Exam 2: Polynomial and Rational Functions

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A manufacturer wants to enlarge an existing manufacturing facility such that the total floor area is 1.5 times that of the current facility.The floor area of the current facility is rectangular and measures 290 feet by 80 feet.The manufacturer wants to increase each dimension by the same amount. ​

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Given 3 + i is a root, determine all other roots of f(x) = x5 - 8x4 + 24x3 - 32x2 + 20x.

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The cost C (in millions of dollars) of removing p% of the industrial and municipal pollutants discharged into a river is given by C=255p100p,0p100C = \frac { 255 p } { 100 - p } , 0 \leq p \leq 100 . Select the correct graph of the cost function.

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Use a graphing utility to graph the equation.Use the graph to approximate the values of x that satisfy each inequality. Equation: y=5x2x2+25y = \frac { 5 x ^ { 2 } } { x ^ { 2 } + 25 } Inequality: y2y \leq 2

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Select the correct rational function for the following graph. Select the correct rational function for the following graph.

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Find the zeros of the rational function. f(x)=15x10f ( x ) = 1 - \frac { 5 } { x - 10 }

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Determine the domain of f(x)=6x+6x26xf ( x ) = \frac { 6 x + 6 } { x ^ { 2 } - 6 x } .

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Select the correct graph of the following function. f(x)=5x3x212x+7f ( x ) = 5 x ^ { 3 } - x ^ { 2 } - 12 x + 7

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Find all the real zeros of f(x) = 4x3 - 12x2 - 15x - 4.

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Find vertical and horizontal asymptotes. f(x)=1x7f ( x ) = \frac { 1 } { x - 7 }

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Use a graphing utility to graph the equation.Use the graph to approximate the values of x that satisfy each inequality. Equation: y=6(x6)x+5y = \frac { 6 ( x - 6 ) } { x + 5 } Inequality: y0y \leq 0

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Select the correct graph of the functions f and g which shows the right-hand and left-hand behaviors of f and g appear identical. f(x)=(4x43x3+16x)f ( x ) = - \left( 4 x ^ { 4 } - 3 x ^ { 3 } + 16 x \right) , g(x)=4x4g ( x ) = - 4 x ^ { 4 }

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Find the domain of the function and identify any vertical and horizontal asymptotes. f(x)=x+4x216f ( x ) = \frac { x + 4 } { x ^ { 2 } - 16 }

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Solve the inequality and graph the solution on the real number line. x2+3x>4x ^ { 2 } + 3 x > 4

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Describe the right-hand and the left-hand behavior of the graph of q(x)=5x4+12x3+13q ( x ) = - 5 x ^ { 4 } + 12 x ^ { 3 } + 13 .

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Find all the zeros of the function. ​ (t - 4)(t - 3)(t - 6i)(t + 6i) ​

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Write the complex conjugate of the complex number.Then multiply the number by its complex conjugate. 39\sqrt { - 39 }

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If x=6x = \sqrt { 6 } is a root of x3+5x26x30=0x ^ { 3 } + 5 x ^ { 2 } - 6 x - 30 = 0 , use synthetic division to factor the polynomial completely and list all real solutions of the equation.

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The total revenue R earned (in thousands of dollars) from manufacturing handheld video games is given by R(p)=25p2+1900pR ( p ) = - 25 p ^ { 2 } + 1900 p Where p is the price per unit (in dollars). Find the unit price that will yield a maximum revenue.

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A farmer has 216 feet of fencing and wants to build two identical pens for his prize-winning pigs.The pens will be arranged as shown.Determine the dimensions of a pen that will maximize its area. A farmer has 216 feet of fencing and wants to build two identical pens for his prize-winning pigs.The pens will be arranged as shown.Determine the dimensions of a pen that will maximize its area.

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