At a temperature of t degrees fahrenheit, sound travels s feet per second, where s equals 21.9 startroot 5 t plus 2457 endroot . during blasting for avalanche control in the mountains, sound traveled at a rate of 1121 ft/sec. what was the temperature?

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?