The distribution of the ages of of all IRSC students is known to be normally distributed with a mean of 20.9
years and a standard deviation of 5.9 years. Use this information to determine the following probabilities.
Round solutions to four decimal places, if necessary.
Answers
The probability that a random sample of 55 students has a mean age of less than 19.2 age years is 0.3866 and the probability that a random sample of 55 students has a mean age between 18.8 and 23 years is 0.27808.
What is the probability that a random sample has a mean age of less than 19.2a. To find P(x < 19.2), we need to find the area under the normal distribution curve to the left of x = 19.2. We can use the formula for z-score to standardize the value of x:
z = (x - μ) / δ = (19.2 - 20.9) / 5.9 = -0.2881
Looking up the area to the left of z = -0.2881 in a standard normal distribution table or using a calculator, we find that the probability is approximately 0.3869. So P(x < 19.2) is 0.3866.
b. To find P(18.8 < x < 23.0), we need to find the area under the normal distribution curve between x = 18.8 and x = 23.0. Again, we can standardize the values of x and use a standard normal distribution table or calculator:
z1 = (18.8 - 20.9) / 5.9 = -0.3559
z2 = (23.0 - 20.9) / 5.9 = 0.3559
Looking up the area between z1 = -0.3559 and z2 = 0.3559 in a standard normal distribution table or using a calculator, we find that the probability is approximately0.27808. So P(18.8 < x < 23.0) is 0.27808.
Learn more on probability here;
https://brainly.com/question/23286309
#SPJ1
Related Questions
Please help!! Will mark branliest
Answers
The real and imaginary values of w is 86 and - 0.92i respectively.
What is the real and imaginary values of w
To find w = √(3 - 4i), we can use the following steps:
Step 1: Find the modulus and argument of z = 3 - 4i
The modulus of z is
|z| = √(3² + (-4)²)
= √(9 + 16) = √25
= 5.
The argument of z is arg(z) = arctan(-4/3) ≈ -0.93 radians (or about -53.13 degrees).
Step 2: Find the principal square root of the modulus of z, which is
√|z| = √5.
Step 3: Find the argument of w, which is half of the argument of z, i.e., arg(w) = arg(z)/2
= -0.93/2
≈ -0.465 radians (or about -26.57 degrees).
Step 4: Express w in terms of its real and imaginary parts, using the formula:
w = √|z| * exp(i*arg(w)).
Substituting the values we found above, we get:
w = √5 x exp(i(-0.465))
= √5 x (cos(-0.465) + i*sin(-0.465))
≈ 1.86 - 0.92i
Learn more about real and imaginary values here: https://brainly.com/question/5564133
#SPJ1
How many 3 digit numbers can be formed using numerals in the set 3,2,7, and 9 if repetition is not allowed?
Answers
There are 24 possible 3 digit numbers that can be formed using numerals 3,2,7 and 9 without repetition.
Since repetition is not allowed, the first digit can only be 3, 2, 7 or 9. Each of the four digits can be chosen in 4 ways.
For the second digit, the choices are now reduced to 3, 2 or 7 (since 9 has already been used). There can be 3 ways to pick the second digit.
For the third digit, the choices are now reduced to 2 or 7 (since 3 and 9 have already been used). There can be 2 ways to pick the third digit.
Therefore, there are 4 x 3 x 2 = 24 possible 3 digit numbers that can be formed using numerals 3,2,7 and 9 without repetition.
Learn more about the number here:
brainly.com/question/17429689
#SPJ2
You purchased a used car for $12,000 and have agreed to pay off
the car in 48 monthly payments of $365 each. What will be the total
sum of your payments?
Answers
Answer:
$17,520
Step-by-step explanation:
The total can be found using multiplication.
48 x 365
Use long multiplication to solve this.
After solving, you should get $17,520.
The lines represented by the equations +
the same line
O parallel
neither parallel nor perpendicular
+²1²x=4 and 3x+6y= 12 are
perpendicular
Answers
Answer:
on dividing both side of the second eqn by 6 you get
y+1/2x=2
so they are parallel to each other
[
keep in mind that:
any two equations are parallel if they have same coefficient for x and y but different constant values.
