Answer
The circle has:
circumference = $8\pi$ inches
area = $16\pi$ square inches
Work Step by Step
RECALL:
(i) The circumference (C) of a circle is given by the formula $C=2\pi{r}$ where r =radius; and
(ii) The area (A) of a circle is given by the formula $A=\pi{r^2}$ where r = radius
With a radius of 4 inches, use the formulas above to have:
$C=2\pi(4) = 8\pi$ inches
$A=\pi(4^2) = 16\pi$ square inches