Element X decays radioactively with a half life of 6 minutes. If there are 790 grams of Element X, how long, to the nearest tenth of a minute, would it take the element to
decay to 26 grams?
y = a(.5)t/h

The question is kind of confusing. if it's asking how many variations of answers can you give. then do 4^5 for your answer.this would be something like the first question could be a and the 2nd c or first b next c etc. if you can, ask the teacher for a better confirmation of what it's asking. if i'm assuming correctly what it's asking, it's 625 different variations.