Examine the following graph of the quadratic function f(x)=−18(x+1)2+8 and the linear function, g(x)=−67x−6. For which of the following intervals is the average rate of change of f(x) faster than the average rate of change of g(x)? There is more than one correct answer. Select all correct answers.

A. −1≤x≤3
B. 4≤x≤9
C. 1≤x≤8
D. −4≤x≤7
E. −9≤x≤2
F. 2≤x≤6

C. π(2ft)²(10ft) + 1/3π(2ft)²(13ft-10ft)

Step-by-step explanation:

Given:

diameter = 4ft

length of the cylindrical part = 10ft

entire length of the silo = 13ft

Find the volume of the silo = volume of cylinder and volume of the cone

Formulas:

Volume of cylinder: πr²h

Volume of come: 1/3πr²h

2ft= radius

height =10

volume π×2²×10

radius 2ft

height 13-10=3ft

Volume= 1/3×π×2²×3 cube feet

Therefore the third answer is correct: C. π(2ft)²(10ft) + 1/3π(2ft)²(13ft-10ft)