Engineers built an arch bridge across a river. The arch bridge makes a parabola shape that has the equation y=-0.1(x – 5)2


Engineers built an arch bridge across a river. The arch bridge
makes a parabola shape that has the equation
y=-0.1(x – 5)2 + 12, where x and y are measured in
meters. If the bridge makes contact with both banks at a height
of 4 meters, how long is the distance between the two banks
of the river where the bridge is? Round your answer to the
nearest whole number.


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