A bag contains 4 red 3 yellow 3 blue and to white marbles for a total of 12 marbles if Lucy randomly picks to marbles from the bag without putting the first rollback which is the probability that the first marble is red and the second is white

Thales was an ancient philosopher familiar with similar triangles. one story about him says that he found the height of a pyramid by measuring its shadow and his own shadow at the same time. if the person is 5-ft tall, what is the height of the pyramid in the drawing?