8. An astronaut, Is doing an experiment in a new planet He throws a rock from the top of a 20-foot-high hill at a speed of 12 feet per second. The rock's height above ground can be modeled by the equation h(t) =-4t2+8t + 20 a. How long does the rock take to reach the maximum height? b. What is the maximum height of the rock? How long does the rock take to reach the height of 8 feet? C.

8. An astronaut, Is doing an experiment in a new planet He throws a rock from the top of a 20-foot-high hill at a speed of 12 feet per second. The rock's height above ground can be modeled by the equation h(t) =-4t2+8t + 20 a. How long does the rock take to reach the maximum height? b. What is the maximum height of the rock? How long does the rock take to reach the height of 8 feet? C.

Elementary Algebra

17th Edition

ISBN:9780998625713

Author:Lynn Marecek, MaryAnne Anthony-Smith

Publisher:Lynn Marecek, MaryAnne Anthony-Smith

Chapter10: Quadratic Equations

Section10.5: Graphing Quadratic Equations

Problem 10.108TI: A toy rocket shot upward from the ground at a rate of 208 ft/sec has the quadratic equation of...

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