Exam 3: Polynomial and Rational Functions

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Solve the inequality. Write the solution set in interval notation. - 9hh1>7\frac { 9 h } { h - 1 } > - 7

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Solve the problem. -A fireworks mortar is launched straight upward from a pool deck platform 4 m off the ground at an initial velocity of 61 m/sec. The height of the mortar can be modeled by h(t)=4.9t2+61t+4h ( t ) = - 4.9 t ^ { 2 } + 61 t + 4 where h(t) is the height in meters and t is the time in seconds after launch. What is the maximum Height? Round to the nearest meter.

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Write the domain in interval notation and identify any vertical asymptotes. - f(x)=2x4x2+5x14f ( x ) = \frac { 2 x - 4 } { x ^ { 2 } + 5 x - 14 }  Write the domain in interval notation and identify any vertical asymptotes. - f ( x ) = \frac { 2 x - 4 } { x ^ { 2 } + 5 x - 14 }

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Write the word or phrase that best completes each statement or answers the question. Provide the missing information. -If c is a real zero of a polynomial function and the multiplicity is 3, does the graph of the function cross the x-axis or touch the x-axis (without crossing) at (c, 0)?

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Solve the problem. -An on-demand printing company has monthly overhead costs of $1,900 in rent, $450 in electricity, $80 for phone service, and $230 for advertising and marketing. The printing cost is $40 per Thousand pages for paper and ink. The average cost for printing x thousand pages can be represented by The function Cˉ(x)=2,660+40xx\bar { C } ( x ) = \frac { 2,660 + 40 x } { x } For a given month, if the printing company could print an unlimited number of pages, what value would the Average cost per thousand pages approach? What does this mean in the context of the problem?

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Solve the problem. -Factor f(x)=3x32x253x60f ( x ) = 3 x ^ { 3 } - 2 x ^ { 2 } - 53 x - 60 given that 3- 3 is a zero.

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Find all the zeros. - f(x)=3x35x218x+30f ( x ) = 3 x ^ { 3 } - 5 x ^ { 2 } - 18 x + 30

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Write the word or phrase that best completes each statement or answers the question. Provide the missing information. -An odd function is symmetric with respect to the .

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Solve the problem. -Given f(x)=2x3+7x2+14x9f ( x ) = 2 x ^ { 3 } + 7 x ^ { 2 } + 14 x - 9 . Use the intermediate value theorem to determine whether f (x) has a zero on the interval [0, 1], find the zero if it exists.

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Find the vertex of the parabola by applying the vertex formula. - P(x)=1.4x2+1.3x5.1P ( x ) = 1.4 x ^ { 2 } + 1.3 x - 5.1

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Use synthetic division to divide the polynomials. - (s4+5s3+2s217s+7)÷(s1)\left( s ^ { 4 } + 5 s ^ { 3 } + 2 s ^ { 2 } - 17 s + 7 \right) \div ( s - 1 )

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Sketch the function. - m(x)=25x525x49x3+9x2m ( x ) = 25 x ^ { 5 } - 25 x ^ { 4 } - 9 x ^ { 3 } + 9 x ^ { 2 }

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Find the zeros and their multiplicities. Consider using Descartes' rule of signs and the upper and lower bound theorem to limit your search for rational zeros. - f(x)=x9+10x8+27x7+20x6+50x5f ( x ) = x ^ { 9 } + 10 x ^ { 8 } + 27 x ^ { 7 } + 20 x ^ { 6 } + 50 x ^ { 5 }

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Solve the problem. -Gas mileage is tested for a car under different driving conditions. At lower speeds, the car is driven in stop and go traffic. At higher speeds, the car must overcome more wind resistance. The variable x Given in the table represents the speed (in mph) for a compact car, and m(x) represents the gas mileage (in mpg). Use regression to find a quadratic function to model the data. x 25 30 35 40 45 50 55 60 65 m(x) 20.7 24.4 27 28.4 28.7 27.8 25.8 22.6 18.3

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Write the domain of the function in interval notation. - h(a)=64a2h ( a ) = \sqrt { 64 - a ^ { 2 } }

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Solve the problem. -The sum of two positive numbers is 26. What two numbers will maximize the product?

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Solve the inequality. Write the solution set in interval notation. - (k8)(k3)(k+5)<0( k - 8 ) ( k - 3 ) ( k + 5 ) < 0

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Find the zeros of the function and state the multiplicities. - f(x)=4x(9x+8)(2x+5)(x+6)(x6)f ( x ) = 4 x ( 9 x + 8 ) ( 2 x + 5 ) ( x + \sqrt { 6 } ) ( x - \sqrt { 6 } )

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Write the word or phrase that best completes each statement or answers the question. Provide the missing information. -If f (x) is a polynomial of degree n1n \geq 1 1 with complex coefficients, then f (x) has exactly complex zeros, provided that each zero is counted by its multiplicity.

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Solve the problem. -A sports trainer has monthly costs of $50.51 for phone service and $43.53 for his website and advertising. In addition he pays a $10 fee to the gym for each session in which he trains a client. His Monthly costs can be represented by the function C(x)=94.04+10xC ( x ) = 94.04 + 10 x where x is the number of training sessions. Write a function representing the average cost Cˉ(x)\bar { C } ( x ) for x Sessions.

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