Please help ill mark brainliest

:24% of students in a class are girls. if there are less than 30 students in this class, how many students are there? how many girls are there?

Two friends are reading books. jimmy reads a book with 21,356 words. his friend bob reads a book with one-and-a-half times as many words. which expression represents the number of words bob reads?

Hurry which expression is equivalent to 3√x^5y?