The weekly demand function for an early morning TV program coffee mug is given by p + + + 3xp = 53 where z is the number of hundreds of mugs demanded weekly, and p is in dollars. If the price p is increasing at a rate of 30 cents (- dollars) per 3 10 week, find the rate of change of the demand dx dt when the level of demand is 300 mugs (a = 3). [Hint: This is a related rates problem.] O da dt O dc dt 16 O da dt O de dt 16 O dx dt 12