Acircular plate has circumference 29.5 inches. what is the area of this plate? use 3.14 for pi.

The circumference is given by the formula:

C = 2 pi r

In this case, we are provided with C, but not r, so we must make r the subject

29.5 = 2 x 3.14 x r

Divide by 2 x 3.14 to get r by itself

r = 4.69745 (don't round off yet!)

Now that we found r, let's use the formula for the area of a circle,

A = pi r^2
= 3.14 x (4.69745...)^2
= 69.3 in^2 (1 dp)

Hope this helped!