Posted by ari on .
A circular lake is 30 miles across at its widest point. What is the area of the lake in acres? Round your answer to the nearest tenth of an acre.

math 
Ms. Sue,
A = pi * r^2
A = 3.14 * 15^2
A = 706.5 square miles
1 square mile = 640 acres
706.5 * 640 = ______ acres