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4. -11 points HarMathAp11 94.055. Suppose that for a certain city the cost C, in dollars, of obtaining drinking water that contains p percent impurities (by volume) is given by 110,000 1100, (a) Find the rate of change of cost with respect to p when impurities account for 1% (by volume No R se (b) Write a sentence that explains the meaning of your answer in part (a). If impurities increase 1%, the cost will increase by the absolute value of this amount. If impurities increase 1%, the cost will decrease by the absolute value of this amount. If impurities increase by this percent, the cost will decrease by $10,000. If impurities increase by this percent, the cost will increase by $10,000. If impurities decrease 1%, the cost will decrease by the absolute value of this amount. Need Help? Read It My Notes Ask Your Teacher