exam Maths Puzzle Numerical Ability

A circular cake of radius 1 dm is cut into 8 equal sectors. What is the area of each sector?

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exam Other Question

I need help on a particular problem, number 6 and possibly number 8

on the Chapter 3 Assesstment
please help solve

(2m^2p^3)^2 (4m^2p)^-2 / (-3mp^4)^-1 (2m^3p^4)^3