the answer is d bc the ratio is 2:3 just multiply that by 5
300 represents the initial amount of the substance, the amount present at t=0.
0.5 is the fraction of substance remaining at the end of each year. The fact that this number is 1/2 indicates the half-life of the substance is 1 year.
72+57.6+43.2+8.64+8.64
B.) 190.08
Seventy five dollars hope this could help[
