Tuesday

September 2, 2014

September 2, 2014

Posted by **Vanessa** on Sunday, February 3, 2013 at 12:33pm.

h=0.0008d^2-0.384d were h metres represents the height and d metres represents the horizontal distance.

a) What is the vertical distance from the top of a support tower to the lowest point on a cable, to the nearest metre?

b)What is the length of the main span?

c) At a horizontal distance of 50m from one end of the cable, how far is the cable below the top of the support towers, to the nearest metre?

- Grade 10 Math -
**Steve**, Sunday, February 3, 2013 at 2:21pmh = .0008(d^2-480d)

= .0008(d^2-480d+240^2 - 240^2)

= .0008(d-240)^2 - 46.08

So, the vertex is at (240,-46.08)

That means the drop is 46 m

h = .0008d(d-480)

h=0 at d=0,480

The main span is 480 m

h(50) = .0008*50(-430) = -17.2

The point is 17 m below the top

**Answer this Question**

**Related Questions**

8th grade - I need to find the percent of the total area of New York City that ...

trig - The high level bridge, a railway bridge that crosses the Oldman River is ...

Math, Trig - The high level bridge, a railway bridge that crosses the Oldman ...

english-metaphor - All sentences must be properly constructed. Finally, you ...

Math - trigonometry - A bridge is 70m long. From the ends of the bridge the ...

English - Identify the correct sentence. A. Carla went to work at 248 Prospect ...

English - dentify the correct sentence. A. Carla went to work at 248 Prospect ...

math - The longest steel arch bridge is the new river gorge near fayetteville,...

Dog Business - Please check my answer thank you very much for your time Use the ...

Making a business plan - Please check my answer thank you very much Based on the...