exam Maths Puzzle Numerical Ability

The length of a rectangular piece of sheet steel is 2 in longer than the width. Find the exact dimensions if the area of the sheet is 168 sq. in.

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Samuel invested a portion of $15,000 in a savings account paying 5 percent annual interest and the reaminder in a time deposit paying 7 percent. If his annual interest from the ti Use the remainder theorem to evaluate the function at x=3.
F(x)=4x^3-5x^2+7x+2