Science & Mathematics - 10 July 2007

1) Oil spilled from a ruptured tanker spreads in a circle at a constant rate of 6 miles^2/hr. How fast is the radius of the spill increasing when the area is 9mi^2?

2) a 17 ft ladder is leaning against a wall. If the bottom of the ladder is pulled along the ground away from the wall at a constant rate of 5 ft/sec., how fast will the top of the ladder be moving down the wall when it is 8 ft above the ground?

If anybody can answer these questions and explain step by step in detail, you are a genius!!

2007-07-10 17:52:17 · 6 answers · asked by Anonymous in Mathematics

1 ⤊

is (n) / (1/2) same as 2n ?

2007-07-10 17:50:03 · 9 answers · asked by Anonymous in Mathematics

0 ⤊

Help with Ratios?

Can anyone explain ratios to me? everytime I think I have grasped the concept, I get to another one that I cannot figure out....the current one that has me confused is 2.5:6::10:x
I know I am probably making it harder than it is, but I just do not get it.

2007-07-10 17:44:54 · 8 answers · asked by Heather H 1 in Mathematics

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What is your way of solving something like this?

3^x 9^2x = 243

I don't see how this is supposed to be done?
Do you have to do something with the 243?
Can anyone use normal people words to do this please?

2007-07-10 17:41:53 · 6 answers · asked by Anonymous in Mathematics

0 ⤊

Is there any treatment to relieve the physical discomfort caused by an abdominal scar?

I had abdominal surgery several years ago. I no longer live near the surgeon who performed the surgery. The surgery was to remove abnormal tissue but the tissue was not cancerous.

The scar resulting from the procedure is an inch thick (rope-like) that stretches from one hip bone to the other. I'm not concerned with the appearance of the scar but it causes me physical discomfort.

Since the surgery, I gained 20 pounds (I don't know if that is relevant) to the discomfort caused by the scar. I'm not significantly overweight and I exercise three times per week.

The scar feels like a rope pulling tight from hip bone to hip bone. It isn't bothersome when I'm physically active but when I sit done to read or watch TV it is so distracting and uncomfortable I cannot relax.

I'm concerned that my insurance would consider any surgical treatment cosmetic and not covered the procedure so I would first like to first a try non-invasive treatment.

2007-07-10 17:37:41 · 9 answers · asked by ALR 5 in Medicine

0 ⤊

I know there is no evidence of gravity reduction,?

we dont know how too do it. does it go against the laws of physics?

2007-07-10 17:37:15 · 1 answers · asked by chingow 2 in Physics

4 ⤊

15 - (a - 2) = 2(a + 1) .?

How do I solve this?
a. 5

b. 16/3

c. 14

d. 16

2007-07-10 17:32:27 · 10 answers · asked by Anonymous in Mathematics

0 ⤊

how do you help a fifth grader remember the time tables?

shes 11 i need help please

2007-07-10 17:31:49 · 13 answers · asked by Anonymous in Mathematics

0 ⤊

what would the value of x be?

7:7/100:x:4 and how would you work this problem out?

2007-07-10 17:28:04 · 4 answers · asked by Heather H 1 in Mathematics

0 ⤊

Distinguish between tints, tones, and shades. How does each color modification change the original color's val

2007-07-10 17:26:16 · 2 answers · asked by jason c 1 in Other - Science

0 ⤊

Derivative of e^ x+1/ (x+1)^2?

I used the quotient rule but apparently it is wrong..can anybody show me step by step, I am still learning logarithmic differentiation and I get it mixed up with the quotient rule

2007-07-10 17:25:55 · 5 answers · asked by Anonymous in Mathematics

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math hw help?

If the set R consists of the integers 1 to 10, inclusive, what is the Greatest Factor of the sum of the Primes in the set R?

a) 1
b) 9
c) 17
d) 18
e) 27

2007-07-10 17:25:36 · 6 answers · asked by ? 2 in Mathematics

0 ⤊

What to study in physics?

I know a bit about physics, nothing much, but I am having trouble deciding what to study. Can anyone suggest a sort of guideline that covers the whole field?

Also, while I am asking this question. Can you do the same but just covering fundamental physics at a more detailed level?(fundamental particles, the forces, etc.)

2007-07-10 17:24:41 · 4 answers · asked by Anonymous in Physics

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Find the equation of the line perpendicular to the plane 3x+2y-5z=2 containing the point (1,2,-1)?

2007-07-10 17:21:46 · 4 answers · asked by Anonymous in Mathematics

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If you go back in time after the day of your birth, does your past self exist or not?

if you were born in 1970 and go back to 1980 is your 10 year old self still there somewhere? how does that work in theory? and ive heard of the grandfather paradox, so i assume if you tried to kill yourself it wouldnt work either, since you couldnt be there to go back to kill yourself, im just trying to understand time travel before I go ahead with my blueprints

2007-07-10 17:21:32 · 7 answers · asked by Papa Johnathan 4 in Other - Science

0 ⤊

-2(2y - 3) = 6 - 4y ? explain to me pleaseee how to solve this.?

a. -4/3

b. 0

c. any real number

d. no solution

2007-07-10 17:17:22 · 9 answers · asked by c h a y l e n. <333 1 in Mathematics

6 ⤊

Solve the following system of equations. x + y = 7 & 2x - 3y = -6 ?

a.(-13,20)

b. (2,5)

c. (5,2)

d. (3,4)

2007-07-10 17:13:29 · 12 answers · asked by c h a y l e n. <333 1 in Mathematics

1 ⤊

muscle biopsy question?

I just received my daughters muscle biopsy results and was told she had too many variables in fiber size but that didn't give us a dx and am wondering if anyone has any insight to what this means

2007-07-10 17:07:31 · 4 answers · asked by cbalzly 1 in Medicine

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geology questions?

Coarse-grained igneous rocks are interpreted to have cooled slowly from magma, and so they are ___.

a. intrusive
b. reclusive
c. extrusive
d. obtusive
e. preclusive

2. The andesite composite volcanoes observed along the west coast of the Americas are due to ___.

a. a subducted oceanic plate
b. subduction along a divergent plate boundary
c. rifting along a divergent plate boundary
d. rifting along a convergent plate boundary
e. mantle plumes

2007-07-10 17:04:33 · 2 answers · asked by noname 3 in Earth Sciences & Geology

1 ⤊

how do I solve Log 21 base 7=x+1?

2007-07-10 17:04:04 · 7 answers · asked by lilrascal 1 in Mathematics

6 ⤊

Find the slope of a line that passes through the points (2,-3) and (-4,5). Help meeee!?

Find the slope of a line that passes through the points (2,-3) and (-4,5).

a.-1/3

b. -3/4

c. -4/3

d. -4

2007-07-10 17:02:25 · 8 answers · asked by Audraaa. =) 1 in Mathematics

2 ⤊

What is the slope of a horizontal line?

a. m = 1

b. m = 0

c. m = -1

d. slope is undefined

2007-07-10 17:00:41 · 9 answers · asked by Audraaa. =) 1 in Mathematics

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Help with my algebra! pleaseeee. =)?

The commutative property demonstrates that _______________ will not affect the value of an expression.

a. a change in grouping

b. a change in order

c. multiplication by the reciprocal

d. addition of an opposite

2007-07-10 16:58:55 · 9 answers · asked by Audraaa. =) 1 in Mathematics

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solve and graph?

Solve and graph the solution set.

5x + 7 greater than or equal to 4x + 8

is the circle open or closed and which way will my arrow go?

2007-07-10 16:57:09 · 2 answers · asked by Anonymous in Mathematics