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An ophthalmic solution of a drug is 10 mg/mL exhibits degradation at a rate of 0.0012/day....

An ophthalmic solution of a drug is 10 mg/mL exhibits degradation at a rate of 0.0012/day. How much will remain after 30 days? How long will it take for 90% of its original concentration to degrade?
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Answer #1

The solution of drug is 10mg/ml

Degradation at rate of 0.0012/day

So for 30 days it would be 0.036 thus remaining is 9.964mg.

It takes 9months that is 270 days to degrade 90%.

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