math
posted by dev on .
after ploting graph for h = 1.1 + 7t  5t^2 for interval t = 0 to t = 2. i catch a ball again when it is at height at 1.1m given the velocity of ball v in m/s given by v = 7  10t, find the speed of the ball when it reaches my hand.

sub t = 1.1 into
v = 7  10t