Pervious concrete is placed over a gravel sub base of ____ inches or more that provides a storage reservoir for rainwater, allowing it to percolate into the ground.
A. 3
B. 6
C. 9
D. 12
Answer: D
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A. ?4 in (100 mm) B. ?3 in (75 mm) C. ?2 in (50 mm) D. ?1 in (25 mm)
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What will be an ideal response?
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What will be an ideal response?
Express 440 K as a Fahrenheit scale temperature and round to the nearer tenth if necessary.
Fill in the blank(s) with the appropriate word(s).