HELP ASAP I NEED HELP LOL

Aneuron is stimulated with an electric pulse. the action potential is detected at a point 3.70 cm down the axon 0.0052 s later.when the action potential is detected 7.20 cm from the point of stimulation, the time required is 0.0063 s. what is the speed of the electric pulse along the axon? (why are two measurements needed instead of only one? )

Robert wants to know which fertilizer will work the best for his grass. what can he do to explore this inquiry?

Regarding most of the narrator’s story, which word best describes the tone?