If the product of a number and 9 is 45 find the answer

If p(a) = 0.70 and p(b) = 0.20, then a and b are independent events if

Factor and solve to find roots x squared -x - 90 =0

A50-foot ladder is leaning against a vertical wall. if the base of the ladder is 45 feet from the base of the wall, find the angle the bottling of the ladder makes with the ground.