Find the length of the latus rectum of the parabola when the focus is (2, 5) and directrix is x= 4 a) 4
b) -4
c) 2
d) -2

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?