]
Answer:
slope(m1)= -coeff.of x/coeff.of y
:.m1= -1/2
slope(m2)= -coeff.of x/coeff.of y
:.m2= -1/2
so it is parallel to each other......
A spinner has three sections which are coloured red, green and blue.
Chris spun the spinner 100 times in total.
The frequency of spins that landed on green was 35.
The ratio of the frequency of red to the frequency of green was 4 : 7.
What is the estimated probability of the spinner landing on blue?
Give your answer as a decimal.
Answers
The estimated probability of the spinner landing on blue is 0. This means the spinner will not land on blue.
What is probability?Probability is the measure of how likely an event is to occur out of the number of possible outcomes. It is expressed in terms of a number between 0 and 1, where 0 means that the event is impossible and 1 means the event is certain. Probability is used to calculate the likelihood of an event or outcome in a variety of situations, from predicting the weather to playing the lottery.
The estimated probability of the spinner landing on blue can be calculated by using the ratio of the frequency of red to the frequency of green.
As the ratio is 4 : 7, the frequency of red is 4/11 of the total frequency of 100 spins. The frequency of green is 7/11 of the total frequency of 100. Therefore, the frequency of blue is 100-(4/11+7/11) which is 1 – (11/11) = 0.
Therefore, the estimated probability of the spinner landing on blue is 0. This means the spinner will not land on blue.
To calculate the estimated probability, first we need to calculate the total frequency of all the sections. This is done by adding all the frequencies of the sections together. In this case, the total frequency is 100. Then using the ratio of the frequency of red to the frequency of green, calculate the frequency of red and the frequency of green. Subtract the total frequency and the total frequency of red and green from the total frequency, to get the frequency of blue. Finally, divide the frequency of blue by the total frequency and convert it into a decimal. This will give us the estimated probability of the spinner landing on blue.
For more questions related to frequency,
https://brainly.com/question/27151918
#SPJ1
how many rational numbers are there between 0 and 5 explain ur answer in words
Answers
Answer:
4 or 5
Step-by-step explanation:
because rational numbers also include natural numbers but natural numbers starts from 1 to eternity
while whole numbers start from 0 and is also included in rational numbers so it might be 5
Solve, (x + 2) (x +3) – (x + 2) (x – 3) = 0
Answers
Answer:
The value of x is -2.
Step-by-step explanation:
(x+2) (x+3) - (x+2) (x-3) =0
Multiplying
x(x+3) +2(x+3) - [x(x-3) +2(x-3) =0
x² +3x +2x +6 -[x²-3x +2x -6] =0
Opening the bracket
x²+3x +2x +6 -x²+3x-2x+6=0
Adding the like terms
6x+12=0. [x²-x²=0]
6x = -12
x = -12 ÷6
x = -2
line bm bisects angle abc if angle mbc is 32 degrees what is the measure of anble abc
Answers
The measure of angle abc is 64 degrees.
What is the measure of angle abc?An angle bisector is simply a line or ray that divides an angle into two equal parts.
Given that;
Line bm bisects angle abc.
Angle mbc = 32 degreesAngle abc = ?First, we determine the measure of angle abm.
Since line bm bisects angle abc, it divides the angle into two equal parts.
Hence;
Angle mbc = angle abm
Angle abc = angle mbc + abm
Plug in the value
Angle abc = 32 degrees + 32 degrees
Angle abc = 64 degrees.
Therefore, 64 degrees is the measure of ∠b.
Learn more about bisectors here: https://brainly.com/question/28663444
#SPJ1
Please answer
Determine the common difference of the arithemetic sequence in which a1=3 and a4=15
Answers
Check the picture below.
The common difference of the arithmetic sequence in which a1=3 and a4=15 is d = 4
What is an arithmetic sequence?An arithmetic sequence is a sequence of integers with its adjacent terms differing with one common difference.
If the initial term of a sequence is 'a' and the common difference is of 'd', then we have the arithmetic sequence as:
a, a + d, a + 2d, ... , a + (n+1)d, ...
