Q/A – How much of this sample will be left after 22.5 years?
June 30th, 2011 Filed under: sample wills — Estate Planning Author
It’s time for another question/answer. I know a lot of you like these so here we go. This one comes from
Suppose you have a 480g sample of radioactive unobtanium-437 with a half life of 7.5 years. How much of this sample will be left after 22.5 years? I really need help I dont understand the problem.thanks for ur help i would say which one is best answer but idk how to do that
Answer: The Half Life Formula is: Y = A * (1/2) ^ (t/h). Where:Y = Amount left after a certain period of timeA = Initial starting amountt = The time that has elapsedh = The time of the half life. In the given question, the initial amount of the sample is 480 grams. Therefore, A = 480. The half life of the element is 7.5 years, so h = 7.5. The amount of time that will elapse is 22.5 years, so h = 22.5. Plug these values into the equation and solve:Y = 480 * (0.5)^ (22.5/7.5) Y = 480 * .125Y = 60 gramsTherefore, after 22.5 years, 60 grams of the sample will be left.
Tagged:Mathematics
