A laboratory has 20 grams of a radioactive substance that decays in such a way that 't' days later the # of grams left will be y=20(1/10)^(t/15). How much would be present?

a. 2.00 grams
b. 4.31 grams
c. 7.85 grams
d. 11.3 grams

Question

A laboratory has 20 grams of a radioactive substance that decays in such a way that 't' days later the # of grams left will be y=20(1/10)^(t/15). How much would be present?

a. 2.00 grams
b. 4.31 grams
c. 7.85 grams
d. 11.3 grams

anonymous · Answer

specify t for which u want  the answer

anonymous · Answer

t is the days. and thats all there was to the question.