Its nth term is [tex]T_n = a + (n-1)d[/tex]
(for all positive integer values of n)
And thus, the common difference is [tex]T_{n+1} - T_n[/tex]
for all positive integer values of n
Given that a1=3 and a4=15
nth term of G.P is ;
Calculation:
[tex]T_n = a + (n-1)d[/tex]
a1 = 3
a2 = 3+ d
a3 = 3+ d
a4=15
3 + 3d = 15
d =4
Learn more about arithmetic sequence here:
https://brainly.com/question/3702506
#SPJ2
The equation x + (75.3 - x) = 75.3 represents the sum of the measures
of two angles. How many possible combinations of angle measures satisfy
the equation?
Answers
Overall, there are infinitely many possible combinations of angle measures that satisfy the equation x + (75.3 - x) = 75.3.
How many possible combinations of angle measures satisfy the equation?It is true that 75.3 = 75.3 when the equation x + (75.3 - x) = 75.3 is reduced to its simplest form. This means that any value of x that falls within the range of possible angle measurements, which is 0 to 75.3 degrees, will satisfy the equation.
As a result, the number of possible combinations of angle measurements that fulfil the equation is unlimited. The particular values of each angle can vary, but each combination will consist of two angles whose measures total up to 75.3 degrees.
For instance, if the sum of the two angles is 75.3 degrees, one conceivable angle combination is 30 degrees and 45.3 degrees. The combination of 60 degrees and 15.3 degrees is another conceivable one.
Learn more about linear equation here:
brainly.com/question/11897796
#SPJ9
Which symbol will make this statement true?
|-6| ______ 2
>
<
=
Answers
Answer:
The > (Greater Than) symbol
Step-by-step explanation:
The absolute value symbol makes the value inside positive by calculating the inside's distance from 0. -6 is 6 units away from zero.
|-6| = 6, and 6 is greater than 2
1. A rectangle is 10cm long and its perimeter is 26 cm. Find the breadth of the rectangle
Answers
If a rectangle is 10cm long and its perimeter is 26 cm, then the breadth of the rectangle is 3 cm
Let's assume the breadth of the rectangle to be 'b' cm.
We know that the perimeter of a rectangle is the sum of the lengths of all four sides.
Therefore, the perimeter of the given rectangle = 2(length + breadth)
Given, the length of the rectangle = 10 cm and the perimeter = 26 cm.
So, 2(10 + b) = 26
Simplifying this equation, we get:
20 + 2b = 26
Move 20 to right hand side of the equation
2b = 26 - 20
2b = 6
b = 6/2
b = 3 cm
Learn more about rectangle here
brainly.com/question/16989027
#SPJ4
Please help asap! thanks!
Answers
Answer:
it could be either A or D
SLAP ME IF I AM WRONG!
Step-by-step explanation:
Raymond works for a pharmaceutical company that is testing the effectiveness of a new medication
Answers
The exponential function that gives the amount of medication y in the body after x hours is:
[tex]y = 400(\frac{2}{3} )^x[/tex]
What is an exponential function?
A mathematical function called an exponential function is employed frequently in everyday life. It is mostly used to compute investments, model populations, determine exponential decline or exponential growth, and so forth. When the input variable x appears as an exponent in the formula f(x) = aˣ, an exponential function is indicated. The exponential curve is influenced by both the exponential function and the value of x. A constant serves as the exponent in an exponential function, but not the other way around (if a function has a variable as the base and a constant as the exponent then it is a power function but not an exponential function).
The complete question is given below.
The initial value of the medication = 400 mg
This is the value of a.
a = 400
b is the growth or decay factor in the exponential function formula.
In this question, it is the decay factor.
b = 1-r
where r is the decay rate = 1/3
b = 1-1/3 = 2/3
The exponential function is given by the formula:
y = abˣ
[tex]y = 400(\frac{2}{3} )^x[/tex]
Therefore the exponential function that gives the amount of medication y in the body after x hours is:
[tex]y = 400(\frac{2}{3} )^x[/tex]
To learn more about the exponential function, follow the link.
https://brainly.com/question/2456547
#SPJ1
This composite figure is created by placing a sector of a circle on a triangle. What is the area of this composite figure? Use 3.14 for π. Round to the nearest hundredth. Show your work.
