SOLUTION: The function f(x) = 300(0.5) x/60 models the amount in pounds of a particular radioactive material stored in a concrete vault, where x is the number of years since the material was

Algebra ->  Logarithm Solvers, Trainers and Word Problems -> SOLUTION: The function f(x) = 300(0.5) x/60 models the amount in pounds of a particular radioactive material stored in a concrete vault, where x is the number of years since the material was      Log On


   

Question 1034023: The function f(x) = 300(0.5) x/60 models the amount in pounds of a particular radioactive material stored in a concrete vault, where x is the number of years since the material was put into the vault. Find the amount of radioactive material in the vault after 170 years. Round to the nearest whole number.
a. 425 pounds
b. 42 pounds
c. 235 pounds
d. 53 pounds
Answer by fractalier(6550) About Me  (Show Source):
You can put this solution on YOUR website!
I think you mean
f%28x%29+=+300%280.5%29%5E%28x%2F60%29
If so, we plug in 170 for x and get
f%28170%29+=+300%28.5%29%5E%28170%2F60%29+=+42 pounds.
Choice B.