Jessica R.

asked • 02/02/21

Help me plz!!!!

The​ half-life of a radioactive substance is 31.7 years.

(a) Find the exponential decay model for this substance

(b) How long will it take a sample of 400 grams to decay to 300 grams?

(c) How much of the sample of 400 grams will remain after 20 years?

A(t)=A0 e________ Round to the nearest thousandth

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