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Unformatted text preview: cubic feet per minute. Find the rates at which the radius and surface area are changing at the instant when the radius is 20 feet. 26. Find that number which most exceeds its square. 27. Find the points on the curve x 2-y 2 = 1 which are nearest the point ( 2 , 0). 28. A round hole of radius 3 ft is bored through the center of a solid sphere of radius 2 ft. Find the volume cut out....
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