This is a percentage question I'm sure. To get any question, divide by 100, multiply by 12.5
I can also tell you a different way. 12.5% is 1/8. 1/8 of 64 is 8.
1 dozen = 12 half a dozen = 6
The divisors of 64 are: 1 2 4 8 16 32 64.
1 mg
Copper-64 (Cu-64) has a half-life of approximately 12.7 hours. After one half-life (12.7 hours), half of the original sample would remain. Therefore, from a 2 mg sample, after 12 hours, approximately 1 mg of Cu-64 would remain, as it has not yet fully completed one full half-life.
5.3333
1 mg
12 1/2
1/64
1 dozen = 12 half a dozen = 6
The divisors of 64 are: 1 2 4 8 16 32 64.
1 mg
1 mg
Copper-64 (Cu-64) has a half-life of approximately 12.7 hours. After one half-life (12.7 hours), half of the original sample would remain. Therefore, from a 2 mg sample, after 12 hours, approximately 1 mg of Cu-64 would remain, as it has not yet fully completed one full half-life.
5.3333
18/12 = 12/12 + 6/12 12/12 = 1 6/12 = 1/2
The easiest way to find this out is to know that 1/2 is equal to .5, right? So, divide 31 by 64. You get a strange number starting with .484375. So no, 31 over 64 is not equal to a half.
1 2 4 8 16 32 64.