How much of a radioactive kind of iodine will be left after 212 minutes if the half-life is 53 minutes and you start with 704 grams?​

Can someone answer these problems for me

In a school 2/3 of the students study a language of those who study a language 2/5 study french

In exponential growth functions, the base of the exponent must be greater than 1,how would the function change if the base of the exponent were 1? how would the fiction change if the base of the exponent were between 0and 1