exam Maths Puzzle Numerical Ability

Your parents purchased a house for $120,000. After 22 years the house had doubled in value. What was the simple interest rate that could generate this return on their investment?

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exam Other Question

The area of a rectangle is 154 sq. Ft. If its width is 3 ft. less than its length what are its dimensions? I need to use a quadratic formula to solve it.

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Tutors please help me????

Use the rational zeros theorem to list all possible rational zeros of
P(x)=3x^3-5x^2+4x-2