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Semmy [17]
3 years ago
6

Willing to give a brainliest!

Physics
2 answers:
Elodia [21]3 years ago
5 0
Probably the second one. it seems the best answer, isn't it?
Mrac [35]3 years ago
3 0

Quarks started to form

Inflationary expansion occurred

Electrons started to form

(Middle three)

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A patient is administered 20 mg of iodine-131. How much of this isotope will remain in the body after 40 days if the half-life f
igor_vitrenko [27]

The formula for half-life is:

A_{final}=A_{initial}(\frac{1}{2})^{\frac{t}{h}}

Where A is the amount of iodine-131 initially and after 40 days, t is time, h is half-life of the isotope.  Let's plug in our values to the equation:

A_{final}=20(\frac{1}{2})^{\frac{40}{8}=0.625g

Therefore, the patient has 0.625 grams of iodine-131 after 40 days.

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