2 times 8 x 12
192
2 times 5 x 8
80
2 times 12 x 5
60
192+80+60=332 ft^2
8 x 1 = 8
8 x 1/2 = 4
8+4 =12
therefore, 8 x 1 1/2 = 12
Well when you convert fractions to decimals, you simply divide the numerator by the dominator.
To convert decimals to percents, you take the fraction and divide the numerator by the dominator and times that by 100.
For example, 4/25*100=16%
It's c 18, because the diameter is the longest chord so it would be greater than 15.