A medical technician is trying to determine what percentage of a patient's artery is blocked by plaque. To do this, she measures the blood pressure just before the region of blockage and finds that it is 1.2010⁴ Pa , while in the region of blockage it is 1.1510⁴ Pa . Furthermore, she knows that blood flowing through the normal artery just before the point of blockage is traveling at 30.0 cm/s , and the specific gravity of this patient's blood is 1.06.

a-) What percentage of the cross-sectional area of the patient's artery is blocked by the plaque?