In a group of students, the ratio of girls to boys is 3 to 2. if there are 15 girls, how many total students are there? 10 20 25 30

Which expression is equivalent to (3^2)^-2 a.-81 b.-12 c.1/81 d.1/12

Suppose that sahil knows that 45 people with ages of 18 to 29 voted. without using a calculator, he quickly says then 135 people with ages of 30to 49 voted. is he correct? how might sohil have come up with his answer so quickly?

Find the value of x to the nearest tenth.