Given a circle with measures of (c, d, and r) and a circle with measures of (c', d', and r'), what is c if d d' = 0.25 and c' = 16?

C = 4    

Step-by-step explanation:

Given : Given a circle with measures of (C, d, and r) and a circle with measures of (C', d', and r').

and

We have to find the value of C when C' = 16

Consider, The given circle  with measures of (C, d, and r) and a circle with measures of (C', d', and r').    

Since, Circumference of circle is directly proportional to the diameter of circle.

Thus, C ∝ d

and C' ∝ d'

Given

Thus,

Simplify , we have,

C' = 16

Simplify, we get,

Thus, C = 4

the correct answer to your question is a. 4^4

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step-by-step explanation: