A teacher at Freeland elementary school is painting a circle on the playground for children to stand on or sit on for class activities. she wants the circle to accommodate up to 30 children along circumference. she estimates that it will take at least 3 feet of length along the circle for each child. given the estimate, what is the smallest area, in square feet, that this circle could encompass
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The weight v of an object on venus varies directly with its weight e on earth. a person weighing 120 lb on earth would weigh 106 lb on venus. how much would a person weighing 150 lb on earth weigh on venus?

Ascientist has discovered an organism that produces five offspring exactly one hour after its own birth, and then goes on to live for one week without producing any additional offspring. each replicated organism also replicates at the same rate. at hour one, there is one organism. at hour two, there are five more organisms. how many total organisms are there at hour seven? 2,801 19,531 19,607 97.655

Awindow washer cleans 42 windows in 2 hours. at this rate, how many windows did he clean in 180 minutes.