Question

(Will mark best answer)

Answer 1

Answer:

its A i just took the test

Answer 2

Answer:

The first option is correct.

Step-by-step explanation:

The proportion we have is

$\frac{C_1}{d_1}=\frac{C_2}{d_2}$

For the first ratio, we know that C₁ = π and d₁ = 1.  This gives us the ratio

π/1.

For the second ratio, we know that d₂ = 2r and we we do not know C₂.  This gives us

C₂/2r.

This gives us

$\frac{\pi}{1}=\frac{C_2}{2r}$

Cross multiplying, we have

2r(π) = C₂(1)

2πr = C₂