The half-life of carbon 14 is years. How much would be left of an original -gram sample after 2,292 years? (To the nearest whole number)

A = 0.75 gram or 1 gram

Step-by-step explanation:

The half-life of carbon 14 is years. How much would be left of an original -gram sample after 2,292 years? (To the nearest whole number).

We can use the following formula for half-life of to find out how much is left from the original sample after 2,292 years:  

where:

A is the amount left of an original gram sample after t years, and  

is the amount present at time t = 0.

The half-life of    is the time t at which the amount present is one-half the amount at time t = 0.

If 1 gram of   is present in a sample,  

 Solve for A when t = 2,292:  

Substituting  = 1 gram into the decay equation, and we have:  

A = 0.75 g or 1 g  

i pretty sure it is

b) 1/3 * 1/5

step-by-step explanation:

each smallest part is 1/15 since the written one is 1/5 and it's divided by 3 equal parts. (1/5 )/3 = 1/15 = 1/3 * 1/5