A formula for the relationship between weight and blood pressure in children is given by the formula below where P(x) is measured in millimeters of mercury and x is measured in pounds. Use the formula to answer the questions. P(x) = 17.5(8 + In x) 10 S xS 100 . . . What is the rate of change of blood pressure with respect to weight at the 40-pound weight level? The rate of change at the 40-pound weight level is approximately mm/pound. (Do not round until the final answer. Then round to the nearest hundredth as needed.)