There was a sample of 350 milligrams of a radioactive substance to start a study. since then, the sample has decayed by 7.1% 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.

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Mira Hardy

Mathematics

20 February, 03:43

There was a sample of 350 milligrams of a radioactive substance to start a study. since then, the sample has decayed by 7.1% 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.

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Aleah Ellison · Answer 1

y = Ae^ (-kt), where y is the mass in milligram of the sample at time t, A is the initial amount, and k is the decay rate and t is the time So the exponential function showing the relationship between y and t. y = 350e^ (-0.07t)