Which algebraic expression means "three more than a number squared"?

a) 2n+3

b) 2n-3

c) n^2+3

d) n^2-3

5,878 rounded to the nearest thousand

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Solve 10 6 (-9 - 4x) = 10 (x - 12) 8.

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Rewrite as a simplified fraction. 0.2 = ?

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A circle with radius of 6cm sits inside a circle with a radius of 9cm. What is the area of the shaded region?