Intermediate Algebra (6th Edition)

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

Chapter 5 - Section 5.8 - Systems of Linear Equations and Problem Solving - Exercise Set - Page 324: 86

Answer

10 Seconds

Work Step by Step

h(t)=-16t^2+64t+960 factor -16(t^2-4t-60) Using ac method, find two numbers whose products are -60 and their sums are -4. The numbers are 6 and -10. t^2+6t-10t-60 t(t+6)-10(t+6) (t-10)(t+6) t+6=0 t=-6 does not make sense t-10=0 t=10 After 10 seconds the object strikes the ground.
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