The function P(t)=34,000(0.99)t models a town's population t years after 1980.
What does the number 0.99 tell you?
a. The current population of the town is 1% of 34,000
b. The population in 1980 was 99 people
c. The population is increasing by 99% per year
d. The population is decreasing by 1% per year