Most of the worlds fossil fuels are made up of Coal.
Definite volume is doesn’t possess a definite volume so therefore the answer is c
Answer:
It's producers because those are the one's that sell them to the consumers.
Answer:
a. 0.5 grams b. 0.25
Explanation:
Just use the half-life formula(I linked it below)
a. 4(1/2)^90/30=1/2
b. 4(1/2)^120/30=1/4