form the half-life equation,
amount = 69(1/2)^(t/12.4) , where t is in years
plug in 75 for t
show me your work and I will help you with the others.
Tritium, a radioactive isotope of hydrogen, has a half-life of 12.4 years. Of an initial sample of 69 grams, how much will remain after 75 years?
a. 1.5848 grams
b. 61.5289 grams
c. 0.0000 grams
d. 1.0426 grams
e. 17.2500 grams
1 answer