Pls help me get this right

On an airplane there are two seats on the left side and three seats on the right side there are 90 seats o the right side of the plane

Issof claims that the scale factor is 1/2. which statement about his claim is correct

Arestaurant charges $100 to rent its banquet room for an event. it also charges $15 to serve dinner to each guest. write an equation for the total cost of the banquet room in terms of the number of guests. deine your variables. what is the total cost of the banquet room for 20 guests?