A circular disk radius r is cut out from a square of cardboard. Express the area of wasted material as a function of radius.
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Answer:
0.86r^2
Step-by-step explanation:
area of circular disc = πr^2
area of cardboard=(2r)^2 = 4r^2
(side of square = diameter of cardboard)
Area of waste waste material=( 4r^2) - (3.14r^2)
= 0.86r^2
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