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If an object is dropped from a height of 144 feet, the function h(t)= 16t^2+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
 11 months ago
 11 months ago
If an object is dropped from a height of 144 feet, the function h(t)= 16t^2+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
 11 months ago
 11 months ago

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whpalmer4Best ResponseYou've already chosen the best response.1
well, solve the equation for h = 0...what positive value of t makes it so?
 11 months ago

whpalmer4Best ResponseYou've already chosen the best response.1
at t = 0, h(0) = 16(0)^2 + 144 = 144 feet, which is the height from which it is being dropped. at some later t, h(t) = 0, and that's when it hits the ground.
 11 months ago

whpalmer4Best ResponseYou've already chosen the best response.1
\[h(t) = 0 = 16t^2+144\]\[16t^2=144\]\[t=\]
 11 months ago

whpalmer4Best ResponseYou've already chosen the best response.1
always, always check your answers in the original formula to make sure they correctly answer the question.
 11 months ago

whpalmer4Best ResponseYou've already chosen the best response.1
16(3)(3) = 144, so that is a reasonable answer. Note that t = 3 also satisfies the equation, but does not satisfy the conditions described in the problem, so it is not a correct solution here.
 11 months ago
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