They are all the examples of organ system.
What percent of potassium-40 remains undecayed in a rock that is 3.9 billion years old? The 3.9 billion year old rock has undergone three half-lives (3.9 divided by 1.3 = 3). After 3 half-lives, 12.5% of the potassium-40 remains undecayed.
Answer:
what is the length constant of the neuron? = 4. 080791139mm
Explanation:
check the file below for explanation