Dr. Horton is studying an endangered fox whose population is declining. The population decrease is represented by the function f(x) = 6500(1 - 0.10)^x - 40. She is using this equation to study the population decline from year to year, with x representing each year.

a) Calculate how many foxes there were in year 3 and in year 8. You must show all your work and explain each step.

(please someone help me with this!)

2 answers

huh? You have the formula. Just plug in the values for x.
For example,
f(5) = 6500 * 0.9^5 - 40 = 3798
I have no idea which "steps" you need to show. Just evaluate the expression.
Dr. Suzuki is studying an endangered fox whose population is declining by 20% every year. If there are currently 3,300 foxes, how many will remain in 4 years?

If necessary, round your answer to the nearest whole number.