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
Answer:
O There will be more rapid depletion of natural resources.
Explanation:
as more and more humans are born they will need more and more food homes and many other things, but they will eventualy run out.
Please give me brainly (if it is correct which i am certain it is)
two is the nucleus since one is the nuclelous