Answer:
Halife of C-14 is=14(RAM÷2)
You get=7 but further more let's say after 3 half life as your question stated it may result to decimal something which is impossible (as nucleons never be decimal)
Hence after 3half life it will continue to be 7
Answer:
Household biology is the study of household animals,insects,etc.,including how to prevent damage to our own body and to our belongings
I believe it would be the bottleneck effect. hope that helps =)