Answers
The area of the composite figure is 96. 522 cm²
How to determine the areaFirst, we need to know that the formula for the area of a triangle is expressed as;
Area = 1/2 × base × height
Now, substitute the values, we have;
Area = 1/2 × 6 × 8
Multiply the values
Area = 1/ 2 × 48
Divide the values
Area = 25 cm²
The area of the sector is represented as;
Area = θ/360 πr²
substitute the values
Area = 82/360 × 3.14 × 10²
Area = 71. 522 cm²
The total area of the figure = 25 + 71. 522 = 96. 522 cm²
Learn about area at: https://brainly.com/question/22972014
#SPJ1
Can someone please hand a help
Answers
The inequality -1/2 ≤ ab ≤ 1/2 implies [tex](ab)^2[/tex] ≤ 1/4, and squaring bοth sides οf the inequality gives us [tex](ab)^2[/tex] ≤ 1/4 as required.
Tο prοve that -1/2 ≤ ab ≤ 1/2 fοr [tex]a^2+b^2 = 1[/tex]and a, b ∈ ℝ, we can start by nοting that:
-1 ≤ a ≤ 1 (because [tex]a^2 \le a^2 + b^2 = 1[/tex], sο -1 ≤ a ≤ 1)
-1 ≤ b ≤ 1 (because [tex]b^2 \le a^2 + b^2 = 1[/tex], sο -1 ≤ b ≤ 1)
Multiplying these inequalities, we get:
-1 ≤ ab ≤ 1
Nοw, we need tο shοw that ab cannοt equal ±1. If ab = 1, then we have:
[tex]a^2 + b^2 = 1[/tex]
[tex]a^2 + 2ab + b^2 = 1 + 2ab[/tex]
[tex](a + b)^2 = 1 + 2ab[/tex]
Since a and b are bοth between -1 and 1, a + b is between -2 and 2, sο [tex](a + b)^2[/tex] is between 0 and 4. Therefοre, we have:
1 + 2ab ≤ 4
Simplifying, we get:
ab ≤ 3/2
This cοntradicts the fact that ab = 1, sο ab cannοt equal 1. Similarly, if ab = -1, we get:
[tex](a + b)^2 = 1 - 2ab[/tex]
Since [tex](a + b)^2[/tex] is nοnnegative, we have:
1 - 2ab ≥ 0
Simplifying, we get:
ab ≤ 1/2
This cοntradicts the fact that ab = -1, sο ab cannοt equal -1. Therefοre, we have -1 < ab < 1, which implies -1/2 ≤ ab ≤ 1/2.
Taking the square οf bοth sides οf -1/2 ≤ ab ≤ 1/2, we get:
[tex]1/4 \le a^2b^2 \le 1/4[/tex]
Adding [tex]a^2 + b^2 = 1[/tex]tο bοth sides, we get:
[tex]5/4 \le 1 + a^2b^2 \le 5/4[/tex]
Dividing by 2, we get:
[tex]5/8 \le (1 + a^2b^2)/2 \le 5/8[/tex]
Since [tex](1 + a^2b^2)/2[/tex] is the average οf [tex]a^2[/tex] and [tex]b^2[/tex], we have:
[tex]5/8 \le (a^2 + b^2)/2 \le 5/8[/tex]
Simplifying, we get:
5/8 ≤ 1/2 ≤ 5/8
Therefοre, the inequality -1/2 ≤ ab ≤ 1/2 implies [tex](ab)^2 \le 1/4[/tex], and squaring bοth sides οf the inequality gives us [tex](ab)^2 \le 1/4[/tex] as required.
Learn more about inequality
https://brainly.com/question/30228778
#SPJ1
A coat that costs $72 is marked up by 22%. What is the new price of coat
Answers
Answer:87.84$
Step-by-step explanation:
72------100%
x----------122%
x=122*72/100=87.84$
the angle of the elevation from a park bench is 778 feet from the base of the getaway arch in St. Louis Missouri is 39 degrees how tall is the getaway arch
Answers
By trignometric property, The 630 .18 feet tall is the gateway arch .
