During the first nine months of the year, it rained an average of 3 inches each month.
During the last three months, it rained
a total of 21 inches. Mark beside the
number sentence used to find the average
rainfall per month .

80π/3 or about 83.775

step-by-step explanation:

since a cone is 1/3 of a cylinder, we need to find the base's area. since area = πr^2, we get 16π. then, multiplying this by 5, we get 80π. dividing by 3, since the cone's volume is 1/3 of that of a cylinder's, we get 80π/3.

hope this !

part a: 1.08

part b: 27.59

the answer is  

d.

121π mi^2

hope you got it chief