If a radioactive isotope that was injected into your bloodstream has a half-life of 5 hours, how many hours do you have to wait before the amount of this isotope in your body is 1/16 its original amount?

Total time = 20 hours

Explanation:

Half life is the amount of time it takes for a substance to decay tohalf of it's original amount.

Half life = 5 hours.

We have to obtain the number of half lives to get the time required.

1st half life = 1/2

2nd half life = 1/4

3rd half life = 1/8

4th half life = 1/16

So ffour half lives.

Total time = number of half lives * Time of half life

Total time = 4 * 5

Total time = 20 hours

need to see circuit to get time constant

a cold ice-tea.

pour in room temperature or cold water. cover the pitcher and refrigerate. steep white or green tea for 6 to 8 hours; steep black or oolong tea for 8 to 12 hours.jun 28, 2015