Answer:
r equals StartFraction C Over 2 pi EndFraction
Step-by-step explanation:
we know that
The circumference of a circle is equal to

where
r is the radius of the circle
Solve for r
That means -----> isolate the variable r
Divide by 2π both sides

Simplify right side

Rewrite

so
r equals StartFraction C Over 2 pi EndFraction
40° snnsdndnxnnxndndndnndndndndndjdjjd
Answer: the one that ends with 30. D the fourth one
Step-by-step explanation:
90 ft.......hope this helps