A radioactive substance decays exponentially. A scientist begins with 130 milligrams of a radioactive substance. After 24 hours, 65 mg of the substance remains. How many milligrams will remain after 45 hours?

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Mathematics

Efrain Garza

1 May, 06:16

A radioactive substance decays exponentially. A scientist begins with 130 milligrams of a radioactive substance. After 24 hours, 65 mg of the substance remains. How many milligrams will remain after 45 hours?

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Elias Strong · Answer 1

N (t) = N∗.5t/h where n (t) is amount of substance left, N = initial amount, t = current time, and h = half-life time. h = 24 hours t = 45 hours, N = 130mg

therefore, N (t) = 130∗.545/24=35.44mg