The number of gallons of coffee a mathematician drinks on any given day is inversely proportional to how much sleep he gets the
night before. On Monday, he got 9 hours of sleep and drank 2 gallons of coffee. On Tuesday, he got 6 hours of sleep. How many gallons of coffee did he drink?
1 answer:
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Answer: A, because the equation of a circle is . So, if the point of the center is
and the radius
, then on the equation should be changed as negative and the radius should be multiplied as
, which is