Let d(t) be the number of dogs in the United States in year t, and let c(t) be the number of cats in the United States in year t, where t = 10 corresponds to 2010.
(a) Find the function p(t) that represents the total number of dogs and cats in the United States.
(b) Interpret p(16).
(c) Let n(t) represent the population of the United States in year t, where t = 10 corresponds to 2010. Find and interpret
h(t) = p(t) / n(t).