Another teacher decides to average the height of all 15-year-old male students in his classes throughout the day. By the end of the day, he measured the height of 57 boys and calculated an average of 68.1 inches. The known mean height for 15-year-old boys is 67 inches, with a standard deviation of 3.19 inches. What is the percentile rank for this sample? (enter a number only, rounded to the nearest 2 decimal places)

Answers

Answer 1

Answer: 0.47

Step-by-step explanation:

0.47% = 0.0047 in decimal form. Percent means 'per 57'. So, 67Inches means 0.47 per 100 or simply 0.47/100. If you divide 0.47 by 100, you'll get 0.0047 (a decimal number).


Related Questions

a painter can paint 180 square feet in 30 minutes. how many square feet can he paint in 120 minutes?

Answers

Answer:

720

Step-by-step explanation:

jayfeather friend me

Answer:

720

Step-by-step explanation:

a rectangle has perimeter 86 cm and length 37 cm. what is its width

Answers

Answer:

6 cm

Step-by-step explanation:

37 × 2 = 74 cm86 - 74 = 12 cm12 ÷ 2 = 6 cmSo, the width is 6 cm

I hope this helps!

Answer:

The rectangle's width is 6.

Step-by-step explanation:

You are given the perimeter is 86 cm. The perimeter is the sum of all the sums. For a rectangle, use the formula, P = 2l + 2w. So, we plug the given into our equation: P = 86, l = 37. This results in:

86 = 2(37) + 2w

86 = 74 + 2w

Subtract 74 on each side.

2w = 12

Then, divide each side by 2.

w = 6

Hopefully this helped. And good luck in your studies.

What is the area? Write your answer as a fraction or as a whole or mixed number. 1 m square meters​

Answers

Answer:

The Area is all the space inside a given shape/object added together. The (assumed) Area of the problem you've given is 1 square m, since there is only 1 square m.

Step-by-step explanation:

Can someone help me it will for sure help alot someone who is confident on doing it WILL GIVE BRAINLIEST

Answers

Answer:

....................

write the algebraic expression: The difference of 5 times a number and 11 is 17

Answers

Answer:

5x - 11 = 17

Step-by-step explanation:

Answer:

5x - 11 = 17

Step-by-step explanation:

Five times a number is 5x when the number is unknown.

The difference between that number and 11 is (difference means subtract)

5x - 11

All of which = 17

5x - 11 = 17

You are not asked to solve it. Just write it.

PLEASE WILL MARK BRAINLIEST AND GIVE A LOT OF POINTS!!!! PLEASE TRY

Answers

Answer:

Because they both equal d, you can set them equal to each other:

[tex]941-12t=523+26t\\418 = 38t\\t = 11[/tex]

Substitute t = 11 into the equation 523 + 26t = d:

[tex]523 + 26 *11 = d\\523 + 286 = d\\809 = d[/tex]

There will be 809 DVDs and Blu-ray discs sold per month in 11 months.

Which geometric sequence has a common ratio of -9?
{-1, -9, 81, 729, …}
{1, -9, 81, -729, …}
{-9; -81; -729; -6,561; …}
{81; 729; 6,561; 59,049; …}

WILL GIVE BRAINLIEST!!!!

Answers

Answer:

second one

Step-by-step explanation:

just multiply by -9 and see which one fits in

Answer:

{1, -9, 81, -729, …}

Step-by-step explanation:

Geometric sequence is basically multiplying the previous number by the constant. So it is 1 x -9 = -9, -9 x -9 = 81, -81 x -9 = -729, and so on.

The sum of the measures of the interior angles of a convex polygon is 720' Classify the polygon by the number of sides.

Answers

Answer:

Since the figure with angles measuring 0˚ is 1 lines, then the figure with interior angles of 720˚ has 1+5=6 sides.

Step-by-step explanation:

Words
a. Divide the difference
between 1,200 and 700 by 5

Answers

Answer:

100

Step-by-step explanation:

1,200 - 700 = 500

500/5 = 100

Btw, uan got to, but I would really appreciate it if u marked me brainliest cuz I need one more nd I tried

A nutritional consulting company is trying to find what percentage of the population of a town is overweight. The marketing department of the company contacts by telephone 600 people from a list of the town's telephone directory. All 600 people give answers to the survey. Which of the following is the most significant source of bias in this survey?

a. Size of sample.
b. Undercoverage.
c. Voluntary response bias
d. Nonresponse.
e. Response bias.

Answers

it is undercoverage bias

i need help due tonight

Answers

Answer:

s=6

Step-by-step explanation:

3(s+4)=30

multiply 3×s and 3×4

3s+12=30

-12=-12

3s=18

divide 18 and 3s

s=6

Answer:

s=6

Step-by-step explanation:

If f(1) = 2 and f(n+1) = f(n)^2 – 3 then find the value of f(3).

Answers

Answer:

The value of f(3) = -2.

Step-by-step explanation:

First of all, let's find f(2).

