exam Maths Puzzle Numerical Ability

8.5 times 10times the power of 3=
8.5x10^3

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exam Other Question

If I invest $18,750 in two different accounts and one account earns 12% interest and the other earns 10% interest, and at the end of the year have a total $20,867 (original amount + interest), how much did I invest in each account? Write in simplest form. 9-b^2/b^2-b-6