3. You are making ampicillin plates. You are given a vial of ampicillin that is labeled as a 1% solution and told that you need to make 40 plates using this solution. Assuming that
you will need 25 mL per plate, what volume of LB agar solution should you make to
prepare the 30 plates? What volume of the 1% ampicillin solution do you need to add to
this volume of LB agar if the final concentration of ampicillin in the plates should be 50 ug/umL?

the answer that best describes the relative refractory period in the neuron is the resting membrane potential is restored, but concentrations of sodium and potassium are not restored to their original state.

the refractory period is the time during which another stimulus given to the neuron will not lead to a second potential. thus, because na+ channels are inactivated during this time, additional depolarizing stimuli do not lead to new action potentials.  

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you didn't give any options but heres what i can tell you: an inference is likely to change based on additional observations. the latter is something that you have seen or sensed using your sensory organs while the former is like a conclusion out from what you have observed.