What is the area of this face?

In the diagram, the ratio of ab to ae is (1/2) . what is the ratio of the length of to the length of ?

If 30 lb of rice and 30 lb of potatoes cost ? $27.60? , and 20 lb of rice and 12 lb of potatoes cost ? $15.04? , how much will 10 lb of rice and 50 lb of potatoes? cost?

An ant travels at a constant rate of 30cm every 2 minutes. at what speed does the ant travel per minute