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The city bus company usually transports 12000 riders per day at a ticket price of $1. The company wants to raise the tickets price and knows that for every 10 cents increase, the number of riders decreases by 400.
A. What price for a ticket will maximize revenue?
pls help

  • math -

    I did this already today.
    Charge 50 cents

  • math -

    I don't know how to do it either but the answer in the textbook says $2.00

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