Answer:
cost for ordering n tickets online. = 16n+2.50
where n is the number of tickets ordered.
Explanation:
Given that when purchasing tickets to a waterpark on internet
he has to pay 16 dollars per ticket and also an additional service cost of 2.50 dollars.
This 2.50 dollars is fixed irrespective of number of tickets he orders
Hence if n tickets are purchased online,
Ticket cost to be paid = 16(n) = 16n
One time service cost = 2.50
Thus the cost for ordering n tickets online. =total cost
C= 16n+2.50
where C represents the cost, and n is the number of tickets ordered.
Here we substitute n=4, to get his particular cost
C= 66.50 dollars