Mathematics - 7 October 2007

* Both the earth and moonaret thought to have formed with simular internal temperatures about 4.6 billion yrs ago. Both world gradually lose this internal heat to space as the heat passes out throughtheir surfaces*

Question. The diameter of the earth is about four times the diameter of the moon. How does the surface area to volume ratio of the earth compare to that of the moon?


Please explain, I don't know how to do this problem.

2007-10-07 17:37:55 · 3 answers · asked by cassie05 3

(survey to see how many would know this)

2007-10-07 17:37:46 · 2 answers · asked by Anonymous

2007-10-07 17:36:42 · 3 answers · asked by Jamanski 3

Identify the center and the radius of the circle with equation (x - 6)2 + y2 = 49.

center (0, -6) and radius = 7

center (0, 6) and radius = 49

center (-6, 0) and radius = 7

center (6, 0) and radius = 7

2007-10-07 17:32:56 · 2 answers · asked by Anonymous

I have the math problem 750 divided by 175. The answer is 4.28 ect ect ect ect.

2007-10-07 17:17:51 · 4 answers · asked by Anonymous

Suppose each edge of the cube is x cm long. Find the Sin and Cos of the diagonals formed by CF and CH.

Picture at http://pic90.picturetrail.com/VOL2297/9985690/18013441/282239262.jpg

2007-10-07 17:16:20 · 2 answers · asked by Princess 2

tangents with parametric curves.

2007-10-07 17:11:08 · 2 answers · asked by Robert M 2

How do I solve this equation:
-x + 2 = 22

Steps, plz!

2007-10-07 16:41:17 · 11 answers · asked by Anonymous

1)5x-2y-z+2w=-44
2)3x+3y-4z+w=-27
3)-2x+4y+5z-2w=48
4)4x-5y+6z+4w=-23

now i tried 1 and 3, 2 and 3, 5 and 6 and none fit into the equations.

2007-10-07 16:39:32 · 2 answers · asked by m 1

what is the probablility that you will draw 2 hearts, a diamond, a spade and a club?

2007-10-07 16:36:43 · 2 answers · asked by star_wisher86 1

2007-10-07 16:36:20 · 10 answers · asked by shebby1446445 1

Find dy/dx
given y = e^(-2x) In(4x)

please show working out thanks

2007-10-07 16:34:34 · 3 answers · asked by Anonymous

I neeed help with these problems. im sorta stuck.

Simplify the expressions....

square root of 3 X square root of 27

square root of 18 X square root of 12

square root of 4 X square root of 63

square root of 1/16


square root of 9/25



thanks! =]

2007-10-07 16:26:16 · 5 answers · asked by bosstastic<3 3

1. Find the number that must divide each term in the equation so that the equation can be solved by the method of completing the square: 5x^2 - 7x = 20


which is it???
[a] 20
[b] 5
[c] -7
[d] x

2007-10-07 16:22:27 · 8 answers · asked by vennysweetgirl21 3

2. Solve by completing the square: 2x^2 + 6x - 2 = 0

is it:
[a] -3 +or- sqrt(13) /2
[b] -3 +or- 2sqrt(13) /2
[c] 3 +or- sqrt(13) / 2
[d] 3 +or- 2sqrt(13) /2

2007-10-07 16:17:15 · 5 answers · asked by vennysweetgirl21 3

and why? I know the answer is no, i just don't understand why that is. Ten points !!

2007-10-07 16:15:12 · 8 answers · asked by sing.your.heart.out 2

find all pairs (x,y) (for x and y both real real numbers) satisfying the equation.

2007-10-07 16:05:59 · 4 answers · asked by Anonymous

i need to know how many gallons this air tank i have is.
its 8" round 24" long.

2007-10-07 15:56:12 · 5 answers · asked by Sean M 2

miles required?

2007-10-07 15:53:36 · 4 answers · asked by Shirley J 1

Rule-1: (0, 0), and (1, 1) are in T
Rule-2: If (a, b) is in T, then so is (a+2, b).
Rule-3: If (a, b) is in T then so is (a, b+2).

(i) List the first 10 elements/pairs (a, b) of set T in increasing order. Use a+b as value of a pair (a, b) for ordering purpose. Break ties arbitrary. Start with (0, 0).


(ii) The set T can be defined non-inductively using several other ways. Give one such definition that does not use induction or recursion but uses set comprehension. In other words, T = { (a, b) | some property P is satisfied by a, b}. State property P.

2007-10-07 15:50:24 · 2 answers · asked by simonkf2002 1

Find N.

n,22,17,19,13,23,28

Mean is 18 Median 19

How do i find n can anyone explain?

2007-10-07 15:49:25 · 1 answers · asked by Anonymous

1. Find the term that must be added to both sides of the equation so that the equation can be solved by the method of completing the square: x^2 + 8x = 5


which is it?
[a] 32
[b] -5
[c] 16
[d] 64


2. solve by completing the square: -8x = 3x^2 - 2

is it:
[a] 4 +or- sqrt(22) /3
[b] -4 +or- sqrt(22) /3
[c] -4 +or- sqrt(10) /3
[d] 4 +or- sqrt(10) / 3

2007-10-07 15:45:29 · 4 answers · asked by Anonymous

Can you please show me the steps on how to do it please?thanks ;)

2007-10-07 15:45:10 · 7 answers · asked by Jenny 2

2007-10-07 15:42:38 · 1 answers · asked by pwayballa11 1

2007-10-07 15:38:08 · 1 answers · asked by pwayballa11 1

2007-10-07 15:37:16 · 7 answers · asked by Anonymous

Write the standard form of the equation of the line parallel to the line 3x + 2y - 3 = 0 and passes through (3,4). Can someone help me with this?

2007-10-07 15:34:20 · 3 answers · asked by doouneh 1

lim x > 0 = (x^2 - x + sinx) / (2x)

note: x^2 is x squared

2007-10-07 15:28:02 · 5 answers · asked by NEEDs MATH HELP!! 1

My brain completely spaced and I feel really retarted. In the equation 2 x 5=10, what are 2 and 5 called? (No rude comments at my stupidity please).

2007-10-07 15:27:01 · 8 answers · asked by nati 3

This is a problem really similar to our HW, I just need to know how to do them in order to do my HW!) Thanks.

{Give answer to nearest hundreth.}

Sin x + Cos x = 0

2007-10-07 15:26:40 · 2 answers · asked by raider 1