Answer
$25.1\ ft^2.$
Work Step by Step
The are of the hemisphere (half of a sphere) is
$A=\frac{1}{2}\times 4 \pi (2)^2=25.13\ ft^2\approx 25.1\ ft^2.$
Elementary Technical Mathematics
by Nelson, Robert; Eren, Dale;
Published by
Brooks Cole
ISBN 10:
1285199197
ISBN 13:
978-1-28519-919-1
Chapter 12 - Section 12.10 - Spheres - Exercise - Page 438: 8
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