Mathematics - 18 October 2007

At noon, ship A is 30 nautical miles due west of ship B. Ship A is sailing west at 22 knots and ship B is sailing north at 25 knots. How fast (in knots) is the distance between the ships changing at 6 PM? (Note: 1 knot is a speed of 1 nautical mile per hour.)

2007-10-18 10:48:33 · 1 answers · asked by Rachel 1

BUCK and HENRY's Horses

Buck and Henry bought three horeses of equal value $840. Buck contributed $450 and Henry conributed $390. By the end if the day, they had sold one horse $840 and decided to end their partnership. How should they divide the money fairly if Henry keeps the two horses? Explain.

2007-10-18 10:47:48 · 1 answers · asked by Rachel E 1

A sample of neon gas occupies 0.220 L at 0.860 atm. What will be its volume at 29.2 KPa pressure???
can you show me the formula plz???

2007-10-18 10:46:33 · 3 answers · asked by blahhhhhh 2

I need help with this problem:

x + sin(y) = xy

what does dy/dx = ?

2007-10-18 10:46:26 · 3 answers · asked by Anonymous

ronnie has 5 quarters. francheskia has "k" dollars. how much money does ronnie and francheskia have.write the equation. Let N stand for the answer

2007-10-18 10:46:16 · 3 answers · asked by bodigger 1

help please

2007-10-18 10:45:35 · 2 answers · asked by steve 1

Given the measure of an arc, find the degree measure to the nearest tenth of the central angle it subtends in a circle of radius 16 cm.

17. 87
18. 5.7
21. 10.24

2007-10-18 10:38:57 · 2 answers · asked by Zoology 1

the expression is 4(98)

2007-10-18 10:37:11 · 6 answers · asked by you-know-who 1

ok so wats ⎢5⎥ mean in math?? I don't mean the answer but how do you GET the answer

2007-10-18 10:33:58 · 2 answers · asked by Just me 1

the area of a circle is found by the equation A=pie r^2, if the area of a certain circle is 64 pie square centimeters, find its radius r.

2007-10-18 10:33:11 · 5 answers · asked by Dill K 1

I have one problem. I understand how to "verifying," but I am completely puzzled with this one. I have spent atleast 15 minutes on this problem and have not gotten anywhere.

1) 1-cos/1+cos = (cot - csc)(cot - csc)

Again, this is a verifying problem.
Please, I would really appreciate some help here...thanks!!

2007-10-18 10:25:29 · 5 answers · asked by Anonymous

$500 to grow to $1,039.50 if invested at 5% interest compounded anually

I atleast need the formula
thanks

2007-10-18 10:06:07 · 2 answers · asked by Luby 5

Need help!

2007-10-18 10:05:40 · 5 answers · asked by Anonymous

Please explain why. you think this.

Make the answer simple.

Thnx!

2007-10-18 10:04:56 · 9 answers · asked by Someone 2

2007-10-18 10:00:42 · 17 answers · asked by rynoxmanedge 1

95, 52, 52, 91, and 104

2007-10-18 09:57:59 · 4 answers · asked by ...? 1

Please leave explanation, or show how you solved it if you can. Thx! :)

2007-10-18 09:51:50 · 9 answers · asked by nutashuh. 1

X
1
7
7
9
A)1 B)2 C)3 D)6 E)7

The answer is C, but I do not know how to solve it.

2007-10-18 09:49:01 · 2 answers · asked by Anonymous

how do i solve this... they give me the answer .876 and i got a totally different answer of .093! whats up?

2007-10-18 09:35:29 · 3 answers · asked by nothankyou1110 2

I need help in Geometry!!!!!!!!!!!!!!!!!!

1.) y=3x-2
y=1/3x+2

2.) y=2
x=0

3.) y=1/2x+1
-4y=8x+3

4) y=x
8y-x= 8



and how do you write an equation for the perdendicular to line XY that contains pint z??????????

15.) line XY: 3x+2y=-6, Z (3,2)

2007-10-18 09:32:21 · 4 answers · asked by Anonymous

i need an equation worked out to give me 14 as my answer when there are variables on both sides.,.,.
pleez and thank u

2007-10-18 09:29:37 · 3 answers · asked by sexykarmel 1

vector A has a magnitute of 5.7 and points at an angle of 125 deg from the x-axis. vector B has a magnitute of 3.8 and points in the same direction as the x axis.

A+B = ([Ax + Bx]), ([Ay+By])
.........= ([5.7cos(180-125) + 3.8cos(0)] , [ 5.7sin(180-125)+ 3.8sin(0)]
.........= (7.1,4.7)

The magnitute of A+B is:
||A+B|| = sqrt( 7.1^2 + 4.7^2)
............= 8.5

did i do this right? and how do i find the angle for the new vector?

2007-10-18 08:50:20 · 3 answers · asked by Anonymous

please explain...

2007-10-18 08:49:54 · 8 answers · asked by me 3

what are 2 polygons other than a square and a rectangle whose reflections are identical to the original. Show how the reflectin of a triangle can be the same as the original.

I dont understand this question, Help! Thanks in advance!!!!!!!!

2007-10-18 08:39:19 · 2 answers · asked by Brittany l 2

a certain number n has facters of 15 and 10. what is the fewest total number of positive factors that n cna have??

the odds of an event happening successfully are expressed as a:b, where a:b is the ratio of the probability of a succesfullly event to the probability of an unsuccesful event. The odds of roling a 5 on an unfair die are 1:3. What is the probability of rolling a 5 with this die? express you answer as a percent

2007-10-18 08:37:40 · 1 answers · asked by John the beast 2

2007-10-18 08:36:26 · 9 answers · asked by MIKE M 1

ok.. I think if someone can show me step for step how to do this I can figure out the rest of the problems

3^(2x) + 3^(x) - 2 = 0

please help!!!

2007-10-18 08:27:52 · 3 answers · asked by me 3

Okay, so, if a mint decides to replace it's pure silver coin with a sandwich coin that is 1/2 silver and 1/2 copper and the volume of the coin (both the old style and the new) is O.24cm cubed, what is the difference in grams between the old coin and the new one?

Btw, the density of silver is 10.5 g/cm cubed and the density of copper is 9.0 g/cm cubed.

I'm just not sure how to get the density of an object made of two different elements and subsequently get the mass from knowing the density and the given volume.

I just need help understand how to work this problem, I don't need an answer.

Thanks

2007-10-18 08:15:53 · 6 answers · asked by Anonymous

y=√x-1

2007-10-18 07:57:33 · 3 answers · asked by Anonymous

i have a statistics test i studied but i want someone to help me in getting websites to practice the book is called elementary statistics by mario f. triola the topics in the test are
1. introduction to statistics
2. summarizing and graphing data
3. statistics for describing, exploring, and comparing data
4. probability
5. probability distributions
i just want to practice to ace the test

2007-10-18 07:55:31 · 1 answers · asked by xssgx911 1