Homework Help: math

Posted by ari on Monday, October 8, 2012 at 8:10pm.

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, Monday, October 8, 2012 at 8:18pm
A = pi * r^2

A = 3.14 * 15^2

A = 706.5 square miles

1 square mile = 640 acres

706.5 * 640 = ______ acres

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