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Physics question (density, buoyancy)

In order to make air float, which of the following needs to be done?Does it’s density need to be made smaller, does it need to be heated, does its volume need to be increased, or does any of the... more

College Algebra Word Problem

A concrete walk of uniform width is to be laid around a rectangular flower bed that is 60 feet long and 30 feet wide. If the area of the walk is to be 279 square feet, what is the width of the walk. 


Math help please?

72 more females than males are at a gathering. 60% of the students are female. What is the number of male students that are at the gathering?

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