The first 3 figures in a pattern are shown. PART 1:Which of the following functions represents f(n), the number of small squares in figure n?

A) f(n) = 2n^2

B) f(n) = (n + 4) ^2

C) f(n) = 5n + 4

D) f(n) =n^2 + 4

PART 2:How many small squares will be in the 15th figure?

A) 60

B) 79

C) 229

D) 361

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?