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1. |
A flare is shot up into the sky modeling the formula h(t) = 2 + 144t – 16t2, where h is in feet and t is in seconds. Find the maximum height of the flare. |
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A. |
320 feet |
B. |
326 ft |
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C. |
300 ft |
D. |
350 ft |
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Hint |
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2. |
Hector needs to build a rectangular pen for his dog. He decides to use an area of 50 m2 in his backyard for the pen. Using l for the length and w for the width, express the area in terms of the two variables. |
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A. |
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B. |
l + w = 50 |
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C. |
lw = 50 |
D. |
w = 50 – w |
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Hint |
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3. |
Find the x-intercepts of the graph of
f(x) = x2 – 2x – 3. |
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A. |
–1, 4 |
B. |
–1, 3 |
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C. |
1, –4 |
D. |
1, –3 |
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Hint |
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4. |
Find the x-intercepts of the graph of f(x) = –x2 + 4x + 12. |
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A. |
2, 16 |
B. |
–2, –6 |
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C. |
–2, 6 |
D. |
–2, 16 |
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Hint |
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