Pre - Calclus! Help.

Question shown in picture.

Options:

A. 26a - 13h
B. 22a - 13h
C. 22 + 13h
D. 26a + 13h

 

Question \/

If an object is dropped from a building, then the distance it has fallen after " t " seconds is given by the function d = 13x^2 . Find its average speed over the interval between x = a and x = a + h.

 

Thank you in advance.