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makaylahunt
26.11.2019 •
Mathematics
An online music store sells about 4000 songs each day and charges $1 per song. for each $0.05 increase in price per song, about 80 fewer songs are sold each day. write a quadratic function that models the revenue for the sale of songs.
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Ответ:
The answer is 10
Step-by-step explanation:
120≥ 10n+20
-20 -20
100≥ 10n
Divide by 10
10≥ n