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Xem môn học›Algebra 1 — Semester 2
Algebra 1 · Semester 2 Michigan Standards 8A-8B
MediumCalcWord

A rocket's height is h = −5t² + 30t. Maximum height?

A30
B45
C60
D90
Explanation
📌 t = −b/(2a) = −30/(2·(−5)) = 3. h(3) = −5(9)+30(3) = −45+90 = 45

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