Answer:
64ft
Explanation:
d = distance from the Earth/ft
t = time falling/s
d ∝ t²
d = kt²
d = 16 and t = 4:
16 = k(4)²
16 = 16k
k = ¹⁶/₁₆
k = 1
d = t²
t = 8:
d = (8)²
d = 64
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