A ball is thrown into the air by a baby alien on a planet in the system of Alpha Centauri with a velocity of ft/s. Its height in feet after seconds is given by .

a.) Find the average velocity for the time period beginning when second and lasting for the given time.

sec:
sec:
sec :
sec:

b.) Estimate the instanteneous velocity when .

Answer:

NOTE: For the above answers, you may have to enter 6 or 7 significant digits if you are using a calculator.

You can earn partial credit on this problem.