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Jessica has $7 left in her pocket. She spent $9 on a ticket to a baseball game, $3 on a hot dog, and $11 on a hat. How much money did she have at the beginning of the day?

The August 17, 2009, San Francisco Chronicle reported on the rapid growth of Facebook.com. Facebook is becoming a social superpower with 131 million registered members who log in at least once daily. They share 2.1 billion photos and 11.1 million videos each month....

It takes Caroline 22 minutes to ride her bike from Sterling to Potomac Falls. It takes her 14 minutes to ride from Potomac Falls to Fairfax. How many minutes will it take her to ride from Sterling to Fairfax if she goes through Potomac Falls?