Aradioactive element decays exponentially at a rate of 0.13% each hour. which of the following is true?

It seems that you have missed the necessary options for us to answer this question, but anyway, here is the answer. If a radioactive element decays exponentially at a rate of 0.13% each hour, then the statement that is true is this: If there are 1,000 grams of the element, there will be 756.9 grams in two hours. Hope this helps.

A. dividing 99 by 204 will tell you that 99 out of 204 of the people were females at the action movie.