What is the definition of trigonometry?
Trigonometry is a discipline of mathematics that examines certain functions of angles and how to use them in computations. A common angle in trigonometry has six different functions. Sine, cosine, tangent, cotangent, secant, and cosecant are their respective names and acronyms (csc).
As given
The angle of elevation from a park bench 778 feet from the base of the Gateway Arch in St. Louis, Missouri is 39 degrees.
Now by using the trignometric property
tanθ = perpendicular/base
As diagram is given below .
θ = 39
tan39° = AB/CB
CB = 778 feet
tan39° = 0.81 (approx)
0.81 = AB/778
AB = 0.81 × 778
AB = 630 .18 feet
Therefore, the 630 .18 feet tall is the gateway arch .
Learn more about trignometric property
brainly.com/question/29024806
#SPJ1
Which of the fractions below is closest to zero? OA) 1/2 O B) 1/6 OC) 1/9 OD) 1/12
Answers
Answer:
1/12
Step-by-step explanation:
Lets look at all of the answers:
1/2
1/6
1/9
1/12
1/12 is closest to 0 because a higher denominator means a lower number that is closer to 0.
May I please have brainliest? I put a lot of thought and effort into my answers so I would really appreciate it. Thanks!
NEED HELP PLEASE HELP
Answers
Answer:
B. -3/2
Step-by-step explanation:
Plot the Graph, then look for the rise over run. This equation has a rise of -6, and a run of 4. so [tex]\frac{-6}{4}[/tex], or -[tex]\frac{3}{2}[/tex]
HELPPPP PLSSSSSSSSSSSSS
like help noww
including the monthly premium, how much money would an indiviall using plan 1 spend for insurance with 2 office visits in a month???
Answers
Including the monthly premium the total money spent using plan 1 spend for insurance with 2 office visits in a month is $230.
What is insurance?In a nutshell, insurance is a contract, symbolised by a policy, in which a policyholder receives financial security or compensation from an insurance firm against losses. In order to make payments to the insured more manageable, the firm combines the risks of its clients.
Insurance policies are intended to protect against the possibility of monetary losses, large and little, that may be brought on by harm to the insured or their property or by liability for harm or injury given to a third party.
From the given table we see that the value of the monthly premium for individuals is $170.
Now, the value of office visit is: $30.
There are 2 office visits thus, 2(30) = 60.
The total money spent is:
170 + 60 = 230
Hence, including the monthly premium the total money spent using plan 1 spend for insurance with 2 office visits in a month is $230.
Learn more about arithmetic operations here:
https://brainly.com/question/30553381
#SPJ9
someone pls help (13 points )
Answers
Answer:
y = 1x-5
Step-by-step explanation:
See attached worksheet.
We'll look for a line with the form y=mx+b, where m is the slope and y is the y-intercept.
Pick any two points on the line, but pick ones that are clearly on known lines so that the points are more accurate. Pick one at the x=o point, if it can be read clearly. The vaue of y at x=0 is the y-intercept.
Follow the steps in the attachement to find the equation of the line, which is
y=1x-5
Verify that $\triangle ABC\sim\triangle DEF$ . Find the scale factor of $\triangle ABC$ to $\triangle DEF$ .
$\triangle ABC:\ AB\ =\ 10,\ BC\ =\ 16,\ CA\ =\ 20$
$\triangle DEF:\ DE\ =\ 25,\ EF\ =\ 40,\ FD\ =\ 50$
Answers
So the scale factor of triangle ABC to triangle DEF is 2/5.
What is similar triangle?Similar triangles are two triangles that have the same shape, but not necessarily the same size. This means that their corresponding angles are equal, and their corresponding sides are proportional.
Here,
To verify if the two triangles are similar, we need to check if their corresponding angles are congruent and if their corresponding sides are proportional.
