In a certain group, 12 of the children average are age 10 and eight are age 15. What is the average the ages of all the children in the group?
Square RSTU shown below is rotated in a plane about its center in a clockwise direction. The minimum number of degrees necessary for T to be in the position where S is
A store usually sells a certain item at 40% profit. One week the store has a sale, during which the item is sold for 10% less than usual price. During the sale, what is the profit percentage the store makes on each of these items?
What is the volume of a cube with a surface area of 96?
A cubical block of metal weighs 6 pounds. How much will another cube of the same metal weigh if its sides are twice as long?
A rope 40 feet long is cut into two pieces. If one piece is 18 feet longer than the other, what is the length, in feet, of the shorter piece?