Notice how all the compound units have one thing in common: they are all per square inch or /m 2 or /cm 2. All are saying "per unit area" and so the calculation will always involve dividing by the ...

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Thank you for signing up! Did you know with an ad-lite subscription to Milton Keynes Citizen, you get 70% fewer ads while viewing the news that matters to you. Mathematics is a required GCSE, meaning ...