There was a sample of 200 milligrams of a radioactive substance to start a study. since then, the sample has decayed by 5.4% each year. let t be the number of years since the start of the study. let y be the mass of the sample in milligrams. write an exponential function showing the relationship between y and t .
For this case we have a function of the form: y = A * (b) ^ t Where, A: initial amount b: decrease rate t: time Substituting values we have: y = 200 * (0.946) ^ t Answer: An exponential function showing the relationship between and and is: y = 200 * (0.946) ^ t
