11-05-2016
Mathematics

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what is the area of the top surface of a circular manhole cover that has a radius of 30 centimeters rounded to the nearest tenth

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11-05-2016

area=pir^2

r=30
pi aprox=3.141592

aresa=3.141592*30^2
area=3.141592 times 900
aera=2827.43
area=2827.4 cm^2

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