Ensuring that children consume less sugar is among the most effective ways to curb childhood obesity. Recently, with this goal in mind, school officials have begun to replace high calorie sugary drinks in school vending machines with bottled water, unsweetened fruit juices, and sugar free sodas. Si...

The Marsden family is traveling through Europe on vacation and has two days to spend in Barcelona. While planning the daily activities, each family member has fairly strong preferences. Little brother asked to go to the beach at least one of the days, but cannot walk for more than 4 hours during a d...