A16-foot ladder is placed against the side of a building. the bottom of the ladder is 8 foot from the base of the building. in order to increase the reach of the ladder against the building, they moved the ladder four foot closer to the building. to the nearest foot, how much further up the building does the ladder now reach?

Abag contains 4 red, 7 blue and 5 yellow marbles. event a is defined as drawing a yellow marble on the first draw and event b is defined as drawing a blue marble on the second draw. if two marbles are drawn from the bag, one after the other and not replaced, what is p(b|a) expressed in simplest form? a. 7/16 b. 7/15 c. 14/16 d. 14/15