Can someone tell me if this is correct?
The half-life of a radioactive isotope is the time it takes for a quantity of the isotope to be reduced to half its initial mass. Starting with 215 grams of a radioactive isotope, how much will be left after 4 half-lives?Use the calculator provided and round your answer to the nearest gram.
f=215(1+0.005)^4=219.33235763
so would it be 219.32?

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@phi can you see if I got this right?

Got a little confused there but would it be 210

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