Trigonometry (10th Edition)

Published by Pearson
ISBN 10: 0321671775
ISBN 13: 978-0-32167-177-6

Chapter 8 - Complex Numbers, Polar Equations, and Parametric Equations - Section 8.6 Parametric Equations, Graphs, and Applications - 8.6 Exercises - Page 399: 39c

Answer

The projectile is in flight for approximately 2.6 seconds. The horizontal distance covered is 62.4 feet

Work Step by Step

We can find the time the projectile is in flight: $y = 24\sqrt{3}~t-16~t^2$ $24\sqrt{3}~t-16~t^2 = 0$ $(24\sqrt{3}-16~t)(t) = 0$ $t = 0$ or $(24\sqrt{3}-16~t) = 0$ $t = \frac{24\sqrt{3}}{16}$ $t = 2.6~seconds$ The projectile is in flight for approximately 2.6 seconds. We can find the horizontal distance covered: $x = 24~t$ $x = (24)(2.6)$ $x = 62.4~feet$ The horizontal distance covered is 62.4 feet
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