The position of an object moving along a line is given by the function s(t) = -5t² + 15t. Find the average velocity of the object over the following intervals.
(a) [1, 5]
(b) [1, 4]
(c) [1, 3]
(d) [1, 1 + h] where h > 0 is any real number.
(a) The average velocity of the object over the interval [1, 5] is
(b) The average velocity of the object over the interval [1, 4] is
(c) The average velocity of the object over the interval [1, 3] is
(d) The average velocity of the object over the interval [1, 1 + h] is