The average price of a ticket to a baseball game can be approximated by $p(x)=0.03{x}^{2}+0.55x+9.67$, where x is the number of years after 1991 and p(x) us in dollars.

a) Find p(4)

b) Find p(14)

c) Find p(14)-p(4)

d) Find $\frac{p(14)-p(4)}{14-4}$, and interpret this result.

a) Find p(4)

b) Find p(14)

c) Find p(14)-p(4)

d) Find $\frac{p(14)-p(4)}{14-4}$, and interpret this result.