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DETAILS MY NOTES OSCOLALG1 2.5 .288 . The cost function for a certain company is \( C=40 x+500 \) and the revenue is given by \( R=100 x-0.5 x^{2} \). Recall that profit is revenue minus cost. Set up a quadratic equation and find two values of \( x \) (production level) that will create a profit of \( \$ 500 \). \( x=\square \)

Ask by Cummings Marsh. in the United States
Mar 10,2025

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To find the production levels that result in a profit of $500, set up the profit equation: \[ -0.5x^2 + 60x - 1000 = 0 \] Solving this quadratic equation gives \( x = 20 \) and \( x = 100 \). Therefore, the production levels are \( x = 20 \) and \( x = 100 \).

Solución

To find the values of \( x \) that will create a profit of $500, we need to set up a quadratic equation based on the profit function. The profit function is given by the difference between the revenue and the cost: \[ \text{Profit} = \text{Revenue} - \text{Cost} \] Given: - Cost function: \( C = 40x + 500 \) - Revenue function: \( R = 100x - 0.5x^2 \) The profit function is: \[ \text{Profit} = R - C = (100x - 0.5x^2) - (40x + 500) \] Simplifying the profit function: \[ \text{Profit} = 100x - 0.5x^2 - 40x - 500 \] \[ \text{Profit} = -0.5x^2 + 60x - 500 \] To find the values of \( x \) that will create a profit of $500, we set the profit function equal to $500 and solve for \( x \): \[ -0.5x^2 + 60x - 500 = 500 \] \[ -0.5x^2 + 60x - 1000 = 0 \] Now, we have a quadratic equation in the form \( ax^2 + bx + c = 0 \), where \( a = -0.5 \), \( b = 60 \), and \( c = -1000 \). We can solve this quadratic equation to find the values of \( x \) that will create a profit of $500. Solve the quadratic equation by following steps: - step0: Solve by factoring: \(-0.5x^{2}+60x-1000=0\) - step1: Calculate: \(-\frac{1}{2}x^{2}+60x-1000=0\) - step2: Factor the expression: \(\frac{1}{2}\left(-x+100\right)\left(x-20\right)=0\) - step3: Divide the terms: \(\left(-x+100\right)\left(x-20\right)=0\) - step4: Separate into possible cases: \(\begin{align}&-x+100=0\\&x-20=0\end{align}\) - step5: Solve the equation: \(\begin{align}&x=100\\&x=20\end{align}\) - step6: Rewrite: \(x_{1}=20,x_{2}=100\) The values of \( x \) that will create a profit of $500 are \( x = 20 \) and \( x = 100 \).

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Beyond the Answer

To find the production levels that yield a profit of $500, we first set up the profit function \( P(x) = R(x) - C(x) \). From the given equations, this becomes: \[ P(x) = (100x - 0.5x^2) - (40x + 500) = 60x - 0.5x^2 - 500 \] Setting the profit to $500: \[ 60x - 0.5x^2 - 500 = 500 \] This simplifies to: \[ -0.5x^2 + 60x - 1000 = 0 \] Multiplying through by -2 to eliminate the fraction results in: \[ x^2 - 120x + 2000 = 0 \] Now, use the quadratic formula \( x = \frac{-b \pm \sqrt{b^2 - 4ac}}{2a} \) where \( a = 1, b = -120, c = 2000 \): Calculating the discriminant: \[ b^2 - 4ac = (-120)^2 - 4 \times 1 \times 2000 = 14400 - 8000 = 6400 \] Thus, \( x = \frac{120 \pm \sqrt{6400}}{2} \): \[ x = \frac{120 \pm 80}{2} \] This gives us two solutions: 1. \( x = \frac{200}{2} = 100 \) 2. \( x = \frac{40}{2} = 20 \) So, the production levels that create a profit of $500 are: \( x = 100 \) and \( x = 20 \).

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