Multiple Choice
A homeowner purchases insulation for her attic rated at R-15.She wants the attic insulated to R-30.If the insulation she purchased is 10 cm thick, what thickness does she need to use?
A) 10 cm
B) 15 cm
C) 20 cm
D) 30 cm
E) 40 cm
Correct Answer:
Verified
Correct Answer:
Verified
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