exam Maths Puzzle Numerical Ability

Use an associative law to find an expression equivalent to r+(s+48)

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exam Other Question

The surface area of a sphere varies directly with the square of its radius. If the surface area of a sphere with a radius of 12 inches if 576 square inches, find the surface area of a sphere with a radius of 3 inches Name the coordinate described here:
From the origin, the point is two places to the left and nine places up.