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dietrich_harmon

  • 3 years ago

If an object is dropped from a height of 144 feet, the function h(t)=-16t2t+144 gives the height of the object after t seconds. When will the object hit the ground? A. 9 s B. 6 s C. 1.5 s D. 3 s

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  1. Mr.Me
    • 3 years ago
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    what it the position fundtion what is -162t2 ? do you mean \[-16t ^{2}+t\]

  2. dietrich_harmon
    • 3 years ago
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  3. Mr.Me
    • 3 years ago
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    ok set it equal to zero and solve for t.

  4. dietrich_harmon
    • 3 years ago
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    check it @Mr.Me

  5. Mr.Me
    • 3 years ago
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    -16t^2+144=0 16t^2=-144 t^2=9 ...

  6. Mr.Me
    • 3 years ago
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    so t=+- 3 but -3 doesn't make sense so t=3s is good answer

  7. dietrich_harmon
    • 3 years ago
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    so is it A or D

  8. Mr.Me
    • 3 years ago
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    d because t^2=9 and t=3

  9. dietrich_harmon
    • 3 years ago
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    okay thanks

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