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Mileage cost: \( 150 \times 0.20 = 30 \) dollars.
Total = \( 135 + 30 = 165 \) dollars.
A rectangular field has a length 4 meters more than twice its width. If the area is 104 square meters, what is the width?
Let width = \( w \). Then length = \( 2w + 4 \).
Area: \( w(2w + 4) = 104 \)
Expand: \( 2w^2 + 4w = 104 \)
Divide by 2: \( w^2 + 2w = 52 \)
Bring to standard form: \( w^2 + 2w - 52 = 0 \)
\( w = \frac{-2 \pm \sqrt{2^2 - 4(1)(-52)}}{2} = \frac{-2 \pm \sqrt{4 + 208}}{2} = \frac{-2 \pm \sqrt{212}}{2} \)
\( \sqrt{212} = \sqrt{4 \times 53} = 2\sqrt{53} \approx 2 \times 7.28 = 14.56 \)