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Q. What is the magnitude of the apparent weight of a 78kg astronaut 5200km from the center of the Earth's moon in a space vehicle moving at constant velocity?

Q. The height of a rocket t seconds after it is launched is h(t)=-16t^2 + 1000t.

A) How many seconds after launch before the rocket hits the ground?

B) After how many seconds will the height be 400 feet?

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