A container of hot liquid is placed in a freezer that is kept at a constant temperature of 20F. The initial temperature of the liquid is 160F. After 5 minutes, the liquid's temperature is 60F. (a) Write an equation for the temperature y of the liquid t minutes after it is placed in the freezer. y = 20+140e 0.2505t (b) How much longer will it take for its temperature to decrease to 48F? (Round your answer to two decimal places.) 6.96 min