exam Maths Puzzle Numerical Ability

the following formula gives the monthly cost M

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How do you find a quadratic equation if you are only give the solution? Is it possible to have different quadratic equations with the same solution? Explain. give an example.

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ts If the amount of mercury in a polluted lake is 0.40 HG/mL, what is the total mass of mercury in kilograms in the lake. The lake has a surface area of 25 square miles and an average