Autility worker is 5.5 feet tall and is casting a shadow 4 feet long . at the same time a nearby utility pole casts a shadow 20 feet long. write and solve a proportion. to find the height of the utility pole

The u-drive rent-a-truck company plans to spend $13 million on 320 new vehicles. each commercial van will cost $25 comma 000, each small truck $50 comma 000, and each large truck  $80 comma 000. past experience shows that they need twice as many vans as small trucks. how many of each type of vehicle can they buy?