Question

The circumference of a circle is 15. Use the formula C=2 pi r to find the radius, r. Use 3.14 as an approximation for pi, and round your answer to the nearest hundredth.
a.
r = 5.21
c.
r = 4.78
b.
r = 2.39
d.
r = 3.17

Answer 1

Since C = 15 and pi = 3.14, so

15 = 2(3.14)(r)
15 = 6.28r
Divide both sides by 6.28 so as to isolate r, you get
r = 2.39

Answer 2

You're welcome.

Answer 3

thank you lol(:

Answer 4

welcome.