Mathematics - 23 August 2006

a suspension bridge w/ weight uniformly distributed along its length has twin towers that extend 75 m above the road surface and are 400 meters apart. the cables are parabolic in shape and are suspended from the tops of the towers. the cables touch the road surface at the center of the bridge. what is the height of the cables at a point 100 m from the center? (assuming that the road is level)

thanks for the help.

2006-08-23 16:23:42 · 2 answers · asked by shih rips 6

the u.s.s. independence maintains a constant speed of 10 knots heading due north. at 4 pm the ship's radar detects a destroyer 100 nautical mi due east of the carrier. if the destroyer is heading due west at 20 knots, when will the 2 ships be the closest?
(1 knot = 1 nautical mi/hr)

thanks for the help.

2006-08-23 16:20:11 · 2 answers · asked by shih rips 6

Ok, use Distance formula to find out if pq and qr are congruent. (PQ and QR being line segments.)

P = (4, -4)
Q = (1, -6)
R = (-1, -3)

I got PQ = sqrt 5 and QR = sqrt 1 or 1.

I have the distance formula, but I can't figure out why it's not working. I graphed these, and it's clearly not the correct answers that I have. Help with this and I promise to ask my Geometry teacher. I think I copied the formula wrong.

2006-08-23 16:17:24 · 5 answers · asked by Anonymous

2006-08-23 16:14:55 · 7 answers · asked by bmorris48 1

Math question

2006-08-23 16:12:53 · 4 answers · asked by Nicholas N 1

Can someone provide answers and explanation?

2006-08-23 16:02:55 · 4 answers · asked by x_expired.jello_x 1

2006-08-23 15:38:57 · 19 answers · asked by taylor e 1

1. there are 15 poles at equal distance beside the railway track. if a train moves from 1st pole to 10th pole in 10 minutes. how much time it will take to touch 15th pole?

2. a cow was standing on a bridge. 5 feet away from the middle of the bridge. suddenly a lightning express with 90 miles/hr was coming towards the bridge from nearest end of the cow. seeing this the cow ran towards the express and managed to escape when the train is one feet away from the bridge. if it would have ran to opposite direction(ie away from train) it would have been hit the train one ft away from the end of the bridge. calculate the length of bridge.?

can u solve these puzzles tell the answer and the steps of the problems. plz solve it soon its urgent

2006-08-23 15:36:35 · 15 answers · asked by george 4

answer this question

2006-08-23 15:02:21 · 20 answers · asked by Anonymous

2006-08-23 14:55:41 · 6 answers · asked by Micheline 1

2006-08-23 14:53:56 · 4 answers · asked by Anonymous

2006-08-23 14:44:15 · 4 answers · asked by Anonymous

2006-08-23 14:43:31 · 3 answers · asked by Amanda P 4

show work plz

2006-08-23 14:32:38 · 9 answers · asked by Anonymous

2006-08-23 14:29:09 · 15 answers · asked by HaSteTHedayIShARdCore 1

i want to know all of the metric prefixes- i know these:
Kilo-1000
Hecto-100
Deko-10
Base-1
Deca- 1/10
Centi- 1/100
Milli- 1/1000.

i want to know ALL of them.
plz?

2006-08-23 14:13:41 · 5 answers · asked by Anonymous

If one baseball player is batting 1-4 and another is also batting 1-4. Thats .200. So how come the probability of one of them getting a hit is .250 (2/8).

2006-08-23 14:03:25 · 3 answers · asked by Anonymous

The problem reads: a) Let An be the area of a polygon with n equal sides inscribed in a circle with radius r. By dividing the polygon into n congruent triangles with central angle 2pi/n, show that An = 1/2nr^2(sin 2pi/n). b) Show that lim as n approaches infinity = An = r^2 pi.

Thank you so much for your help. I have no idea how to work this problem. I am totally stumped!!!

2006-08-23 13:49:03 · 4 answers · asked by Ϡ 3

show work plz

2006-08-23 13:42:28 · 13 answers · asked by mike k 1

i need to know how to work this out by hand and on a calculator if posssible.

2006-08-23 13:38:56 · 15 answers · asked by martica522 1

The measure of the supplement of an angle is 60 less than three times the measure of the complement of the angle. Find the measure of the angle.
*** supplement= 180 degrees
***complement= 90 degrees
Also please explain the best you can...I have to show work!! Thanks!!!

2006-08-23 13:30:31 · 4 answers · asked by dolly_lama 1

2006-08-23 13:18:59 · 34 answers · asked by Melissa B 1

The point P(1,1/2) lies on the curve y=x/(1+x). If Q is the point (x , x/(1+x), how do you find slope of the secant line PQ if the values are

(1) 0.5
(2) 0.99
(3) 0.9
(4) 0.999

2006-08-23 12:59:11 · 4 answers · asked by buttrefly007 1

1 - Solve the following equation for y in terms of x.
10x + 5y = 20
2 - Solve the following equation for x in terms of y.
7x - 2y = 21
3 - Tina mixes pretzels that sell for $2.00 a pound with cereal that sells for $3.00 a pound. She wants to make an 8 pound mixture to sell for $2.50. How many pounds of each sould Tina use?
10 points for BEST ANSWER Thank you.

2006-08-23 12:51:34 · 16 answers · asked by Anonymous

2006-08-23 12:36:18 · 27 answers · asked by dave c 2

We all have 2 parents 4 grand parents 8 great grand parents and so on. If we assume 30 years per generation then 1000 years is approx. 30 generations. The answer you get is way to high. What is wrong?

2006-08-23 12:30:08 · 4 answers · asked by Rolf H 2

What do you use fractions for in those jobs?

2006-08-23 12:21:56 · 8 answers · asked by Anonymous

Is it impossible to make a figure with a perimeter of 30 and an area of 9?

2006-08-23 12:19:22 · 10 answers · asked by Anonymous

If you had to think about this one, you need to get more sleep.

2006-08-23 12:15:50 · 7 answers · asked by Raptor 3

Please help me!
Explain them!Why the result always is 10.00$
Choose 2 unique digits (1-9) to form an amount (in dollars and cents)less n 10.00$
Reverse the digits in this amount
Take difference between these two amounts
Now reverse the digits in the difference
Add these last two amounts together .
Now U have your answer is 10.89$
Please help me explain it!

2006-08-23 12:14:35 · 6 answers · asked by canon90 2