I need help. Give an explanation, please!

Nnnnneeedd 1.find the residual if you know the actual number is 5.2 and the predicted value is 4.8

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.]

Which of the following is the explicit rule for a geometric sequence defined a recursive formula of a -5a for which the first term is 23?