Select the relation that IS a function. a) {(-6, -5), (3, 2), (10, 8), (3, 3)}

b) {(-2, -1), (5, -1), (16, 3), (-3, -9)}

c) {(5, 10), (-3, 10), (-3, -10), (4, 7)}

d) {(21, 11), (21, 10), (21, 9), (21, 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 statement justifies why angle ebc measures 90?

Can someone tell me if this is perpendicular? !