Find the perimeter of a circle whose diameter is7cm

Which equation represents the partial sum of the geometric series?

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.]

If sin(x) = 0 and cos(x) = 1, what is tan(x)?