In a healthy person standing at rest, a comparison of arterial blood pressure measured in the arm with that measured in the legs shows that the pressure in the leg is

A lower because the blood flow rate is less

b greater because the column of blood between the arm and leg has hydrostatic pressure

c same because viscosous pressure loss precisely compansates the hydrostatic pressure increase

d lower because viscous flow resistance causes pressure loss

The correct answer is b) greater because the column of blood between the arm and leg has hydrostatic pressure

Explanation:

Pressure in a liquid is proportion to the heaight if the liquid above it.

So we use equation F = pgV

Another alternative equation can be P + pgh + 1/2pv ^2 = constant

because pgh is greater for an arm, the pressure must be less as compared with the leg. Thus, the pressure in the leg is greater because of the force of gravity.

B

Explanation:

The blood pressure in the arm is greater than the blood pressure measured in the leg because the upper arm is closer to the heart, thus gives a more effective reading. Although there is little difference between a reading taken from your arm and leg, research shows that a reading taken from the leg can help diagnose cardiovascular health risks, but the arm is preferred than the leg.

the old price per ounce is c/4.

the new price per ounce is c/3.6.

the ratio of the old price to the new one is

(c/4)/(c/3.6) = (c/c)×(3.6/4) = 0.9 . . = 9/10 . . "nine tenths" in either form