Hello can someone please help me with this question ?

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? )

In some plants, pointed leaves (p) are dominant over rounded leaves (p). a plant with a genotype of pp

What macromolecule is produced during translation? a. carbohydrate b. rna c. dna d. protein