The graph of f (x) = -0.01x² + x can be used to model the height in feet of a
curved arch support for a bridge, where the x-axis represents the water level and x
represents the distance in feet from where the arch support enters the water. Find the height of the highest point of the bridge.

Respuesta :

Answer: 25 feet.

Step-by-step explanation:

The height of the highest point is the y-coordinate of the vertex parabola. You can follow these steps:

1, Find the x-coordinate of the vertex with the following formula:

[tex]x=\frac{-b}{2a}[/tex]

In this case, you can identify that:

[tex]a= -0.01\\\\b=1[/tex]

2. Knowing these values you can substitute them into the formula and then evaluate:

[tex]x=\frac{-1}{(2)(-0.01)}\\\\x=50[/tex]

3. Rewrite the function as:

[tex]y= -0.01x^2 + x[/tex]

4. Substitute the value of "x" into the function  and evaluate:

 [tex]y= -0.01(50)^2 + 50\\\\y=25[/tex]

Therefore, the height of the highest point of the bridge is 25 feet.