Homework Help: calculus

Posted by jared on Friday, November 5, 2010 at 10:36am.

a suspenion bridge is in a shape of a parabola and has a length of 3000 feet between the uprights. the roadbed is 50 feet above the river and the lowest point of the curved cable is 25 feet above the road. if the height is 450 feet, how long is the vertical support cable that is located halfway between an upright and the center of the bridge?

calculus - bobpursley, Friday, November 5, 2010 at 11:37am
y=a(x-1500)^2+b is the form of the equation.
you need to solve for a, b. Well, you know immediately that at x=1500, b has to be 25
Now, at x=0, you know y=450. Solve for a.

Now, with a,b solve for y when x=750

What is the calculus in this?

Answer this Question

Related Questions

Algebra II - I'm confused.. 1. The cables of a suspension bridge are in the ...
Trig - A bridge is built in the shape of a parabolic arch. The bridge has a span...
Geometry (immediate help and explanation) - A bridge is the shape of an arc of a...
Physics - Find the length of a bridge if it is known that the steel in the ...
statistics - Given the length an athlete throws a hammer is a normal random ...
Math - The separation between goalpost uprights in college football changed from...
math - In 1991, the separation between goalpost uprights in college football ...
math - McDougal's Restaurant has a play area for children under and around ...
math - The longest steel arch bridge is the new river gorge near fayetteville,...
Geometry - A sandpit in the shape of a rectangular prism has length 7 feet, ...

For Further Reading

First Name:
School Subject:
Answer: