exam Maths Puzzle Numerical Ability

Please help me simplify: (- 2a2b3 )2 / ( 2a2b)3

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exam Other Question

Find the volume of material that is needed to form a spherical shell whose outer radius is 6.0 inches and whose thickness is 0.01 inches. Use your answer to estimate the surface area of the 6-inch sphere. w=-14&w+8=-6