f a rock is thrown upward on the planet Mars with a velocity of 7 m/s, its height in meters t seconds later is given by y = 7t − 1.86t^2. (Round your answers to two decimal places.)

Question

Estimate the instantaneous velocity when t = 1.

Answer 1

the velocity is dy/dt = 7 - 3.72t

plug in the value of t=1