A clothing store donated $ 634 of their profits to charity. If they made $ 7925 in profit, what percent of their profits did they donate?

What is the value of the expression below? (81^2)^1/8

Haley buys 9 pounds of apples for $3. how many pounds of apples can she buy for $1?

: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?