[tex]f(n+1)=f(n)^{2}-3[/tex]

[tex]f(1+1)=f(1)^{2}-3[/tex]

[tex]f(2)=f(1)^{2}-3=2^{2}-3=1[/tex]

Now, we can find f(3):

[tex]f(2+1)=f(2)^{2}-3[/tex]

[tex]f(3)=f(2)^{2}-3=1^{2}-3=-2[/tex]

Therefore, the value of f(3) = -2.

I hope it helps you!

two points on a line L are (5,2) and (7,-4). what is the slope of L

Answers

Answer:

-3

Step-by-step explanation:

The slope of a line can be calculated with the formula (y2-y1)/(x2-x1)

In this case we have:

(-4-(2))/(7-5)

(-6)/(2)

-3

Let me know if this helps!

John paints blue spots on his car. He usually paints these blue spots in pairs. If the total count of blue spots is 72, how many pairs of blue spots are there?

Answers

Answer: 10 quarts of blue paint for every 2 quarts of green paint

Step-by-step explanation: The graph represents the relationship between the number of quarts of blue paint in the mix, xx and the number of quarts of yellow paint, yy.

The point (2 , 10) on the graph indicates 2 quarts of blue paint for every 10 quarts of yellow paint .

What is 5 divided by 1/8?

Answers

Answer: 50

Step-by-step explanation:

Its 40

Step-by-step explanation

Which system of equations could be graphed to solve the equation below

Answers

There isn’t an equation blow

please i need help pleasee

Answers

The answer is 1 1/3 or one and one third or 1.3 repeating :)

how many times greater is 6x10⁹ than 3x10²​

Answers

There this app called Photomath and you scan you work sheet one question at a time and it tells you the answers and the steps
It is 2x10^7 times greater.

ASAP PLS HELP WILL MARK BRAINLIEST!!

Answers

Answer:

The lines intersect at (-2,2).

Step-by-step explanation:

The line has an y intercept of 1 and a slope of -1/2 so after graphing the both of them thats where they intersect.  

The revenue equation of a company, in terms of the price of its product, is R(p) = -15p^2 + 300p + 12000.
find the revenue when the price is $10

Answers

Answer:

the answer is six thousand


1. How do you find the slope in a graph?

Answers

1. Pick two points on the line and determine their coordinates.

2. Determine the difference in y-coordinates of these two points (rise).

3. Determine the difference in x-coordinates for these two points (run).

4. Divide the difference in y-coordinates by the difference in x-coordinates (rise/run or slope).

What is the value of
the digit 9 in the
number below?
157,243

Answers

Answer:

Nine hundred

The 9 is in the hundred place. So it would stand for 9 hundred.

the 9 is in the hundreds place.

Find the average rate of speed, expressed in miles per hour (unit rate). A post office truck delivered mail on a 9-mile route in 2 hours.

please help ! D:

Answers

Answer:

4.5 miles per hour

Step-by-step explanation:

Evaluate the integral using integration by parts with the indicated choices of u and dv. (Use C for the constant of integration.) xe7x dx; u

Answers

Answer:

[tex]\displaystyle \int {xe^{7x}} \, dx = \frac{e^{7x}}{7} \bigg( x - \frac{1}{7} \bigg) + C[/tex]

General Formulas and Concepts:

Calculus

Differentiation

DerivativesDerivative Notation

Derivative Property [Multiplied Constant]:                                                           [tex]\displaystyle \frac{d}{dx} [cf(x)] = c \cdot f'(x)[/tex]

Basic Power Rule:

f(x) = cxⁿf’(x) = c·nxⁿ⁻¹

Integration

Integrals

Integration Property [Multiplied Constant]:                                                         [tex]\displaystyle \int {cf(x)} \, dx = c \int {f(x)} \, dx[/tex]

U-Substitution

Integration by Parts:                                                                                               [tex]\displaystyle \int {u} \, dv = uv - \int {v} \, du[/tex]

[IBP] LIPET: Logs, inverses, Polynomials, Exponentials, Trig

Step-by-step explanation:

Step 1: Define

Identify

[tex]\displaystyle \int {xe^{7x}} \, dx[/tex]

Step 2: Integrate Pt. 1

Identify variables for integration by parts using LIPET.

Set u:                                                                                                             [tex]\displaystyle u = x[/tex][u] Basic Power Rule:                                                                                     [tex]\displaystyle du = dx[/tex]Set dv:                                                                                                           [tex]\displaystyle dv = e^{7x} \ dx[/tex][dv] Exponential Integration [U-Substitution]:                                             [tex]\displaystyle v = \frac{e^{7x}}{7}[/tex]

Step 3: integrate Pt. 2

[Integral] Integration by Parts:                                                                      [tex]\displaystyle \int {xe^{7x}} \, dx = \frac{xe^{7x}}{7} - \int {\frac{e^{7x}}{7}} \, dx[/tex][Integral] Rewrite [Integration Property - Multiplied Constant]:                 [tex]\displaystyle \int {xe^{7x}} \, dx = \frac{xe^{7x}}{7} - \frac{1}{7} \int {e^{7x}} \, dx[/tex]

Step 4: Integrate Pt. 3

Identify variables for u-substitution.

