Cobalt-57 is used in medical testing and has a half-life of about 272 days, which means after 272 days, half of the Cobalt-57 has decayed to a less radioactive and more stable form. The function for the half-life of an
isotope is shown below.
un
A(t) = A,
(3)*
Ao is the initial amount of the isotope, h is the half-life, t is the input or time elapsed, and Aft) is the output or
the amount of the isotope remaining as a function of time.
1. What type of function does this seem to represent? Explain your reasoning using complete sentences. (6
points)