Checking corresponding angles:
∠A corresponds to ∠D
∠B corresponds to ∠E
∠C corresponds to ∠F
Checking corresponding sides:
AB/DE = 10/25 = 2/5
BC/EF = 16/40 = 2/5
CA/FD = 20/50 = 2/5
Since the corresponding angles are congruent and the corresponding sides are proportional, we can conclude that triangle ABC is similar to triangle DEF. To find the scale factor of triangle ABC to triangle DEF, we can take any corresponding side and divide it by the corresponding side of the other triangle. For example:
AB/DE = 2/5
To know more about similar triangle,
https://brainly.com/question/14926756
#SPJ1
The following system of equations is designed to determine concentrations (the c's in g / (m ^ 3) ) in a series of coupled reactors as a function of the amount of mass input to each rector (right hand sides in g / d * ay ):
10c_{1} + 2c_{2} - c_{3} = 27
- 3c_{1} - 6c_{2} + 2c_{3} = - 61. 5
c_{1} + c_{2} + 5c_{3} = - 21. 5
Solve this problem with the Jacobi's iterative method to epsilon_{s} =5\%
Answers
After caculating, a) Matrix is given below, b) C₁ = 65460/193,C₂ = 48480/193, C₃ = 64460/193, c)The mass input to reactor 3 is reduced by 40g/day and d) Change of concentration is Δ C₃ = 2950/193
To solve the system of equations, we can use Gaussian elimination or any other suitable method. Here, we will use Gaussian elimination:
Given:
15C₁-2C₂-C₃=4000
-3C₁+18C₂-6C₃=1500
-4C₁-C₂+12C₃=2400
Therefore:
[tex]A=\left[\begin{array}{ccc}15&-3&-1\\-3&18&-6\\-4&-1&12\end{array}\right][/tex][tex]B=\left[\begin{array}{ccc}4000\\1500\\2400\end{array}\right][/tex]
a) The inverse matrix of A would be
[tex]A^-^1\left[\begin{array}{ccc}14/193&37/2895&12/965\\4/193&176/2895&31/965\\5/193&9/965&87/965\end{array}\right][/tex]
b) For solution of [C] = [A^-1][B]
[tex]C=\left[\begin{array}{ccc}C1\\C2\\C3\end{array}\right] =\left[\begin{array}{ccc}14/193&37/2895&12/965\\4/193&176/2895&31/965\\5/193&9/965&87/965\end{array}\right] \\[/tex]
C₁ = 65460/193
C₂ = 48480/193
C₃ = 64460/193
c) For increasing the concentration [C₁] by 10
C₁ = 65460/193 +10
=67390/193
Now again,
[tex]\left[\begin{array}{ccc}15&-3&-1\\-3&18&-6\\-4&-1&12\end{array}\right] \left[\begin{array}{ccc}67390/193\\48480/193\\64460/193\end{array}\right] =\left[\begin{array}{ccc}4150\\1470\\2360\end{array}\right][/tex]
So from the calculation= 2360 -2400= -40
Therefore the mass input to reactor 3 is reduced by 40g/day
d) Now again reducing mass input
[tex]B=\left[\begin{array}{ccc}4000-500\\1500-250\\2400\end{array}\right] = \left[\begin{array}{ccc}3500\\1250\\2400\end{array}\right] \\\\C=\left[\begin{array}{ccc}C1\\C2\\C3\end{array}\right] = \left[\begin{array}{ccc}173530/579\\130640/579\\61510/193\end{array}\right][/tex]
Δ C₃=C₃-C₃’
=64460-61510/193
= 2950/193
Δ C₃ = 2950/193
Therefore that is the change of concentration.
To learn more about Matrix Click here:
brainly.com/question/28180105
#SPJ4
PLS HELP ASAP!
in a circle with radius 7, an angle measuring 5pi/4 radians intercepts an arc. find the length of the arc in simplest form.
Answers
The length of the intercepted arc is (35 - 14√2 ) units.
what is length?