Set u:                                                                                                             [tex]\displaystyle u = 7x[/tex][u] Basic Power Rule [Derivative Property - Multiplied Constant]:             [tex]\displaystyle du = 7 \ dx[/tex]

Step 5: Integrate Pt. 4

[Integral] Rewrite [Integration Property - Multiplied Constant]:                 [tex]\displaystyle \int {xe^{7x}} \, dx = \frac{xe^{7x}}{7} - \frac{1}{49} \int {7e^{7x}} \, dx[/tex][Integral] U-Substitution:                                                                               [tex]\displaystyle \int {xe^{7x}} \, dx = \frac{xe^{7x}}{7} - \frac{1}{49} \int {e^u} \, dx[/tex][Integral] Exponential Integration:                                                               [tex]\displaystyle \int {xe^{7x}} \, dx = \frac{xe^{7x}}{7} - \frac{e^u}{49} + C[/tex][u] Back-Substitute:                                                                                       [tex]\displaystyle \int {xe^{7x}} \, dx = \frac{xe^{7x}}{7} - \frac{e^{7x}}{49} + C[/tex]Factor:                                                                                                           [tex]\displaystyle \int {xe^{7x}} \, dx = \frac{e^{7x}}{7} \bigg( x - \frac{1}{7} \bigg) + C[/tex]

Topic: AP Calculus AB/BC (Calculus I/I + II)

Unit: Integration

20 points i will mark brainiest


Question 4

(08.03)


Solve the system of equations and choose the correct answer from the list of options.


x − y = 7

y = 3x + 12


Question 4 options:


1)


2 over 19 comma 2 over 33


2)


negative 2 over 19 comma negative 33 over 2


3)


negative 19 over 2 comma negative 33 over 2


4)


19 over 2 comma 33 over 2

Answers

Answer:

x = -9 1/2

y = -16 1/2

Step-by-step explanation:

x - y = 7

solve the above for 'y':  -y = 7 - x

multiple each side by -1:  y = x - 7

now both equations are in 'y=' form

x - 7 = 3x + 12

-2x - 7 = 12

-2x = 19

x = -19/2 or -9 1/2

-9.5 - y = 7

-y = 16.5

y = -16.5 or -16 1/2

                                       

Answer:

(-19/2, -33/2)

Step-by-step explanation:

Factor

x2 + 10x + 25

Answers

x=-5 i hope this helpsss

Answer:

(x+5)(x+5)

Step-by-step explanation:

x²+10x+25

25

/ \

+5 and +5

(x+5)(x+5)

if you dont understand. I recommend this video https://youtu.be/yBCAv_NzzPQ

at 10:21

i can’t figure out how to do this

Answers

Answer:

i need to know the answer choices

Step-by-step explanation:

Answer:

-25 is correct I think

Step-by-step explanation:

Find the polynomial of least degree in standard form with the given roots:
x = 2, 3i

Answers

Answer:

x^3 - 2x^2 + 9x - 18.

Step-by-step explanation:

The complex roots occur in conjugate pairs so there are 3 roots 2, 3i and -3i.

So we have:

P(x) = (x - 2)(x - 3i)(x + 3i)

= (x - 2)(x^2 - 9i^2)

= (x - 2)(x^2 - 9*-1)

= (x - 2)(x^2 + 9)

= x^3 + 9x - 2x^2 - 18

= x^3 - 2x^2 + 9x - 18.

help me out yall pleaseeee

Answers

opens downward. x-intercept=(-10,0),(6,0). axis of symmetry=x=-2. maximum=(-2,128)

Help please! Last questiom btw!​

Answers

Answer:

3015³

Step-by-step explanation:

Hellllloooo!

One last time why dont we.

This time we are given a cylinder to find the area of which is pretty fun ngl.

Lets take a look at the formula for a cylinder :

Volume = [tex]\pi[/tex] x r² x h

Now this may look weird cause that house thing is for sure not a number but trust me it is easy once you know what you're looking at.

So that house thing is called pi, and really it is worth 3.14 just it looks like that for some reason. But it is used to find the area of circles.

So what we are going to do is find the area of the circle which is the base of the cylinder and multiply it by the height to find the total area.

Again lets see what we are given :

Radius = 8

Height = 15

Now we plug this into the formula :

Volume = [tex]\pi[/tex] x r² x h

Volume = [tex]\pi[/tex] x 8² x 15

(don't forget your little 2 after the radius (8))

So first lets do pi x 8²

=

Which gives us roughly around 201

So now we have the surface area of the base circle of this cylinder, all we have to do is multiply by the height.

So :

201 x 15

=

3015³

(don't forget your little 3 cause its 3D)

But that is your answer.

I hope this helps!

If you have any questions or concerns comment or message me :)

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