Exam 3: Polynomial and Rational Functions

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Graph the parabola and the axis of symmetry. Label the coordinates of the vertex, and write the equation of the axis of symmetry. - y=(x5)2+2y = - ( x - 5 ) ^ { 2 } + 2

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Write the word or phrase that best completes each statement or answers the question. Provide the missing information. -The amount of a person's paycheck varies as the number of hours worked.

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a. Identify the horizontal asymptote (if any). b. If the graph of the function has a horizontal asymptote, determine the point where the graph crosses the horizontal asymptote. - f(x)=x27x2+18x+7f ( x ) = \frac { x ^ { 2 } - 7 x ^ { 2 } + 1 } { 8 x + 7 }

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Solve the problem. -The area of a picture projected on a wall varies directly as the square of the distance from the projector to the wall. a. If a 12ft12 - \mathrm { ft } distance produces a 81ft281 \mathrm { ft } ^ { 2 } picture, what is the area of the picture when the projection unit is moved to a distance of 16ft16 \mathrm { ft } from the wall? b. If the projected image is 324ft2324 \mathrm { ft } ^ { 2 } , how far is the projector from the wall?

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Determine the x- and y-intercepts for the given function. - f(x)=(x2)24f ( x ) = - ( x - 2 ) ^ { 2 } - 4

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Find the constant of variation k. - NN varies jointly as tt and pp . When tt is 6 and pp is 3,N3 , N is 36 .

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Find the value of b that gives the function the given maximum value. - f(x)=x2+bx+2;f ( x ) = - x ^ { 2 } + b x + 2 ; maximum value 6

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Choose the one alternative that best completes the statement or answers the question. The graph of y = f (x) is given. Solve the inequality. - f(x)<0f ( x ) < 0  Choose the one alternative that best completes the statement or answers the question. The graph of y = f (x) is given. Solve the inequality. - f ( x ) < 0

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Graph the function by using transformations of the graph of y=1x2y = \frac { 1 } { x ^ { 2 } } - m(x)=1x2+1m ( x ) = \frac { 1 } { x ^ { 2 } } + 1

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Solve the problem. -The monthly profit for a small company that makes long-sleeve T-shirts depends on the price per shirt. If the price is too high, sales will drop. If the price is too low, the revenue brought in may not Cover the cost to produce the shirts. After months of data collection, the sales team determines that The monthly profit is approximated by f(p)=33p2+1,254p10,763f ( p ) = - 33 p ^ { 2 } + 1,254 p - 10,763 , where p is the price per shirt And f p is the monthly profit based on that price. Find the price that generates the maximum profit And find the maximum profit.

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Write the word or phrase that best completes each statement or answers the question. Provide the missing information. -The of a polynomial f (x) are the solutions (or roots) of the equation f (x) = 0.

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a. Identify the horizontal asymptote (if any). b. If the graph of the function has a horizontal asymptote, determine the point where the graph crosses the horizontal asymptote. - s(x)=5x10x2+5x4s ( x ) = \frac { 5 x - 10 } { x ^ { 2 } + 5 x - 4 }

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Choose the one alternative that best completes the statement or answers the question. Determine the end behavior of the graph of the function. - f(x)=8x6+3x5+3x4+7f ( x ) = 8 x ^ { 6 } + 3 x ^ { 5 } + 3 x ^ { 4 } + 7

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Solve the problem. -The strength of a wooden beam varies jointly as the width of the beam and the square of the thickness of the beam, and inversely as the length of the beam. A beam that is 48 in. long, 6 in. wide, and 4 in. thick can support a load of 1,668lb1,668 \mathrm { lb } . Find the maximum load that can be safely supported by a board that is 8in8 \mathrm { in } . wide, 120in120 \mathrm { in } . long, and 5 in. thick.

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Write the word or phrase that best completes each statement or answers the question. Provide the missing information. -A student's grade on a test varies as the number of hours the student spends studying for the test.

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Write the word or phrase that best completes each statement or answers the question. Provide the missing information. -If 5\sqrt { 5 } is a zero of a polynomial, then ( (x5)( x - \sqrt { 5 } ) ) is a factor of the polynomial.

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Write a polynomial f (x) that meets the given conditions. -Polynomial of lowest degree with zeros of 2- 2 (multiplicity 2 ) and 3 (multiplicity 2 ) and with f(0)=108f ( 0 ) = - 108

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Identify the asymptotes. - f(x)=2x2+7xf ( x ) = \frac { 2 x ^ { 2 } + 7 } { x }

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Solve the problem. -An automobile manufacturer can produce up to 300 cars per day. The profit made from the sale of these vehicles can be modeled by the function P(x)=10x2+1,900x34,000P ( x ) = - 10 x ^ { 2 } + 1,900 x - 34,000 where P(x) is the Profit in dollars and x is the number of automobiles made and sold. How many cars should be made And sold to maximize profit?

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Solve the problem. -Use synthetic division and the remainder theorem to determine if [x(32i)][ x - ( 3 - 2 i ) ] is a factor of f(x)=x26x+13f ( x ) = x ^ { 2 } - 6 x + 13

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