An architect is drawing floor plans for a building using a scale of 1cm to 2cm. He wants a room to be 12 meters long, How many centimeters should he show for the length of this room on the floor plans?

Length on the floor plans= {?}cm
Plz Help!!!

Barney & noblet customers can choose to purchase a membership for $25 per year members receive 10% off all store purchases 1. how much would a member pay per year if he bought $50 worth of items each year? 2. write a slope-intercept equation that expresses how much a member pays per year using x to represent his purchases per year 3. how much would a member have to spend per year to pay off his membership fee?