HELP me

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?

Ribbon a is 1/3 meters long. it is 2/5 meters shorter than ribbon b. what's the total length of 2 ribbons?

Reyna has 3 dimes (worth 10 these coins at random, what is the probability that the two coins together least 35 cents? cents each) and 6 quarters (worth 25 cents each). if she chooses two of will be worth at