Calculus AB, Semester 2 Assignment: Applications of Differential Equations 4. At high temperatures, nitrogen dioxide, NO2, decomposes into NO and Oz. If y(t) is the concentration of NO2 (in moles per liter), then at 600.K, y(t) changes according to the reaction law dy = -.05y2 for time t in seconds. A. Express y in terms of t and the initial concentration y. . B. Assuming that the concentration of NO2 is twice as high at t = 20 seconds as it is at 100 seconds, find the exact initial concentration of the NO2. Reminder: "Exact" means no calculator numbers