Answer
See below
Work Step by Step
Multiplying the rate by the time gives the work done.
The friend does 3/8 because it should add up to 1 room in 5 hours.
The work rate of a friend is: $\frac{\frac{3}{8}}{5}=\frac{3}{40}$
Algebra 2 (1st Edition)
by Larson, Ron; Boswell, Laurie; Kanold, Timothy D.; Stiff, Lee
Published by
McDougal Littell
ISBN 10:
0618595414
ISBN 13:
978-0-61859-541-9
Chapter 8 Rational Functions - 8.6 Solve Rational Equations - 8.6 Exercises - Problem Solving - Page 594: 36a
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