A research group using hospital records developed an approximate mathematical model relating systolic blood pressure and ag P(x)= 40 +25 In x+20sxs65 P(x) is pressure measured in millimeters of mercury and x is age in years The rate of change of pressure at the end of 10 years is il mm/year (Type an integer or decimal rounded to the nearest hundredth as needed) The rate of change of pressure at the end of 30 years is mm/year (Type an integer or decimal rounded to the nearest hundredth as needed) The rate of change of pressure at the end of 60 years is mm/year (Type an integer or decimal rounded to the nearest hundredth as needed)