The Gateway Arch in St. Louis, Missouri, has
a shape similar to that of a parabola. The
edge of the arch can be modeled by

h=-2/317x^2+88/21x-875/7

where x and h are measured in feet.
How high is the arch?
Answer in units of ft

Question

The Gateway Arch in St. Louis, Missouri, has
a shape similar to that of a parabola. The
edge of the arch can be modeled by

h=-2/317x^2+88/21x-875/7

where x and h are measured in feet.
How high is the arch?
Answer in units of ft

anonymous · Answer

they are asking for the second coordinate of the vertex

anonymous · Answer

the first coordinate is $-\frac{b}{2a}$ you need a calculator i think

anonymous · Answer

I know you use that formula to find the axis of symmetry which is the x value of the vertex

anonymous · Answer

Which number do i plug into that formula

anonymous · Answer

@satellite73

anonymous · Answer

@myininaya @satellite73

anonymous · Answer

@karatechopper

anonymous · Answer

$$a=-\frac{2}{317}, b=\frac{88}{21}$$

anonymous · Answer

For the vertex I got (332.1,570.8)

anonymous · Answer

Am I right ?

anonymous · Answer

I got the answer 570.8

anonymous · Answer

It was right :)