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Mathematics, 20.09.2019 18:30 rexcapacitor

The expression πr² is used to determine the area of a circle, where r is the length of the radius. what does the expression π(5b)² represent?
a) the area of a circle with radius 5
b) the area of a circle with radius 25
c) the area of a circle with radius 5b
d) the area of a circle with radius 25b²

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