book Maths Puzzle Numerical Ability

7X(1-X)= 5(X-2)

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two fifths the cube of a number. Mephis, Tennessee, is growing ata rate of 0.36% per year. Find how long, to the nearest tenth of a year it will take an initial population of 650,000 to increase to 700,000. Use the population growth formula y= y0e^kt