A roof material takeoff totals 40.8 squares before waste. With a 7 percent waste allowance, how many squares should be ordered?
Correct Answer
B) 43.66 squares.
Seven percent waste gives 40.8 x 1.07 = 43.656, rounded to 43.66 squares.
Why This Is the Correct Answer
Seven percent waste gives 40.8 x 1.07 = 43.656, rounded to 43.66 squares.
Why the Other Options Are Wrong
Option A: 42.25 squares.
42.25 squares. is below the supported result for roofing waste calculation; it likely omits allowance, conversion, coverage, or final round-up.
Option C: 44.80 squares.
44.80 squares. is above the supported result for roofing waste calculation; it likely double-counts allowance, uses the wrong unit, or rounds too early.
Option D: 46.60 squares.
46.60 squares. is above the supported result for roofing waste calculation; it likely double-counts allowance, uses the wrong unit, or rounds too early.
Memory Technique
Roofing Waste cart for Adding Roof: percent first, gives second, whole units last.
Reference Hint
Study anchor (closed-book): memorize Roofing waste calculation from CSLB B General Building Study Guide; California Building Code, Title. / CSLB B General Building Study Guide estimating concepts; know the rule or calculation trigger without relying on exam-room lookup.
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