Pls help me ten points

Mary works for a company that ships packages and must measure the size of each box that needs to be shipped. mary measures a box and finds the length is 7 inches, the width is 14 inches, and the height is 15 inches. what is the volume of the box? [type your answer as a number.]

Empty box + box + empty box fill in the box is equal to 30 how

Which expression is equivalent to -12(3x-3/4)