Exam 2: Polynomial, Power, and Rational Functions

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Solve the polynomial inequality. - x4−6x3−60x2+152x+480≤0x ^ { 4 } - 6 x ^ { 3 } - 60 x ^ { 2 } + 152 x + 480 \leq 0

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Determine if the function is a monomial function (given that c and k represent constants). If it is, state the degree and leading coefficient. - f(x)=2⋅x−3f ( x ) = 2 \cdot x ^ { - 3 }

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Match the graph of the rational function with its equation. -Match the graph of the rational function with its equation. -

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Evaluate the limit based on the graph of f shown. - Evaluate the limit based on the graph of f shown. -   \lim _ { x \rightarrow ^ { + } } f ( x ) lim⁡x→+f(x)\lim _ { x \rightarrow ^ { + } } f ( x )

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Write the function as a product of linear and irreducible quadratic factors, all with real coefficients. - f(x)=x4−12x3+36x2−12x+35f ( x ) = x ^ { 4 } - 12 x ^ { 3 } + 36 x ^ { 2 } - 12 x + 35

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Write the statement as a power function equation. Use k as the constant of variation. -John kept track of the time it took him to drive to college from his home and the speed at which he drove. He found that the time tt varies inversely as the speed rr .

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Determine the x values that cause the function to be (a) zero, (b) undefined, (c) positive, and (d) negative. - f(x)=(2x−9)(x+3)x+4f ( x ) = \frac { ( 2 x - 9 ) ( x + 3 ) } { x + 4 }

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Describe the strength and direction of the linear correlation. -Describe the strength and direction of the linear correlation. -

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Graph the function. - P(x)=(−3x−1)(x+1)(x+2)P ( x ) = ( - 3 x - 1 ) ( x + 1 ) ( x + 2 )  Graph the function. - P ( x ) = ( - 3 x - 1 ) ( x + 1 ) ( x + 2 )

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Solve the problem. -The number of mosquitoes M(x)\mathrm { M } ( \mathrm { x } ) , in millions, in a certain area depends on the June rainfall xx , in inches: M(x)=\mathrm { M } ( \mathrm { x } ) = 14x−x214 x - x ^ { 2 } . What rainfall produces the maximum number of mosquitoes?

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For the given function, find all asymptotes of the type indicated (if there are any) - f(x)=x−1x2+8f ( x ) = \frac { x - 1 } { x ^ { 2 } + 8 } , vertical

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Describe the strength and direction of the linear correlation. -Describe the strength and direction of the linear correlation. -

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List the x- and y-intercepts, and graph the function. - f(x)=x2−x−6x+4f ( x ) = \frac { x ^ { 2 } - x - 6 } { x + 4 }  List the x- and y-intercepts, and graph the function. - f ( x ) = \frac { x ^ { 2 } - x - 6 } { x + 4 }

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Solve the problem. -Suppose a cost-benefit model is given by y=3.6x100−xy = \frac { 3.6 x } { 100 - x } , where yy is the cost in thousands of dollars for removing xx percent of a given pollutant. Find the cost of removing 90%90 \% to the nearest dollar.

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Find the remainder when f(x) is divided by (x - k) - f(x)=4x3−7x2−3x+5;k=−2f ( x ) = 4 x ^ { 3 } - 7 x ^ { 2 } - 3 x + 5 ; k = - 2

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State the domain of the rational function. - f(x)=(x−8)(x+6)x2−4f ( x ) = \frac { ( x - 8 ) ( x + 6 ) } { x ^ { 2 } - 4 }

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Solve the problem. -A projectile is thrown upward so that its distance above the ground after tt seconds is h=−16t2+640th = - 16 t ^ { 2 } + 640 t After how many seconds does it reach its maximum height?

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Find the zeros of the function. - f(x)=x2−2x−15f ( x ) = x ^ { 2 } - 2 x - 15

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Solve the problem. -A plane suddenly experiences turbulence while in flight. At this point the change in its altitude, in feet, is represt the following function of time: F(t)=5(t−10)2−1920(t−10)2−10(t−10)+16F ( t ) = \frac { 5 ( t - 10 ) ^ { 2 } - 19 } { 20 ( t - 10 ) ^ { 2 } - 10 ( t - 10 ) + 16 } Assuming that the turbulence first hits at time t=0t = 0 , what is the maximum relative drop the plane will experienc due to turbulence? (Round the result to the nearest hundredth.)

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Describe how the graph of the given function can be obtained by transforming the graph of the reciprocal function f(x) = 1/x. - f(x)=1−7xx+3f ( x ) = \frac { 1 - 7 x } { x + 3 }

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