The word midpoint refers to the point that divides the line segment into two equal parts. From the given above, for O to be the midpoint, the length of the segment OM should be equal to segment ON. Thus, the answer is letter C. The fourth choice may also be correct but it does not guarantee that O is the midpoint.
well we know that we have 80mL and we also know that those 80mL will represent the "solute" or the 40% of the Tennessee whiskey total which we can say is 100%, so if 80 is the 40%, how much will it be for the 100% in mL?
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