Mathematics - 26 September 2007

If the cone formed has an angle a find the rate of change of volume with respect to height? If the height is changing at 2cms per minute, what volume of sand is falling from the hopper when the height of the cone is 3 meters? (The volume of a cone is (1/3)pr2h where h is the height and r is the radius.)

2007-09-26 12:14:28 · 1 answers · asked by Anonymous

does this reduce to 1 + i

2007-09-26 12:05:59 · 6 answers · asked by Jake L 3

4 and 3/8 + 2 and 3/4
------------------------------
5 and 3/5 - 2 and 1/3
----------------------------------
4 and 1/3 X 5


Please and thank you

2007-09-26 12:04:11 · 7 answers · asked by jeffhardygirl24_7 3

um.. this is what i did...

0 = (cos x)/(2 + sin x)

(2 + sin x) (0) = cos x

0 = cos x

x = pi/2 and 3pi/2....

um.. i dont know if i did that right..

thanks!

2007-09-26 11:58:20 · 2 answers · asked by Anonymous

2007-09-26 11:56:11 · 9 answers · asked by wahoowahoo_us 1

2007-09-26 11:54:19 · 1 answers · asked by Anonymous

Please help, thank you.

Also what is 28 + 3 (24/8) - (4 x 7) + 2 to the forth power

2007-09-26 11:48:08 · 28 answers · asked by jeffhardygirl24_7 3

63,279 by 9
27,350 by 5
77,922 by 6

2007-09-26 11:46:22 · 5 answers · asked by Anonymous

(3x+x2) (-5x2-x) three x +xsquared negative5xsquared-x
write the expression without parententhes and slove homework help please test tomorrow

2007-09-26 11:40:08 · 1 answers · asked by Anonymous

what is the answer to this question show procces please
2x-7=5x-4

2007-09-26 11:37:04 · 6 answers · asked by T.S 1

The cost of a pizza is $12.50 plus $1.50 for each extra topping. If you have $20.00 to spend then the inequality that you could use to determine the number of extra toppings (n) you could buy is represented by the inequality

1) 1.50 + 12.50n < 20
2) 1.50 + 12.50n > 20
3) 12.50 + 1.50n < 20
4) 12.50 + 1.50n < 20

2007-09-26 11:36:24 · 6 answers · asked by Anonymous

i do not get how to do this math problem at all (trig)
From a point 1.5 mi from a launch pad at cape canaveral, an observer sights a space shuttle at an angel of 10 degrees moments after its launched. After 10s the angel of elevation is 50 degrees.
a) How far does the space shuttle travel vertically during the 10s interval?
b) What is the average speed of the space shuttle during that time interval?
thank you so much

2007-09-26 11:33:38 · 3 answers · asked by brownlocadia 2

x(x+1)^1/2

I use the substitution du = 1 dx,
but from that point i have no idea how to integrate the function.

Please provide an explanation thanks.

2007-09-26 11:32:42 · 4 answers · asked by joy vision 3

Anyone know whether the integral x/(x-1) domain: [2, infinity) converges or diverges? Or the antiderivative of the integral?

2007-09-26 11:32:30 · 1 answers · asked by grayskies 2

2007-09-26 11:30:39 · 3 answers · asked by se 1

What number is a positive integer less then 100?
With that number, add 7 more, is it a multiple of 3?
The sum of the digit of the # is a multiple of 5?

2007-09-26 11:22:12 · 4 answers · asked by Beatriz B 2

2007-09-26 11:20:24 · 6 answers · asked by theblondebrat31 1

2007-09-26 11:19:11 · 3 answers · asked by watson101303 2

2007-09-26 11:16:30 · 3 answers · asked by Anonymous

(a) A line with a slope of 3, passing through the point (5,5)
(b) A horizontal line with a y-intercept of 8.
(c) A line that passes through the points (11,8) and (12,3)
(d) A horizontal line y=3


How would you define these functions? Thanks soooo much for the help! :)

2007-09-26 11:16:03 · 1 answers · asked by PaNaSoNiCeDgE 1

2007-09-26 11:16:03 · 4 answers · asked by Gavin J 2

2007-09-26 11:15:51 · 2 answers · asked by micheal 1

You must try to sumplify it.

2007-09-26 11:14:33 · 2 answers · asked by Anonymous

2007-09-26 11:14:29 · 2 answers · asked by Magzilla 2

At what time will John catch up with Mary?

2007-09-26 11:11:57 · 3 answers · asked by mztana820 1

I need to know the solution to the following problems, 4/3x-5/2x=5+1/6x & 7/x-4x/2x-3=-2 this is the best I can get it. You have to help me please! Thanx '_'

2007-09-26 11:02:27 · 4 answers · asked by stargirl 3

ok so i have to take the SAT this spring. i know algebra like the back of my hand but i sadly have forgotten most if not all of my geometry!!! i hear geometry is a huge factor on the SAT
how can i brush up on my geometry really well and quickly without having to take another class!!! and what are some key concepts that i need to know about geometry to possibly do well in that area of the test?? please please help!!!!!

2007-09-26 10:57:39 · 5 answers · asked by Anonymous

Can a probability be an Irrational number?
please explain

2007-09-26 10:57:33 · 3 answers · asked by Anonymous

I need equations to solve this how you have done it. ok?
There are twice as many people behind me as ahead of me. The number of people in line is seven more than the number of people ahead of me. How many people are in line?

Please help:

I know the euation starts something like this 2x+ 1 (me) = and what else?

desperate.

2007-09-26 10:52:33 · 6 answers · asked by Ballerina 5

Perfect Squares: 1, 4 ,9, 16, 25, 36, 49, 64, 81, 100, 121, 144, 169, 196, 225 ...

?-?=35?

and the sum of a prime number and a square equalling too 35

2007-09-26 10:47:16 · 7 answers · asked by Anonymous