Intermediate Algebra (6th Edition)

Published by Pearson
ISBN 10: 0321785045
ISBN 13: 978-0-32178-504-6

Chapter 5 - Section 5.3 - Polynomials and Polynomial Functions - Exercise Set: 83f

Answer

19 seconds

Work Step by Step

We are given that the height of a projectile at any time t can be described by the polynomial function $P(t)=-16t^{2}+300t$. In order to find how long before an object will hit the ground, we must find the value of t such that $P(t)=0$. $0=-16t^{2}+300t$ Add $16t^{2}$ to both sides. $16t^{2}=300t$ Divide both sides by t. $16t=300$ Divide both sides by 16. $t=18.75\approx19$ seconds
Update this answer!

You can help us out by revising, improving and updating this answer.

Update this answer

After 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.