Let b(t) be the number of births in the United States at the end of year t, and let d(t) represent the number of deaths in the United States at the end of year t. If p(t) is the population of the United States at the beginning of year t, write a function c(t) that represents the percent change in the population of the United States at the end of year t.
The Attempt at a Solution
There was no other work I could come up with besides going straight to the answer:
Answer: c(t)= (b(t)-d(t))/p(t)
Please show all work... Thanks!