SOLUTION: The amount of radioactive substance present, in grams, at time t, in years, is given by the formula y=20(3)^-0.6t. Find the number of grams present in 4 years.

Algebra ->  Exponential-and-logarithmic-functions -> SOLUTION: The amount of radioactive substance present, in grams, at time t, in years, is given by the formula y=20(3)^-0.6t. Find the number of grams present in 4 years.      Log On


   

Question 1149231: The amount of radioactive substance present, in grams, at time t, in years, is given by the formula
y=20(3)^-0.6t.
Find the number of grams present in 4 years.
Answer by greenestamps(13198) About Me  (Show Source):
You can put this solution on YOUR website!


Use a calculator: plug in t=4 and evaluate.

20%283%29%5E%28-0.6%2A4%29 = ??