You go to the doctor and he gives you 11 milligrams of radioactive dye. After 16

Question

You go to the doctor and he gives you 11 milligrams of radioactive dye. After 16 minutes, 6.75 milligrams of dye remain in your system. To leave the doctor's office, you must pass through a radiation detector without sounding the alarm. If the detector will sound the alarm if more than 2 milligrams of the dye are in your system, how long will your visit to the doctor take, assuming you were given the dye as soon as you arrived? Give your answer to the nearest minute You will spend Preview minutes at the doctor's office. Get help: Video

Explanation / Answer

If 4.25 mg dye gone in =16 min

Then 1 mg dye gone in=16/4.25

=64/17 mins

But if you have wait till 2 gms dye left.. so you must wait for 2 gm dye so 11-2=9

So 9×64/17= 34 mins

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