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P is the amount of certain substanc left...

P is the amount of certain substanc left in after time t. If the rate of evaporation of the substance is proportional to the amount remaining, then

A

`P=ce^(kt)`

B

`P=ce^(-kt)`

C

`P=ckt`

D

`Pt=c`

Text Solution

Verified by Experts

The correct Answer is:
B
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