What is the half-life of the goo in minutes

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At the beginning of an experiment, a scientist has 372 grams of radioactive goo. After 105 minutes, her sample has decayed to 46.5 grams.
What is the half-life of the goo in minutes?
Find a formula for , the amount of goo remaining at time .
How many grams of goo will remain after 62 minutes?

Reference no: EM13179354

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