Northeastern Pennsylvania is known for its large supply of coal. Based on this fact, what can you infer about how Northeastern Pennsylvania's land might have looked like millions of years ago?
A
The land was likely once near a volcano that deposited the coal on the land after thousands of years of eruptions.

B
The land was likely heavily forested with many smaller plants like ferns.

C
The land was likely once under water.

D
The land was likely a desert.

Aballoon is rising vertically upwards at a velocity of 10m/s. when it is at a height of 45m from the ground, a parachute bails out from it. after 3s he opens his parachute and decelerates ata a constant rate 5m/s.when. (a) what was the height of the parachutist above the ground when he opened his parachute? (b)how far is the parachutist from the balloon at t=3s? (c)with what velocity does the parachutist hit the ground? (d)after how long does the parachutist hit the ground after his exist from the balloon?