Mathematics - 8 October 2007

Sand is falling off a conveyor onto a conical pile at the rate of 15 cubic feet per minute. The diameter of the base of the cone is approximately twice the altitude. At what rate is the height of the pile changing when it is 10 feet high?


Please answer soon i have a test tomorrow!

2007-10-08 15:02:39 · 1 answers · asked by Rahul R 2

A square computer screen measures 14 inches along its diagonal. How many inches long is the perimeter? Round your answer to the nearest whole number.

please help me solve this!
thanks! :-D

2007-10-08 14:41:23 · 5 answers · asked by Anonymous

Please help me i cant seem to figure it out.

Thanks

2007-10-08 14:39:06 · 12 answers · asked by PrincessBri 1

Please help me! I cant figure it out because of the cube part! and please show how you go the answer! =]

2007-10-08 14:37:30 · 5 answers · asked by Anonymous

A cube is made of a white material, but the exterior is
painted black. If the cube is cut into 125 smaller
cubes of exactly the same size, how many of the
cubes will have 2 of their sides painted black?

2007-10-08 14:34:25 · 4 answers · asked by Jonathan 2

find the derivative of..


ds/dt if s= t/(2t+1)


answer: 1/(2t+1)² but i need to know how to get there

thanks!

2007-10-08 14:28:23 · 4 answers · asked by Katie 4

please show steps
Mean Value theorum states
f(b) - f(a)= f'(c)(b-a)

2007-10-08 14:23:37 · 1 answers · asked by lana 1

a.4
b.9
c.2
d.12

2007-10-08 14:21:22 · 5 answers · asked by isabela 2

Could someone show me what I did wrong?

Thank YOu!

2007-10-08 14:20:22 · 9 answers · asked by Anonymous

I have done this but I think I missed a step. The grid is 4 squares by 4 squares for a total of 16 square boxes in all. How many squares can you get out of the grid? I think its 30 but I am not the best at math. I drew a bunch of grids and tried it that way. But, here's the thing that's bugging me. I did this years ago and I think you can actually get squares using a section of 3 squares by 3 squares within the four square box

2007-10-08 14:16:49 · 8 answers · asked by ItsMee! 2

I cant figure out my 13 year olds homework!!

2007-10-08 14:13:41 · 10 answers · asked by cpc_juli 1

How does this work out?

where x^(1/3) times 3x^2
(the third root of x) times (three x squared)

becomes
x times 9x^2
(x) times (9 x squared)

How does that work out?? It seems to me that it should come out to be:

3 x^(7/3)
(3 x to the seven/thirds power)

2007-10-08 14:10:05 · 4 answers · asked by E 2

Jennifer has a set of tiles that are all the same size. She arranges them in a retangular design that has a perimeter of 38 tiles. Which choice could be the number of tiles she has?

A. 24 B. 48 C. 36 or D. 52

2007-10-08 14:05:30 · 7 answers · asked by Miss Pleo 2

it says find the derivative.. and the equation to find it as u know is Lim h-->0 f(x+h) - f(x) / h


1. r(s) = sq.rt(2s+1)


thanks

2007-10-08 14:05:28 · 2 answers · asked by Katie 4

A. x + y = 8

B. y = 1/2x -1

C. x = -2

2007-10-08 14:01:39 · 2 answers · asked by Marshall W 2

2007-10-08 13:59:48 · 4 answers · asked by salim d 1

2007-10-08 13:59:02 · 2 answers · asked by Anonymous

2007-10-08 13:53:58 · 3 answers · asked by Anonymous

Find the Lateral Area, Surface Area, and Volume of a cone with radius 5 cm and slant height 13 cm. Use pi = 3.14 and round your solutions to the nearest hundredth if necessary.
Show your work for credit.

2007-10-08 13:32:20 · 2 answers · asked by Anonymous

Given the points (1, -4) , (x , 5) and slope, m= 3 ; solve for x


Anyone know what type of formula would be used here

2007-10-08 13:30:06 · 7 answers · asked by Anonymous

2 patches of grass on field are 9x 12 feet. One bage of grass seed covers 15 yards. How many bags will be needed to cover field with grass seed? Oh and how we get this would be wonderful.
Thanks!

2007-10-08 13:27:14 · 10 answers · asked by SexyMamaNurse 2

OKay... my question is do you square the x and then multiply the coefficient?

2007-10-08 13:25:24 · 5 answers · asked by Anonymous

http://i40.photobucket.com/albums/e215/xxs3xp1stolxx/Picture12.png

2007-10-08 13:21:10 · 1 answers · asked by Anonymous

Determine the maximum perimeter of a rectangle inscribed in a parabolic arch modeled by the equation y = 7 - 3x^2 so that the base of the rectangle is along the x-axis.

I have no idea what this problem is asking. Any help?
I don't need the answer, just help on getting it started.
(What is parabolic arch?)

2007-10-08 13:15:24 · 3 answers · asked by bucknell 2

2007-10-08 13:13:49 · 1 answers · asked by erica w 1

I'm stuck on this one.

(16b^-2c)(25b^4c^-5)
------------------------------
(15b^5c^-1)(8b^-7c^-2)

2007-10-08 13:06:48 · 3 answers · asked by Anonymous

The problem is: Solve for X:

(x+1)^2 (x-3)^2 (x+3)^2 - (x+1)^3 (x-3)^2 (x+3)^2 = 0


Would the (x-3)^2s and the (x+3)^2s just cancel leaving (x-1)^2 - (x+1)^3??

Where do I go from there??

2007-10-08 13:05:10 · 3 answers · asked by beans1196 1

Anyone know???

2007-10-08 13:04:55 · 6 answers · asked by Anonymous

Help. :(

2007-10-08 13:01:30 · 7 answers · asked by xy z 1

(y/x)+(x/y)=2y

2007-10-08 12:51:40 · 2 answers · asked by Mr. Vill 1