Isabel wants to measure the height of a tree. She sights the top of the tree, using a mirror that is lying flat on the ground. The mirror is from the tree, and Isabel is standing from the mirror, as shown in the figure. Her eyes are above the ground. How tall is the tree? Round your answer to the nearest foot. (The figure is not drawn to scale.)

As a project for math class, two students devised a game in which 3 black marbles and 2 red marbles are put into a bag. first the players must decide who is playing black marbles and who is playing red marbles. then each player takes a turn at drawing a marble, noting the color, replacing the marble in the bag, and then drawing a second marble and noting the color before returning it to the bag. the point scheme for the game is detailed in the table below. point values for marble game black marble points red marble points both black: +2 points both red: +4 points different colors: –1 point different colors: –1 point both red: 0 points both black: 0 points