SOLUTION: A $3.00 toll is charged to cross the bridge from Sanibel Island to mainland Florida. A six-month pass, costing $15.00, reduces the toll to $.50. A one year pass costing $150, allow

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Question 309715: A $3.00 toll is charged to cross the bridge from Sanibel Island to mainland Florida. A six-month pass, costing $15.00, reduces the toll to $.50. A one year pass costing $150, allows for free crossing. How many crossings per year does it take, on average, for the two six-month passes to be the most economical choice? Assume a constant number of trips per month. Show work and explain. Thanks
Answer by stanbon(75887) About Me  (Show Source):
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A $3.00 toll is charged to cross the bridge from Sanibel Island to mainland Florida. A six-month pass, costing $15.00, reduces the toll to $.50. A one year pass costing $150, allows for free crossing. Show work and explain. Thanks
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No Pass Cost: C(x) = 3x dollars
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6-month pass Cost: S(x) = 15 + 0.5x dollars
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1-year pass cost: Y(x) = 150 dollars
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How many crossings per year does it take, on average, for the two six-month passes to be the most economical choice? Assume a constant number of trips per month.
Comment: What "two six-month passes"?
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Cheers,
Stan H.
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