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A sky diver falls 53 meters without friction. When the parachute is opened, it decelerates at...

A sky diver falls 53 meters without friction. When the parachute is opened, it decelerates at a pace of 1.8 m/s2 and reaches the floor with a velocity of 2.8 m/s. How much time did the sky diver remain mid air?

Gravity = 9.8 m/s2

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