Answer
32 m/s
Work Step by Step
Calculate the speed by dividing the change in position by the change in time.
$$v=\frac{\Delta x}{\Delta t}$$
$$=\frac{7.20 \times10^{-2}m-3.70 \times10^{-2}m}{0.0063s-0.0052s}=32 m/s$$
Two measurements are required because there may be a delay between when the nerve is stimulated and when the action potential is initiated.
By taking 2 measurements, this time delay is subtracted away in the denominator of the calculation.
