Thinking Mathematically (6th Edition)

Published by Pearson
ISBN 10: 0321867327
ISBN 13: 978-0-32186-732-2

Chapter 6 - Algebra: Equations and Inequalities - 6.1 Algebraic Expressions and Formulas - Exercise Set 6.1: 37

Answer

60 ft

Work Step by Step

Given h= 4+ 60t - 16$t^{2}$ To find the ball’s height 2 seconds after it was kicked Step 1: substitute the value of t=2 sec in the formula h= 4+ 60(2) - 16$(2)^{2}$ Step 2: Evaluate the exponential expressions $(2)^{2}$ = 2x2 = 4 h= 4+ 60(2) - 16(4) step 3: Multiply 60(2) = 60x2 = 120 and 16(4) = 16x4= 64 h= 4+120-64 step 4: Add and subtract from left to right h= 124-64 h= 60ft Therefore the height of ball after 2 second it was kicked is 60 ft.
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