A rocket is launched, and its height (in meters) is modeled by the equation , where t is the time in seconds. What is the maximum height the rocket reaches?
Options
A
45 m
B
60 m
C
75 m
D
90 m
Answer & Analysis
Answer
B
Analysis
The height function is .
To find the maximum height, we can complete the square.
First, factor out −5:
Complete the square:
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