A population of 900 bears decreases by 15% per year. How many bears will there be in the population after 7 years? Round your answer to the nearest whole number.
a. 289
b. 2,394
c. 9
d. 795

17. What is the value of 12x^-3y^-1 for x=-1 and y=5?
a. -12/5
b. -180
c. 7,500
d. -5/12
@Phebe

Question

A population of 900 bears decreases by 15% per year. How many bears will there be in the population after 7 years? Round your answer to the nearest whole number.
a. 289
b. 2,394
c. 9
d. 795

17. What is the value of 12x^-3y^-1 for x=-1 and y=5?
a. -12/5
b. -180
c. 7,500
d. -5/12
@Phebe

jdoe0001 · Answer

http://openstudy.com/updates/54c97314e4b07327073acb6a

campbell_st · Answer

the equation you need is 

A = P(1 - r)^n       A = future population, P = initial population 
                             r - rate of decline as a decimal, n  number of time periods. 

in your question you have P = 900, r = 15% or 0.15 and n = 7

substitute them and calculate the answer.