Solve
-A Common Equation Used in Business Is a Demand $p = - x ^ { 2 } + 107$

Multiple Choice

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 $p = - x ^ { 2 } + 107$ , for a certain style of calculator, $\mathrm { p }$ is the price per calculator in dollars and $\mathrm { x }$ is the quantity demanded in thousands. Find the demand for the calculator if the price is $\$ 7$ per calculator.

A) 11 thousand units
B) 58 thousand units
C) 50 thousand units
D) 10 thousand units