SOLUTION: PLEASE HELP ME: The amount of a radioactive tracer remaining after t days is given by A=Ao e^-0.18t where Ao is the starting amount at the beginning of the time period. How much s

Algebra ->  Algebra  -> Exponential-and-logarithmic-functions -> SOLUTION: PLEASE HELP ME: The amount of a radioactive tracer remaining after t days is given by A=Ao e^-0.18t where Ao is the starting amount at the beginning of the time period. How much s      Log On

Ad: Algebra Solved!™: algebra software solves algebra homework problems with step-by-step help!
Ad: Algebrator™ solves your algebra problems and provides step-by-step explanations!

   

Question 55177: PLEASE HELP ME:
The amount of a radioactive tracer remaining after t days is given by A=Ao e^-0.18t where Ao is the starting amount at the beginning of the time period. How much should be acquired now to have 40 grams remaining after 3 days?
Answer by funmath(2873) About Me  (Show Source):
You can put this solution on YOUR website!
The amount of a radioactive tracer remaining after t days is given by highlight%28A=Aoe%5E%28-0.18t%29%29 where Ao is the starting amount at the beginning of the time period. How much should be acquired now to have 40 grams remaining after 3 days?
A=40
t=3
We're solving for Ao.
40=Aoe%5E%28-.18%2A3%29
40=Aoe%5E%28-.54%29
40=Ao%2A.5827482524 Scientific Calculator required for that.
40%2F.5827482524=Ao%2A.5827482524%2F.5827482524
68.64027449=Ao
Round off to whatever your teacher asks for.
Happy Calculating!!!