Question: I need to understand how to enter my solution as a number rounded to the nearest tenth with the right unit for example, 42.5 days,

I need to understand how to enter my solution as a number rounded to the nearest tenth with the right unit for example, 42.5 days, when trying to formulate theisotope thulium-167 is used in laser scans for medical treatmentsand Itsrate of decay is 0.075, so how many days does it take 500 grams ofthe isotope to decayto 250 g? Please guide me.

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