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Tabbiejack
Group Title
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
 one year ago
 one year ago
Tabbiejack Group Title
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
 one year ago
 one year ago

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whpalmer4 Group TitleBest ResponseYou've already chosen the best response.1
well, solve the equation for h = 0...what positive value of t makes it so?
 one year ago

whpalmer4 Group TitleBest 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.
 one year ago

whpalmer4 Group TitleBest ResponseYou've already chosen the best response.1
\[h(t) = 0 = 16t^2+144\]\[16t^2=144\]\[t=\]
 one year ago

Tabbiejack Group TitleBest ResponseYou've already chosen the best response.0
so it 9
 one year ago

whpalmer4 Group TitleBest ResponseYou've already chosen the best response.1
does 16*9*9 = 144?
 one year ago

whpalmer4 Group TitleBest 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.
 one year ago

passive13 Group TitleBest ResponseYou've already chosen the best response.0
it is 3 gj
 one year ago

whpalmer4 Group TitleBest 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.
 one year ago
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