Figure out the pattern, fill in the blank.
8
48
12 4 2
2 2 1
6
The blank would be

School has 204 sixth grade students. if the sixth grade is 30% of the total school, how many students are in the middle school?

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?

Indicate the formula for the following conditions: p^c(n,r)=