A circle has a radius of 7 cm. Workout the area of the circle. Give your answer correct to three significant figures.
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12. 
r - 3 = 4(-5)
r - 3 = -20
r = -20 + 3
r = -17
13.
6(r - 2) = -7(5)
6r - 12 = -35
6r = -35 + 12
6r = - 23
r =
r - 3 = 4(-5)
r - 3 = -20
r = -20 + 3
r = -17
13.
6(r - 2) = -7(5)
6r - 12 = -35
6r = -35 + 12
6r = - 23
r =