Friends, i need help with this question.

Simplify a7/a4 a) 1/a3 b)-a/a2 c)a4/a3 d)a3

16 more than the product of 5 and p

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?