## Precalculus: Mathematics for Calculus, 7th Edition

Published by Brooks Cole

# Chapter 3 - Section 3.1 - Quadratic Functions and Models - 3.1 Exercises: 51

#### Answer

maximum height $y= 25 ft$

#### Work Step by Step

Calculate the maximum of the function by substituting the values from the function into $t_{MAX}=\frac{-b}{2a}\rightarrow t_{MAX}=1.25$ which is the time the ball travels upwards. Then substitute $t=1.25$ into the function to get the maximum height.

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