Someone mind checking my work?
The radioactive substance cesium-137 has a half-life of 30 years. The amount A(t) (in grams) of a sample of cesium-137 remaining after t years is given by the following exponential function.
A(t)=381(1/2)^t/30
Find the initial amount in the sample and the amount remaining after 50 years. Round your answers to the nearest gram as necessary.
initial amount = 381
after 50 years = 1270

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I sent my work down below where it says initial amount = 381
after 50 years = 1270

I plugged the information into my online calculator and that's what I got after 50 years.

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