Forrest lumber uses the function

s(t) = -90t + 810

to determine the salvage value, s(t), in dollars, of a table saw t years after its purchase. how long will it take the saw to depreciate completely?

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?