Amagic rectangular belt shrinks its length to 1/2 and width to 1/3 whenever its owner wishes something. after three such wishes, its surface was 4cm^2. what is the original length, if the original width was 9cm?

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?