(1 point) A price p in dollars) and demand for a product are related by 2x2 + 2xp + 50p2 = 11000. If the price is increasing at a rate of 2 dollars per month when the price is 10 dollars, find the rate of change of the demand. Rate of change of demand = (1 point) A 12 foot ladder is leaning against a wall. If the top slips down the wall at a rate of 2 ft/s, how fast will the foot be moving away from the wall when the top is 9 feet above the ground? The foot will be moving at ft/s