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you arent multiplying 9 by anything this is subtraction question,. Feel free to put 3000 (3 x 10^3) - 900 (9 x 19^2) into your calculator, you will get 2100, or 2.1 x 10 ^3
you arent multiplying 9 by anything this is subtraction question,. Feel free to put 3000 (3 x 10^3) - 900 (9 x 19^2) into your calculator, you will get 2100, or 2.1 x 10 ^3