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The half-life of a radioactive...

The half-life of a radioactive substance is 10 days. After 8 days a sample of the substance has been reduced to a mass of 2 mg.Q1:

What was the initial mass (in mg) of the sample?

(Round your answer to 2 decimal places as needed.)Q2:

Using your answer from above, after how many days will there only be 0.1 mg of substance left?

(Round your answer to 2 decimal places as needed.)

What was the initial mass (in mg) of the sample?

(Round your answer to 2 decimal places as needed.)Q2:

Using your answer from above, after how many days will there only be 0.1 mg of substance left?

(Round your answer to 2 decimal places as needed.)

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