Write an equation for the following scenario. An gorilla grows continuously at a rate of 347.2% for the first year of life. When they are born they are 4 lbs.

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?