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## Homework Statement

L(t)=15(0.5^(t/26))

Find the rate of L, when t=60

## Homework Equations

## The Attempt at a Solution

L'(t) = (15/26)(1/2)^(t/26)ln(1/2)

L'(60)=(15/26)(1/2)^(60/26)ln(1/2)

= -0.08

Did I do this right? If I did it wrong, please say where, I am having great trouble understanding this.