if a rock is thrown upward on the planet Mars with a velocity of 10 m/s, its height in meters t seconds later is given by y=10t-1.86t2.
a.) find the average velocity for the given time intervals...
iii.) (1, 1.1)
iv.) (1, 1.101)
b.) find the instantaneous velocity when t=1.
please help and show steps to get your answer please!!!