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3 years ago

A normal distribution has a mean of 15 and a standard deviation of 2. Find the value that corresponds to the 75th

Mathematics

1 answer:

Arada [10]3 years ago

7 0

I am sorry, I am so confused
I wish I could help

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A cell phone company charges $42 per month of service. The cost of a new

Lorico [155]

Answer:

it will cost $205.99 dollars

Step-by-step explanation:

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3 years ago

A running track in the shape of an oval is shown. The ends of the track form semicircles. A running track is shown. The left and

serg [7]

Two shapes.. a circle and a rectangle. The width of the rectangle serves as the diameter of the circle.
Length = 140 m ; Width = 68 m
Circumference of a circle = 2 π r circumference of a cirlce = 2 * 3.14 * (68m/2) = 2 * 3.14 * 34 m = 213.52
length = 2 * 140 m = 280 m
perimeter of the oval = 213.52 m + 280 m = 493.52 m

8 0

3 years ago

Read 2 more answers

The sum of three consecutive numbers is 153. What is the smallest of the three numbers ?

astra-53 [7]

$n;\ n+1;\ n+2 - \text{three consecutive numbers}\\\\(n)+(n+1)+(n+2)=153\\\\n+n+1+n+2=153\\\\3n+3=153\ \ \ \ |-3\\\\3n=150\ \ \ \ |:3\\\\n=50$

Answer: 50

6 0

3 years ago

Sketch the region enclosed by y=3x and y=x^2 . Then find the area of the region.

kolezko [41]

Answer:

$A=4.5u^2$

Step-by-step explanation:

The integral of a function gives you the area under the curve, the subtraction of one of the areas from the other will give you the area in between.

The limits of integration are the points where the curves intersect each other(take the curves has a system of equation and solve for x and y):

$y=3x, y=x^2\\3x=x^2\\x^2-3x=0\\x(x-3)=0\\x_1=0\\x-3=0\\x_2=3$

$y_1=3x_1=3(0)=0\\y_2=3x_2=3(3)=9$

The integral will be the subtraction of the curve $y=3x$ and $y=x^2$ (In the graph you can see y=3x is the upper curve):

$\int\limits^3_0 {3x-x^2} \, dx =\left\frac{3x^2}{2}-\frac{x^3}{3}\right|^3_0=\frac{3(3)^2}{2}-\frac{(3)^3}{3}-\left(\frac{3(0)^2}{2}-\frac{(0)^3}{3}\right)\\\int\limits^3_0 {3x-x^2} \, dx =\frac{27}{2}-\frac{27}{3} =13.5-9=4.5u^2$

6 0

3 years ago

3.2468 rounded to the nearest tenth.<br>please help me

earnstyle [38]

Answer:

3.2

Step-by-step explanation:

Find the number in the tenth place

and look one place to the right for the rounding digit

. Round up if this number is greater than or equal to

and round down if it is less than

7 0

3 years ago