Biff is getting ready for a long bus trip. He spends $11 on the ticket, $3 on drinks and snacks, and $16 on a new pair of headphones to listen to music. Biff plans to do online tasks using the bus's WiFi during his trip. If Biff makes $12/hour working online and has to pay $2/hour to access the bus's WiFi, how many hours long will the bus ride need to be for him to break even?
First calculate how much money Biff spent getting ready for the trip: $11 + $3 + $16 = $<<11+3+16=30>>30
Now calculate Bill's net income per hour after he pays for WiFi by subtracting the WiFi cost from his gross hourly rate: $12/hr - $2/hr = $<<12-2=10>>10/hr
Finally, divide the money Bill spent by his net hourly rate to find out how many hours he has to work to break even: $30 / $10/hr = <<30/10=3>>3 hours
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