Half Life = 5 days
If we start with 200 grams, how much is left after 13 days?
Ending Amount = Beginning Amount / 2 ^ (time / half-life)
Ending Amount = 200 / 2^(13/5)
Ending Amount = 200 /
6.062866266
Ending Amount =
32.9876977693
grams
Answer is (B)
Source1728.com/halflife.htm
