Answer:
15
Step-by-step explanation:
37.5÷2.5 goes in 15 times
This is a typical radioactive decay problem which uses the general form:
A = A0e^(-kt)
So, in the given equation, A0 = 192 and k = 0.015. We are to find the amount of substance left after t = 55 years. That would be represented by A. The solution is as follows:
A = 192e^(-0.015*55)
<em>A = 84 mg</em>
2/9
5/10 *4/9=2/9
ask if you have any more questions
I assume you are asking what percent is 255 out 0f 300. And the answer to that is 85%