SOLUTION: At the beginning of an experiment, a scientist has 324 grams of radioactive goo. After 255 minutes, her sample has decayed to 40.5 grams.

Algebra ->  Exponential-and-logarithmic-functions -> SOLUTION: At the beginning of an experiment, a scientist has 324 grams of radioactive goo. After 255 minutes, her sample has decayed to 40.5 grams.      Log On


   

Question 1162938: At the beginning of an experiment, a scientist has 324 grams of radioactive goo. After 255 minutes, her sample has decayed to 40.5 grams.
Found 2 solutions by josgarithmetic, ikleyn:
Answer by josgarithmetic(39618) About Me  (Show Source):
You can put this solution on YOUR website!
Having a question might be useful. One would assume the situation is exponential decay. You could try using a model like,.... Notice that 40.5 is 1%2F8 of 324. If you start with 324, then:
HALVING
PERIODS     AMOUNT GOO
0            324
1            162
2             81
3             40.5

Maybe you can see how to use this pattern.
255 minutes is 3 halving periods.

Answer by ikleyn(52794) About Me  (Show Source):
You can put this solution on YOUR website!
.

When the post comes with no question, it does not deserve any answer.


The only thing it deserves is to be redirected to the TRASH SECTION.