Answer to Question #280662 in Algebra for og3718

Question

An element with mass 630 grams decays by 18.8% per minute. How much of the element is remaining after 7 minutes, to the nearest 10th of a gram?

Answer 1

Initial=630 , rate =18.8%, t=7minutes .

The remaining element is calculated by using the formula I(1-r/100)^t

= 630(1-18.8/100)⁷

^{=146.6 grams}