A ball is thrown into the air by a baby alien on a planet in the system of Alpha Centauri with a velocity of 47 ft/s. Its height in feet after t seconds is given by y = 477 - 12t2.
a.) Find the average velocity for the time period beginning when to= 2 second and lasting for the given time.
t=.01 sec:
t=.005 sec:
t = .002 sec :
t = .001 sec:
b.) Estimate the instanteneous velocity when t = 2.

Circle a has a diameter of 7 inches, a circumference of 21.98 inches, and an area of 38.465 square inches. the diameter of circle b is 6 inches, the circumference is 18.84 inches, and the area is 28.26 square inches. part a: using the formula for circumference, solve for the value of pi for each circle. (4 points) part b: use the formula for area and solve for the value of pi for each circle. (4 points)