Question

Evaluate C = 2 r, for r = 8.

Answer 1

C = 16

Explanation:

Substitute r = 8 into the equation for C, hence

C = 2r = 2 × 8 = 16

Answer 2

C=16

Explanation:

If I cunderstand your question I think the equation is

`C=2r`

If we sub 8 in for r, we get

`2 *8=C`