The cost of holding a party at a rollerskating rink is a function of n, the number of people in the party. The cost function, C , can be represented with this set of rules:

Question

C(n) = 150 ,0 < n ≤ 12
260, 12 < n ≤ 20
400, 20 < n ≤ 30

The cost of a party with 9 people is $_____
.

The cost of a party with 20 people is $_____

Answer 1

since 9 ≤ 12, that would be C(9) = 150
now do n=20

Answer 2

C(9)=400