The ratio of boys to girls in Ms. Graham’s class is 3 to 5. There are 20 girls in the class. What is the total number of students in Ms. Graham's class?

If 3 3/4 lb. of candy costs 20.25 how much would 1lb. of candy cost

Sara goes on a slingshot ride in an amusement park. she is strapped into a spherical ball that has a radius 3*10^2 of centimeters. what is the volume of air in the spherical ball? use this formula: volume of a sphere=4/3pi, r^3 , where r is the sphere’s radius.

Find the amount of simple interest earned for depositing the given principle in an account if $2200 is invested at 5.5 % for 6 months