R = 45 x - .5 x^2
C = 25 x
3030 = 20 x - .5 x^2
.5 x^2 - 20 x + 3030 = 0
This has only complex roots. I suspect a typo.
The revenue achieved by selling x graphing calculators is figured to be x(45 - 0.5x) dollars.
The cost of each calculator is $25. How many graphing calculators must be sold to make a profit (revenue - cost) of at least $3030.00?
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