Why was carbon-14 perfect for determining the dates that organisms died? a. it is only present in mammals. b. it decays very quickly once an organism has died. c. it is only found in ancient plants. d. it is absorbed by every organism while alive, and has a known rate of decay.

The correct answer is D. It is absorbed by every organism while alive, and has a known rate of decay.

step-by-step explanation:

you can add the two numbers and divide the result by 2. or you can find the gap between the two numbers and add half of this to the smaller number.

the expression (1.26)2t reveals the approximate rate of increases in the number of plants semiannually.

hope this : )