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I need help on my math homework. WILL AWARD BEST ANSWER!!!!!?

I am doing a math project involving several functions. I need a real world application ( word problem involving daily life ) that uses all of these 5 functions: 1.Absolute Value Function: y=|x| 2.Quadratic Function: y=x^2 3.Square Root Function: y=√x 4.Cubic Function: y=x^3 5.Cosine Function: y=cos(x) help would be greatly appreciated, and again to the first one to answer correctly i WILL AWARD BEST ANSWER immediately following the correct answer. thanks! again these need to be WORD problems, i can't get a word problem from a calculator. Intelligent answers only please?

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1. 1. 2. A square field has all 4 sides x meters long. what is the area of the field (y). 3. the area of a square field is y metres squared. What is the length of each side x? 4. The volume of a square carton with side x is y 5. A 1 metre rope is tied to the top of a tent post and pegged into the ground. The rope forms an angle of x with the ground. What is the distance y from the tent peg to the base of the tent pole? Cos x =y/1, y = Cos x