How much of a radioactive kind of tin will be left after 30 days if you start with 240 grams and the half-life is 10 days?

Find x & pleeeeaaaassseeee me !

Gretchen is setting up for a banquet. she has 300 chairs and needs to distribute them evenly among t tables. how many chairs should she put at each table? write your answer as an expression.

One positive number is 9 more than twice another. if their product is 95, find the numbers