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iren [92.7K]
3 years ago
8

A density curve of all the possible ages between 0 years and 25 years is in the shape of a triangle. What is the height of the t

riangle?
Mathematics
1 answer:
Bad White [126]3 years ago
3 0

Answer:

Step-by-step explanation:

Note that the area under a probability density curve must be 1.

The formula for the area of a triangle is A = (1/2)(base)(height).

Here the base is 25 units.  Thus, A = 1 unit^2 = (1/2)(25 units)(height), or, after multiplying both sides of this equation by 2:

2 units^2  = ( 25 units)(height)

                             2 units^2

Then (height) = --------------------- = 0.08 unit

                            25 units

The height of the triangle is 0.08 unit.

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In a circle of radius 10 cm, a sector has an area of 40 (pi) sq. cm. What is the degree measure of the arc of the sector?
Rashid [163]

Answer:

144°

Step-by-step explanation:

First, find the area of the circle, with the formula A = \pir²

Plug in 10 as the radius, and solve

A = \pir²

A = \pi(10²)

A = 100\pi

Using this, create a proportion that relates the area of the sector to the degree measure of the arc.

Let x represent the degree measure of the arc of the sector:

\frac{40\pi }{100\pi } = \frac{x}{360}

Cross multiply and solve for x:

100\pix = 14400\pi

x = 144

So, the degree measure of the sector arc is 144°

6 0
3 years ago
Read 2 more answers
Given h(x) = x^ - 2, what is the value of h(-3) ?<br><br> ^ = is exponent 2
ella [17]

Answer:

  • 1/9

Step-by-step explanation:

<u>Given</u>

  • h(x) = x^ - 2
  • h(-3) = ?

<u>Substitute x with -3</u>

  • h(-3) = (-3)^-2 = 3^-2 = 9^-1 = 1/9
3 0
3 years ago
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Find f(2x) when f(x)=3x^2+2x-2
bonufazy [111]

Answer:

C.

6 {x}^{2}  + 4x - 4

Step-by-step explanation:

2(3 {x}^{2}  + 2x - 2) \\ 6 {x}^{2}  + 4x - 4 \\

5 0
3 years ago
HELP NEEDED ASAP! Thanks :)
Arlecino [84]

Answer:

3

Step-by-step explanation:

First we must find the total boxes of pens

15 + 9 = 24

Then we can divide the total cost by the total number of boxes of pens

$72 / 24 boxes = 3

4 0
2 years ago
How much simple interest is earned on $6,000 at an interest rate of 4.52% in 4 1/2 years?
Mama L [17]

Answer:

1220.4

Step-by-step explanation:

S.I.=P×R×T÷100

=6000×4.52×4  1/2÷100

=6000×4.52×9÷2×100

=60×4.52×9÷2

=30×4.52×9

=1220.4

4 0
2 years ago
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