If Argentinosaurus, a long-necked, gigantic sauropod, had a head height of 19 m and a heart height of 7.9 m, what (hydrostatic) gauge pressure in its blood was required at the heart such that the blood pressure at the brain was 80 torr (just enough to perfuse the brain with blood)? Assume the blood had a density of 1.06 103 kg/m3.