Question

The speed S of blood that is r centimeters from the center of an artery is given below, where C is a constant, R is the radius of the artery, and S is measured in centimeters per second. Suppose a drug is administered and the artery begins to dilate at a rate of dR/dt. At a constant distance r, find the rate at which S changes with respect to t for C = 1.54 105, R = 1.3 10-2, and dR/dt = 1.0 10-5.

S = C(R^2 − r^2)

dS/dt =______cm/s

Answer 1

75

Answer 2

C = 1.20 105, R = 1.2 10-2, and dR/dt = 2.0 10-5.

Answer 3

how about these