The Answer is B, 1
X^3^6 equals X^18 which equals the other x^18, which means they equal eachother.

distribute the values you receive this. no further simplification can be done
Area = 10(pi)(16) = 160pi cubic feet
160pi = 502.56
502.56/8 = 63 minutes
6.98 divide it by 1.86= 3.75268...
(you rounded to 3.75 pounds)