When a small plane flies with the wind, it can travel 800 miles in 5 hours. when the plane flies in the opposite direction, against the wind, it takes 8 hours to fly the same distance. find the rate of the plane in still air and the rate of the wind.

cost for ordering n tickets online. = 16n+2.50

where n is the number of tickets ordered.

Step-by-step 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