Length is a physical quantity that describes the distance between two points. It is typically measured in units such as meters, centimeters, inches, or feet. In mathematics, length can refer to the size of a geometric object,
In the given question,
We know that the length of an arc of a circle is given by the formula L = r*theta, where r is the radius of the circle and theta is the angle in radians subtended by the arc at the center of the circle.
Here, the radius of the circle is 7 units and the angle subtended by the arc is 5π/4 radians. Therefore, the length of the intercepted arc is:
L = 7*(5π/4) = (35π/4) units.
To express the answer in simplest form, we need to rationalize the denominator. Multiplying both the numerator and denominator by 2√2, we get:
L = (35π/4)(2√2/2√2)
= (35*π*√2)/(8) units.
Finally, simplifying this expression, we get:
L = (35 - 14√2) units.
Therefore, the length of the intercepted arc is (35 - 14√2) units
To know more about length and arc , visit:
https://brainly.com/question/16403495
#SPJ1
There are 4,028 cell phones in a box. 1% of them were broken. 50% of the good phones were sold to another city and the remaining were sold locally. What percent of the phones were sold locally? Round to the nearest one percent.
Answers
If 1% of the phones were broken, then the number of good phones is 99% of 4,028:
99/100 x 4,028 = 3,987.72 (rounded to 3,988)
Out of the 3,988 good phones, 50% were sold to another city:
50/100 x 3,988 = 1,994
So, the remaining number of good phones that were sold locally is:
3,988 - 1,994 = 1,994
To find the percentage of phones sold locally, we need to divide the number of phones sold locally by the total number of phones:
1,994 / 4,028 = 0.494
Then, we can convert this decimal to a percentage and round to the nearest one percent:
0.494 x 100 ≈ 49%
Therefore, approximately 49% of the phones were sold locally.
Use the remainder theorem....
Answers
Write a vertical motion model in the form h(t)=-16t^2+v0^2+h0 for each situation presented. For each situation, determine how long, in seconds, it takes the thrown object to reach maximum height.
Initial velocity: 120 ft/s; initial height: 50 ft
Answers
Answer:
-16t^2 + 120t + 50
Step-by-step explanation:
Using the given values, we can write the model for this situation as:
h(t) = -16t^2 + 120t + 50
To determine how long it takes the thrown object to reach maximum height, we need to find the time at which the object reaches its maximum height. The maximum height occurs at the vertex of the parabolic path, which is given by:
t = -b / 2a
where a = -16, b = 120.
Substituting these values, we get:
t = -120 / 2(-16) = 3.75 seconds
Therefore, it takes 3.75 seconds for the thrown object to reach maximum height.
The measure of ∠N is (15x +47) °. If x=8, find the measure of∠N, then classify the angle
Answers
So 167 degrees it’s an obtuse angle
Find a quadratic function with vertex (3 -4) and passes through
the point (0,4).
Answers
f(x) = (8/9)(x-3)² - 4 which has a vertex at (3,-4) and passes through the point (0,4).
What is a quadratic equation?
A quadratic equation is a second-degree polynomial equation of the form:
ax² + bx + c = 0
where a, b, and c are constants, and x is the variable. Quadratic equations can have one, two, or zero real solutions, depending on the values of the constants a, b, and c. The solutions can be found using the quadratic formula:
x = (-b ± [tex]\sqrt{b^2 - 4ac}[/tex]) / 2a or by factoring the quadratic expression into two linear factors.
A quadratic function can be expressed in the form:
[tex]$$f(x) = a(x-h)^2 + k$$[/tex]
where (h,k) is the vertex of the parabola.
From the problem, we have the vertex (h,k) = (3,-4). Substituting these values into the equation gives:
[tex]$$f(x) = a(x-3)^2 - 4$$[/tex]
To find the value of a, we use the fact that the function passes through the point (0,4). Substituting x=0 and y=4 into the equation gives:
[tex]$$4 = a(0-3)^2 - 4$$[/tex]
Simplifying and solving for a, we get:
a=8/9
Therefore, the quadratic function is:
f(x) = (8/9)(x-3)² - 4
which has a vertex at (3,-4) and passes through the point (0,4).
To know more about quadratic equations visit:
brainly.com/question/30098550
#SPJ1