Math Module 2 (Hard) Question 21

To rent a conference room for a group of 100 or more, a complex building charges \$15 per person for the first 100 people and \$17 for each additional attendee. Which function $C$ gives the total cost to rent a conference room, in dollars, for a group of $n$ number of participants, where $n\geq100$?

$C(x)=17n+1,500$
$C(x)=17n-200$
$C(x)=15n+1,700$
$C(x)=15n+200$

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