Solve.A common equation used in business is a demand equation. It expresses the relationship between the unit price of some commodity and the quantity demanded. In the demand equation 
for a certain style of calculator, p is the price per calculator in dollars and x is the quantity demanded in thousands. Find the demand for the calculator if the price is $5 per calculator.
A. 61 thousand units
B. 9 thousand units
C. 40
thousand units
D. 10 thousand units
Answer: B
Mathematics
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A. 
B. 
C. 
D. 
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