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A person's systolic blood pressure, which is measured in millimeters of mercury (mm Hg), depends on a person's age, in years. The equation: P = 0.005 y 2 − 0.03 y + 121 gives a person's blood pressure, P , at age y years. A.) Find the systolic pressure, to the nearest tenth of a millimeter, for a person of age 43 years. 128.96 Correct B.) If a person's systolic pressure is 128.56 mm Hg, what is their age (rounded to the nearest single year)?

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