle is 165.9 m^2. Rounded to 2 decimal places, the area of the circle is 165.90 m^2