(40 points) asap i need this done soon!

A.  8 ft

B. 660 times

Step-by-step explanation:

A.  Finding the circumference:

The formula for the circumference is

    C = πD         where D is the diameter

We are given D = 2.5, and to use π = 3.14, so plug those values in...

   C = π(2.5) = (2.5)(3.14)

            C = 7.85, which rounds to 8   (the nearest whole number)

B.  How many times will it rotate in one mile.

Divide 5,280 by 8 to see how many times the tire will rotate (each time it rotates once the tire travels 8 ft)

5,280/8 = 660

Step-by-step explanation:

first step= the formula for a circle is

A=πr2 (a= pi r squared)

use 3.14 for every circle problem to help you solve it.

So,

3.14 (2.5) use the radius then add the 3.14 (2.5)2 (squared)

Squared means times it by that number, not two. for example.; if I were to square 3.14, I would do 3.13 times 3.14. not 3.14 times 2.

so do 2.5 times 2.5 and you should get 6.25.

Next write 3.14 (6.25) and times 3.14 by 6.25 and you should get the answer of 19.625.

I'm not sure how to round it to the nearest whole number, But i'm sure you can just google it. I hope this helped!

9) i can't see the angle so whatever it is just do this: cos(angle) x hypotenuse and then use that answer and they hypotenuse and plug it into this: (answer you just got)^2 + b^2 = (hypotenuse)^2. the first answer will be the answer of the adjacent side and the second answer after this equation will be the opposite side.

10) y = 14 x = √147 or 12.12435565

11) x = 4.8

12) x = 4.2

13) x = 9.3

14) pq: 13.2

qr : 17.6

angle p: 53º

15) angle c: 54.3º

angle a: 35.7º

16) h = 21040

v = 1841

step-by-step explanation:

10) 7/sin(30) = 14 = y

7^2 + b^2 = 14^2

49 + b^2 = 196

b^2 = 196 - 49

√b^2 = √147

x = √147

11) cos(70) x 14 = 4.788282007

x = 4.8

12) tan(25) x 9 = 4.196768923

x = 4.2

13) sin(31) x 18 = 9.270685348

x = 9.3

14) pq: sin(37) x 22 = 13.23993051

pq: 13.2

qr: cos(37) x 22 = 17.56998122

qr : 17.6

angle p: 180 - (37 + 90) = 53º

15) cos-1(7/12) = 54.31466529

angle c: 54.3º

angle a: 180 - (90 + 54.31466529) = 35.68533471

angle a: 35.7º

16) 4 x 5280 = 21120

cos(5) x 21120

h = 21039.63202

h = 21040

sin(5) x 21120

v = 1840.729287

v = 1841

(3x-8) or (3x+8)

step-by-step explanation: