:at a given time of day, the ratio of the height of an object to the length of its shadow is the same for all objects. if a 3-ft stick in the ground casts a shadow of 1.5 ft, find the height of a tree that casts a shadow that is 18.65 ft.

The number if marbles of different colors stored in a hat is listed below: 4 red marbles 10 green marbles 7 blue marbles. without looking in the hat, dan takes out a marble at random. he replaces the marble and then takes out another marble from the hat. what is the probability that dan takes out a blue marble in both draws?