Final answer:
To calculate the cost for Mark to paint rooms, we need to know the base charge for painting up to a certain number of rooms and the additional charge for each additional room. If the number of rooms is less than or equal to the base number, the cost is the base charge. If the number of rooms is greater, then additional charges are added.
Step-by-step explanation:
To calculate the cost for Mark to paint rooms, we need to know the base charge for painting up to a certain number of rooms and the additional charge for each additional room. Let's say Mark charges $X to paint up to Y rooms, and $Z for each additional room.
If the number of rooms to be painted is less than or equal to Y, the cost would be X. If the number of rooms is greater than Y, the cost would be X plus the additional charge, which is Z multiplied by the number of additional rooms.
For example, if Mark charges $200 to paint up to 2 rooms, and $50 for each additional room, the cost to paint 4 rooms would be $200 + ($50 x 2) = $300.