C. Photosynthesis makes food on their own
When this is the first order reaction of the radioactive decay:
and according to the first order rate equation:
㏑(Ao/A) = K t
and when Ao = is the starting concentration
and A = is the concentration at time t
and K is the rate constant
t is the elapsed time = 14.26 days
for 1 half-life ∴ Ao/A = 2
by substitution:
㏑2 = K * 14.26 days
∴ K = 0.0486 days^-1
Answer
7.53% 97% if you divide it you can get the answer
Explanation:
