SOLUTION: An element with mass 970 grams decays by 27.7% per minute. How much of the element is remaining after 13 minutes, to the nearest 10th of a gram?

Question 1179624: An element with mass 970 grams decays by 27.7% per minute. How much of the element is remaining after 13 minutes, to the nearest 10th of a gram?

Found 2 solutions by josgarithmetic, ikleyn:
Answer by josgarithmetic(39625) (Show Source): You can put this solution on YOUR website!
In what way do you need to solve this?

TIME AMOUNT PRESENT 0 970 1 706.2 2 514.1 3 374.3 4 272.5 5 198.3 6 144.4 7 105.1 8 76.5 9 55.7 10 40.6 11 29.5 12 21.5 13 15.6

Answer by ikleyn(52847) (Show Source): You can put this solution on YOUR website!
.

The formula for the mass M(n) remaining after n years is M(n) = = . After 13 years M(13) = = 14.31 = 14.3 grams (rounded). ANSWER

Solved.

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