Answer
$104.02~ft$
Work Step by Step
Find the $y$ of the vertex, that is:
$f(-\frac{b}{2a})=f(-\frac{\frac{9}{5}}{2(-\frac{16}{2025})})=f(113.90625)$
$f(113.90625)=-\frac{16}{2025}(113.90625)^2+\frac{9}{5}(113.90625)+1.5\approx104.02$
You can help us out by revising, improving and updating this answer.
Update this answerAfter you claim an answer you’ll have 24 hours to send in a draft. An editor will review the submission and either publish your submission or provide feedback.