Answer:
The demand of the desk is 4000 units
Step-by-step explanation:
From the question we know that p is equals negative x squared plus 23, that can be written as:
[tex]p=-x^{2} +23[/tex]
Where p is the unit price and x represent the quantity demanded in thousands. Replacing p by 7 and solving for x, we get:
[tex]7=-x^{2} +23\\x^{2} =23-7\\x^{2} =16\\x=\sqrt{16\\} \\x=4[/tex]
Since x is given in thousands of units, if the price is $7, the demand of the desk is 4000 units.
