help1ng
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Iodine-125 has a half-life of about 60 days.

How many milligrams of a 500 mg sample will remain after 300 days?

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Below are the choices:

0.6 mg

7.8125 mg

15.625 mg

31.25 mg

the answer is the third one which is 15.625 mg
Donutsaregreat

Answer:

15.625

Step-by-step explanation:

y=b(1/2)^t/h

Substitute

y=500(1/2)^300/60

Solve

y=500(1/2)^5

y=500 x 0.03125

y=15.625