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6.5 Exercise 37

Avg difficulty 2.5

Dennis is going to throw his rubber band ball upward from the top of a campus building. When he throws the rubber band ball from 80 feet above the ground, the function h(t)=−16t2+64t+80h \left(t\right) = −16 t^{2} + 64 t + 80 models the height, h, of the ball above the ground as a function of time, t. Find:

ⓐ the zeros of this function which tell us when the ball hits the ground, ⓑ when the ball will be 80 feet above the ground, ⓒ the height of the ball at t=2t = 2 seconds.

OpenStax Intermediate Algebra 2e, 6.5 Polynomial Equations, exercise 37

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