SOLUTION: the half-life of a certain radioactive substance is 8 hours. there are 5 grams present initially. which of the following gives best approximation when there will be 1 gram remainin
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Question 1048723: the half-life of a certain radioactive substance is 8 hours. there are 5 grams present initially. which of the following gives best approximation when there will be 1 gram remaining.
Answer by josgarithmetic(39617) (Show Source): You can put this solution on YOUR website!
--------exponential decay model
Need find k. The variable to find, AFTER k is found, will be t.
HALF LIFE
-
You would like to put a decimal number to that.
, but remember to include the negative sign in the model!!
WHEN THE 5 GRAMS BECOME 1 GRAM? FIND t.
, if you want to keep the positive value of k found earlier.
YOU FINISH IT.
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