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At the beginning of an experiment, a scientist has 356 grams of radioactive goo. After 210 minutes, her sample has decayed to 44.5 grams. Find a formula for G ( t ) , the amount of goo remaining at time t . Keep at least 5 decimal places.

 

I think you use exponents, but I don't know how.

 Jul 12, 2020
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R =A(0) x 1/2^(elapsed time/half-life)
R =Remaining substance
A(0) =Initial substance
44.5 =356 * 1/2^(210/h), solve for h
h = 70 minutes - half-life of this "goo"!!

 Jul 12, 2020

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