exam Maths Puzzle Numerical Ability

A rectangular lot measures 66m by 107m A sidewalk surrounds the lot The sidewalk is 2m wide what would the area of the sidewalk be

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p=1000 sqrt t+p = 2567 t = 0, t = 1, t = 2, t = 3, t = 6.
suppose instead that the town experiences growth that can be modeled by the following: p = 1000 sqrt t + p p be Mrs. Jones invested a total of $12,000, part at 10% and the rest at 5%. If the income from her 10% investment was 6 times as great as the income from 5% investment, how much was invested at each rate?