# Help Please! A radioactive substance decaying so that after t years, the amount remaining, expressed as a percent of the original amount is a(t) = 100(1.1)^-t. determine the function, a', which represents the rate of decay of the substance.?

##### 1 Answer

Apr 21, 2018

#### Explanation:

To make differentiation easier, rewrite using the fact that

Recall that

We can now differentiate this using the Chain Rule and the rules for differentiating the exponential function of base

Recalling that