Solve.A bookcase is to be constructed with three shelves as shown. The height of the bookcase is 4 feet longer than the length of a shelf, and only 38 feet of lumber is available. What should be the width and height of the bookcase?
A. length = 5 feet; height = 9 feet
B. length = 5 feet; height = 20 feet
C. length = 7.5 feet; height = 11.5 feet
D. length = 17 feet; height = 22.5 feet
Answer: A
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C. Increasing -? < x < 0
Decreasing 0 < x < ?
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Increasing 0 < x < ?
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