In 2012, 34.1% of all glass containers were recycled. A beverage company used 350,000 lb of glass containers per year. After recycling, the amount of glass, in pounds, still in use after t years is given by N(t) = 350,000(0.373). a) Find N(7), and explain its meaning. b) Find N'(7), and explain its meaning. c) When will 6% of the original amount of glass still be in use? a) N(7) = lb (Round to two decimal places as needed.)