D - your high school guidance counselor
*you don’t go to a school guidance counselor to get yourself an internship, they might be able to help a little but they aren’t that educated on that topic
True, the diagonal is usually described as the dimensions
From the information provided, A single-price monopolist earns a total profit of $80 when it produces and sells 20 units of its good. See the attached for more information.
<h3>How do we arrive at $80?</h3>
Total profit = revenue - cost
Revenue = price x number of units sold
Revenue at 20 units =
20 x9 = $180
Given that Total cost at 20 units is $100, thus,
Total Profit = 180 - 100
= $80.
Learn more about profit at;
brainly.com/question/1078746
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