2. You are designing a dome house in the shape of a hemisphere with a 40 ft outside diameter. Two coats of sealer are required to cover and
seal the exposed external concrete. If one gallon covers 110 ft 2, how
many gallons are required for the bill of materials?
a. 46 gallons
b. 92 gallons
C. 53 gallons
d. 43 gallons
e. 33 gallons