When does the object strike the ground

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Reference no: EM131470459

An object is projected directly upward from the ground. It's distance in feet from the ground in the seconds is s=128t - 16t^2.

(a) After how many seconds will the object be 240 feet from the ground?

(b) When does the object strike the ground? (Use ascending order)

Reference no: EM131470459

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