Area of rectangle is base times height
area of triangle is 1/2 times base times height
this shape has 3 rectangular sides and 2 triangular sides
2 sides and 1 bottom
2×(6×5)+1×(6×8) = 108
front and back triangular sides
2×(1/2)×(3×8) = 24
total is 132 cm^2, C
Answer:
9 inches of rainfall produces the maximum number of gnats.
Step-by-step explanation:
Given : 
To Find :How many inches of rainfall produces the maximum number of gnats?
Solution:

G(x) =The number of gnats in millions.
x denotes the length of rainfall
To Find the maximum length find the mid point of zeroes .Since parabolas are symmetrical, the x value of the max falls 1/2 way between the zeros.



So, x = 0 , x= 18
Now Formula of midpoint : 


Hence 9 inches of rainfall produces the maximum number of gnats.
12/4 is 3+5 to the power of -4
5 to the negative 4 power is .0005 plus 3 is 3.0005 I'm sorry if its wrong but that is my answer if I'm reading it right