Maybe you mean
A(t) = 500 e^-(.044 t)
????????
A(20) = 500 e^-.88
= 500 * .415
Sample of 500gms radioactive substance decays according to the function A(t)-500-0.044t where t is the time in years. How much of the substance will be left in the sample after 20 years?round to the nearest whole gram
2 answers
207.391