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Intermediate Algebra – Student Workbook – Second Edition 2013

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Lesson 5a - Introduction to Quadratic Functions<br />

Practice Problems<br />

5. The function h(t) = -0.2t 2 + 1.3t + 15, where h(t) is height in feet, models the height of an<br />

“angry bird” shot into the sky as a function of time (seconds).<br />

a) How high above the ground was the bird when it was launched?<br />

b) After how many seconds does the bird reach its highest point?<br />

c) How high is the angry bird at its highest point?<br />

d) After how many seconds does the angry bird hit the ground?<br />

e) If the bird is traveling at 15 feet per second, how far does the angry bird travel before it<br />

hit the ground?<br />

f) What is the practical domain of this function?<br />

g) What is the practical range of this function?<br />

Scottsdale Community College Page 201 <strong>Intermediate</strong> <strong>Algebra</strong>

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