Question

use the quadratic model y= -4x^2 + 8x + 8

Answer 1

Hello!

First of all, let's rewrite the quadratic equation:

$y=-4x^2+8x+8$

To solve it, let's replace where we have x by 100, look:

$\begin{gathered} y=-4\cdot(100)^2+8\cdot(100)+8 \\ y=-4\cdot10,000+800+8 \\ y=-40,000+808 \\ \boxed{y=-39,192} \end{gathered}$

Answer:

y= -39,192