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The exchange takes place in the millions of alveoli in the lungs and the capillaries that envelope them.
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:
I believe the answer is A because if shrimp eat phytoplankton, and squid eat shrimp this should work. I am not positive but I hope this helps.
To have the largest sample size also gives you more data, thus increasing the likelihood of accuracy