Show that the points a(2, 2), b(5,7). c(-5, 13), and d(-8, 8) are the vertices of a rectangle.
a ab = cd = 8 bc = da = 4
b. ab = cd = 34 bc = da = 136
ac = bd = 170
ab = cd = 134 bc = da = v136 ac = bd = v170

Jake volunteers to out his younger brother's basketball team in his free time. one of his tasks is to ensure that all the basketballs have enough air in them. given that a properly inflated basketball measures 8.8 inches across, what is the total volume of air inside six of jake’s basketballs? assume that the wall of each ball is infinitely thin.