=Test: 3.2 Pretest Question 4 This Test: 4 pts possible A formula for the relationship between weight and blood pressure in children is given by the formula P(x) =12.6(3 + In x), 10 sxs 100, where P(x) is measured in millimeters of mercury and x is measured in pounds. Find the weight at which the rate of change of blood pressure with respect to weight is 0.2 millimeter of mercury per pound. The weight is pounds. (Round to the nearest pound as needed.)