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Mathematics, 22.03.2021 15:10 stef76

The height in meters, S, of a rocket 1 seconds after being launched with an upward velocity of 80 meters per second may be approximated by this equation:
S = 801 - 512
How many seconds after launch is the rocket first 140 meters above the ground?

A 5.3
B 2
C 14
D 8

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