initial sample of 560g of a radioactive substance decays according to the function A(t)=560e^-0.036t where t is given in years.

Question

(a) How many grams of the substance will remain after 79 years? Round your answer to one decimal place.

(b) What is the half-life of the substance? Round your answer to one decimal place.

Answer 1

(a)

A(7) = 560e^(0.036)(7)

Can you compute and answer?

(b)

0.5 = e^(0.036)(t)

Can you solve for t and answer?