Solve the problem.
-A sample of 800 grams of radioactive substance decays according to the function A(t) = 800e-0.028t, where t is the time in years. How much of the substance will be left in the sample after 10 years? Round to the nearest
Whole gram.
A) 800 grams
B) 9 grams
C) 605 grams
D) 1 gram

Question

Quizplus · Accepted Answer

Plug in t=10 into the given function to get A(10) = 800e^-0.28*10 = 605.03. Rounding to the nearest whole gram gives 605 grams, so the correct answer is C. To find how much of the substance will be left after 10 years, we need to evaluate A(10):
A(10) = 800e-0.028(10) = 605.029 grams
Rounding to the nearest whole gram, we get 605 grams. Therefore, the best choice is C.

Solve the Problem. -A Sample of 800 Grams of Radioactive Substance Decays According