Approximate to the Nearest Tenth When Necessary $47 \pi$ Square Inches $12.2 \mathrm{in}$

Multiple Choice

Approximate to the nearest tenth when necessary.
-The area of a circle is $47 \pi$ square inches. Find the radius of the circle.

A) $12.2 \mathrm{in}$ .
B) $6.9 \mathrm{in}$ .
C) $47 \mathrm{in}$ .
D) $3.9 \mathrm{in}$ .