Can someone please help me understand ?

SoccerBoss
Category:
Mathematics
Price: $5 USD

Question description

You own a motel with 46 rooms and have a pricing structure that encourages rentals of rooms in groups. One room rents for $70, two rent for $67 each, and in general the group rate per room is found by taking $3 off the base of $70 for each extra room rented.

(a) How much money do you take in if a family rents four rooms? (Round your answer to the nearest dollar.)
 

(b) Use a formula to give the rate you charge for each room if you rent n rooms to an organization. 

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