huh. They gave you the formula, as well as the numbers. Just evaluate
1000 e^(-.028*50)
The radioactive decay of a substance is expressed by A=A^0 e^ -kt, where the initial amount A^0, decays to an amount A after t years. The positive constant k differs for each substance. Strontium 90 decays such that k=.028. Find out how much of 1,000 mg of strontium 90 remains after 50 years. Round your answer to four decimal places.
P.S. the 0 is at the bottom of the A nit at the top exponent . And the -kt is an exponent to e.
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