Poiseuille's law states that the blood flow rate F ( in L/min ) through a major artery is directly proportional to the product of the fourth power of the radius r and the blood pressure P. During heavy exercise, normal blood flow rates sometimes triple. If the radius of a major artery increases by 7%, approximately how much harder must the heart pump?
A)about 1.31 times as hard
B)about 3.43 times as hard
C)about 2.29 times as hard
D)about 2.04 times as hard
E)about 1.92 times as hard

Question

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The Answer of Poiseuille's law states that the blood flow rate F ( in L/min ) through a major artery is directly proportional to the product of the fourth power of the radius r and the blood pressure P. During heavy exercise, normal blood flow rates sometimes triple. If the radius of a major artery increases by 7%, approximately how much harder must the heart pump?
A)about 1.31 times as hard
B)about 3.43 times as hard
C)about 2.29 times as hard
D)about 2.04 times as hard
E)about 1.92 times as hard

Poiseuille's Law States That the Blood Flow Rate F