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12.4 Exercise 21

Avg difficulty 2.5

A fireworks rocket is shot upward out of a pit 12 ft below the ground at a velocity of 60 ft/sec. Its height in feet after t t seconds is given by s=−16 t 2 +60t−12. s = - 16 t^{2} + 60 t - 12. What is its instantaneous velocity after 4 seconds?

OpenStax Precalculus 2e, 12.4 Derivatives, exercise 21

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Adapted from College Algebra © 2021 Rice University. Licensed under CC BY 4.0. Sources: College Algebra 2e, Algebra and Trigonometry 2e, Precalculus 2e, College Algebra with Corequisite Support 2e. Imported at revision 4922e46.