Mathematics - 26 September 2006

A sprinter runs for 24 seconds at a pace of 11 m/s. How far did she run?

2006-09-26 14:27:36 · 10 answers · asked by Helena 1

I don't necessarily need the answer, but I just need to know how to find the answer here.

A car is traveling on a curve that forms a circular arc. The force F needed to keep the car from skidding is jointly proportional to the weight w of the car and the square of its speed s, and is inversely proportional to the radius r of the curve.

A car weighing 1600 lb travels around a curve at 60 mi/h. The next car to round this curve weighs 2500 lb and requires the same force as the first car to keep from skidding. How fast is the second car traveling?

2006-09-26 14:25:02 · 2 answers · asked by James B 1

We assume that Y is a non-empty set and we say that ~ be an equivalence relation on Y. We let W be the set of distinct equivalence classes given by ~. prove that elements of W are disjoint and their union is all of Y.

please help. thank you.

2006-09-26 14:13:36 · 2 answers · asked by David F 2

1.) r=2 5
(over) = (over)
7 7
2.) x-1 2
(over) = (over)
-4 3

solve these please

2006-09-26 14:12:54 · 6 answers · asked by horses4life 1

2006-09-26 14:08:53 · 7 answers · asked by mysol v 1

One name is drawn and replaced. A second name is drawn. What is the probability that both named drawn are girls' names?
A. 1/78
B. 42/121
C. 49/121
D. 49/16

Can someone explain how to get an equation out of all the mumbo jumbo? :S

2006-09-26 13:59:30 · 8 answers · asked by Madcat 2

What are the three consecutive odd integers such that three times the first plus four times the second minus the third is 202.

2006-09-26 13:47:52 · 10 answers · asked by Anonymous

2006-09-26 13:42:33 · 5 answers · asked by cookie_20042005 1

2006-09-26 13:40:36 · 9 answers · asked by isabelli96 2

Say you have a problem like..

3x+2=y
2x+11y=3

Now i know you need to get the variables lined up in order to do that. Now would it be just the same thing like switching the variables and keeping the signs? or would you be changing the sings.. This is what i did.. let me know if im right.

3x+y=2
2x+11y=3

Or would it be something like...

3x-y=-2
2x+11y=3


Let me know.. not looking for what x and y equal.. Just how you would start out to solve it.

2006-09-26 13:32:19 · 8 answers · asked by Rachel 1

2006-09-26 13:27:56 · 6 answers · asked by csbw 1

how would you find the 1st and 2nd derivative of this function?

h(x)= tan^-1(x^2)

2006-09-26 13:25:11 · 2 answers · asked by Anonymous

Assume air temperature of -8C and density of the compacted blocks of snow as 481 kg/cu m.

2006-09-26 13:24:25 · 8 answers · asked by KaseyMoe 3

(x+1)/(x-1)=(-12/x+3)+(8/x^2+2x-3)


I'm sure theres a simple thing I'm missing but I can't figure out how to solve this.

2006-09-26 13:19:46 · 5 answers · asked by levine 2

John can build a fence in 2 days; Bill can build the same fence in 5 days. If John and Bill worked together, how long would it take them to build the fence?


thanks!

2006-09-26 13:19:09 · 6 answers · asked by ♥ 3

2006-09-26 13:17:49 · 3 answers · asked by cookie_20042005 1

2006-09-26 13:15:59 · 7 answers · asked by Angel 3

my calculator broke. I have a TI 83 and when i turn it on it is just a black screen. Ive tried to change the thing where you hit second and then move the broghtness up or down. I even tried reseting every back to defaults. I need to know because calculus and chemistry homework is impossible to do with out it.

2006-09-26 13:12:14 · 3 answers · asked by MagicGhost 2

A problem occured when this problem was being printed. It seems that the printer was running out of ink and only printed some of the numbers. Can you write in the missing numbers to complete the problem?
##3
x2##
-------
#1#7
#7#0
#14#00
---------
#25###

Can someone fill in the # signs with numbers to make the equation work. Thanks

2006-09-26 13:11:15 · 3 answers · asked by Anonymous

Can you explain the answer?

You have 4 cards, labeled with the letters A and D and the numerals 3 and 6. The rule of the game is that a card with a vowel on it always has an even number on the other side. How many cards do you need to turn over to prove the rule true?

The answer is 2 - the A card and the 3 card, but I don't understand the answer. I would think either 1 card (just the A) or all 4 would be needed. If it only matters what is on the "opposite" side, then only the "A" card matters for the rule, and the others are irrelevant. If the rule matters going both ways, then it seems like any of the cards could disprove the rule. The 6 card could have a consonant under it, disproving the rule, or the D card have an even number under it, disproving the rule.

I just don't get it.

Thanks for any help.

2006-09-26 12:46:13 · 3 answers · asked by tutti frutti 1

2006-09-26 12:39:20 · 9 answers · asked by eminemgurl2008 1

2006-09-26 12:36:36 · 4 answers · asked by eminemgurl2008 1

2006-09-26 12:35:24 · 4 answers · asked by eminemgurl2008 1

2006-09-26 12:32:40 · 6 answers · asked by *~JeS~* 5

how does [b/(a - b)] x [(a^3 - b^3)/ b]

cancel to (a^2 + b^2 + ab) ?

Please show me the steps involved thanks

2006-09-26 12:20:11 · 7 answers · asked by benabean87 2

How have congruent triangles been used for strength, uniformity, ease of construction, and beauty in the bank of China Tower. The website is here... http://en.wikipedia.org/wiki/bank_of_chi...

I have a few ideas... but anymore would be a huge help. Thanks!

2006-09-26 12:07:33 · 2 answers · asked by Roberta A 1

the problem is 4 with exponent 2 x 6 1/4- 14.8 divided by (-7 9/10 + 3.9)i got the answer -7.22 but i dont think thats right can someone give me the answer cuz i know how to do it but just not this one

2006-09-26 12:03:19 · 5 answers · asked by nicole_ramey2000 1

2006-09-26 11:53:47 · 11 answers · asked by Craig W 1

Two dice are rolled, oen at a time. Find the probability of rolling a 5 on the first die and a 2 on the second. Round to the nearest percent.
A. 3% <-- what i solved it as.
B 17%
C 33%
D 100%

Refer to the above. Find the probability of rolling both numbers less than 4. Round to the nearest whole percent.
A 13%
B 25%
c 50%
d 75%

Hopefully this is my last question about probability for today.

2006-09-26 11:48:44 · 7 answers · asked by Madcat 2

2006-09-26 11:35:01 · 4 answers · asked by Anonymous