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by ashtonkem 2132 days ago
I double checked, because I originally thought you were wrong, but it looks like you're essentially right.

32mi/s * (5280ft/mi) = 168,960 ft/s

168,960 ft/s ÷ 32.17405 ft/s^2 = 5,251.4371053691s

5,251s ÷ 60 s/min ÷ 60 min/h = 1.45hr