Posted by **vanessa** on Monday, April 7, 2014 at 5:15pm.

Phosphorus-32 (P-32) has a half-life of 14.2 days. If 200 g of this substance are present initially, find the amount Q(t) present after t days. (Round your growth constant to four decimal places.)

How fast is the P-32 decaying when t = 21.5? (Round your answer to three decimal places.)

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