At time $t = 0$, in seconds, a pair of sunglasses is dropped from the Eiffel Tower in Paris. At time $t$, its height in feet above the ground is given by $h(t) = -16t^2 + 750$.

(a) What does the function tell us about the height from which the sunglasses were dropped? Include units in your answer.
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(b) When do the sunglasses hit the ground? Include units in your answer.
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