Ocean trenches are formed when
a) two oceanic plates slide past each other.
b) an oceanic plate goes under another oceanic plate.
c) two oceanic plates grind past each other along transform faults.
d) two oceanic plates hit each other causing both plates to rise up.

Astone is dropped from the upper observation deck of a tower, 250 m above the ground. (assume g = 9.8 m/s2.) (a) find the distance (in meters) of the stone above ground level at time t. h(t) = (b) how long does it take the stone to reach the ground? (round your answer to two decimal places.) s (c) with what velocity does it strike the ground? (round your answer to one decimal place.) m/s (d) if the stone is thrown downward with a speed of 2 m/s, how long does it take to reach the ground? (round your answer to two decimal places.) s