~20 points~ During archery practice, Paula shoots an arrow into the air such that its height at any time, t, is given by the
function h(t) = -16t2+kt+ 5.

a) If the maximum height of the arrow occurs at time t = 3.5 seconds, what is the value of k?

b) Evaluate h(4).

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)