The underneath side of the bridge is an arch that can be modeled with the function y = -0.000495x 2 + 0.619x.How high above the river is the bridge?

Question

Basically I need to find the vertex.

Answer 1

y = -0.000495x² + 0.619x

y = -0.000495(x² - 125x + (125/2)²) + (0.000495)(15625/4)

y = -0.000495(x - (125/2))² + (0.000495)(15625/4)

 

vertex = (-125/2 , 1.93)

 

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