book Maths Puzzle Numerical Ability

what is the area of a regular pentagon if its apothem has a length of 4 feet and each side has a length of 5.8feet?

what is the circumference of a circle with a radius f 4.2 inc

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I'm not sure how to divive using long division with polynomials. Could someone help me with this Thanks.
Use long division to reduce (6x^5 - 5x^4 - 6x^3 - 10x^2 + 21x - 9)/(2x - 3 I need to solve this inequality 5 different ways. ax+b<c and x<24. I thought I had it once but can't get it to work now. Help please.