Answer
more than 500
Work Step by Step
For the company to have a profit, the revenue needs to exceed the cost, which happens when $x\gt500$. Thus, more than 500 radios must be produced and sold.
Precalculus (6th Edition) Blitzer
by Blitzer, Robert F.
Published by
Pearson
ISBN 10:
0-13446-914-3
ISBN 13:
978-0-13446-914-0
Chapter 7 - Section 7.1 - Systems of Linear Equations in Two Variables - Exercise Set - Page 819: 68
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