Answer:
36 feet
Step-by-step explanation:
Given

Required
Determine the maximum height attained
First, calculate the time to reach maximum height;
In a quadratic equation;

The maximum is:

So, we have:

Where

So:





The maximum height is at: 
So, we have:



It’s D.) 2n-8 hope this helps
Answer:
f(x) = -x³ + 3x² + 4x - 12
Step-by-step explanation:
f(x)=(x+2)(-x+3)(x-2)
Step 1. Use the difference of two squares
(x + 2)(x - 2) = x² - 4
f(x) = (-x + 3)(x² - 4)
Step 2. Long multiplication
x² - 4
<u>-x + 3 </u>
-x³ + 4x
<u> + 3x² - 12</u>
-x³ + 3x² + 4x - 12
f(x) = -x³ + 3x² + 4x - 12