Question 212724
a ball is thrown into the air its velocity is 45ft/s its height in freet after t sec is given by 45t-19t^2. Find the instaneous velocity when t=2
------------------------------------------
If you are studying calculus, evaluate the derivative at t = 2.
---------------------
If h(t) = -19t^2+45t
then h'(t) = -38t+45
and h'(2) = -38(2)+45 = -76+45 = -31
========================================
Cheers,
Stan H.