The area of a rectangle = length * width
78 = length * 13

use a calculator to find out the answer then,
3/5 because the numerator is no the same as the others<span />
Answer:
8
Step-by-step explanation:
8 *8=64
18 is the answer to the question because it would be 6x3 which is 18
Integrate <span>f ''(x) = −2 + 36x − 12x2 with respect to x:
f '(x) = -2x + (36/2)x^2 - (12/3)x^3 + c. Find c by letting x = 0 and using f(0)=8.
Then f '(0) = -2x + 18x^2 - 4x^3 + c = 18 (which was given).
Then -0 + 0 - 0 + c = 18, so c = 18 and
f '(x) = </span>-2x + 18x^2 - 4x^3 + 18.
Go through the same integration process to find f(x).