Mathematics - 7 October 2007

There is an expected demand of 20,000 units, with a .90 probability that the demand would be between 10,000 units and 30,000 units. This is based on a bell curve. What is the mean and standard deviation?

2007-10-07 15:22:33 · 2 answers · asked by Anonymous

Simplify:

Sec x - Sin x Tan x

2007-10-07 15:14:37 · 5 answers · asked by raider 1

I am doing a math assignment and I have a 90 degree trianle on side is 7in one side is 24 in how do I find the missing lenth.

2007-10-07 15:05:06 · 3 answers · asked by Tashia B 1

Solve the equation:
p^2 + (p + 9)^2 = 45

Any idea as to how to do this? Please help!

Thank you so much!!!

2007-10-07 14:40:58 · 5 answers · asked by DoWHATiDO 3

solve for x. One of the answers is _?_

6x^2-17x-14=0

2007-10-07 14:36:51 · 7 answers · asked by Anonymous

Find the derivative of

f(x)= 8e^x/(e^x)+1

2007-10-07 14:12:38 · 1 answers · asked by Lauren 1

2007-10-07 14:07:52 · 25 answers · asked by Anonymous

Suppose that the cost function for a product is given by C(x) =.002^3 -9x + 4000.
Find the production level that will produce the minimum average cost per unit.

2007-10-07 14:06:03 · 1 answers · asked by Doug 1

If you have a bag that has 4 red marbles, 6 blue, and 5 green. If someone takes out one marble and doesnt replace it and picks out anothjer one what is the probablilty that you can pull out a green one first and then a blue one? how do you do this problem? Thanks in Advance!!

2007-10-07 13:48:56 · 3 answers · asked by Brittany l 2

This is practice for the SAT
Q) If the area of a cube is 49 square inches, what is the total length, in inches, of all edges of the cube?

A) 84 in.

2007-10-07 13:40:51 · 3 answers · asked by dude 1

then the slant height is 12 mm. I know the answer is 12 mm, but I am confused on how to arrive to the answer.

SA = A + 1/2 P S???

When I use this formula, then I end up with 120S

2007-10-07 13:39:24 · 1 answers · asked by Jen 4

Prove that:

(Sin - Cos + 1) (Sin + 1)
___________=______
(Sin + Cos - 1) (Cos)

2007-10-07 13:08:52 · 1 answers · asked by kyubisasuke 1

Clue 1: the number is a perfect square
Clue 2: the only prime number in ti's prime factorization is 2
Clue 3: the number is a factor of 2
Clue 4: the sum of it's digits is odd

Please help, my friend asked me this and i'm stumped

2007-10-07 13:07:28 · 4 answers · asked by Anonymous

2007-10-07 13:04:24 · 4 answers · asked by Anonymous

6/x-7/y= 8
15/x-14/y=21

2007-10-07 13:01:07 · 2 answers · asked by 2 days after my B day :) 2

The perimeter of a triangle is 147cm. if the sides are consecutive odd integers, find the length of each side.

2007-10-07 12:59:05 · 8 answers · asked by hammy 3

Some examples you are free to use are:

1. Vertex: (2.3) y-intercept: 7
2. Vertex: (-3,2) y-intercept:-4

2007-10-07 12:56:33 · 2 answers · asked by Anonymous

what is the value of x?

2007-10-07 12:56:15 · 4 answers · asked by zdybelj07 1

Information is given about a complex polynomial f(x) whose coefficients are real numbers. Find the remaining zeros of f(x): the degree of f(x) is 3, and it has 4 and 1 - i as zeros.

I'm utterly confused on how to do this. Please explain. Thank you.

2007-10-07 12:52:57 · 3 answers · asked by labelapark 6

2 divided by X, Plus 3, Equals 8.

Need to know what X is, thanks.

2007-10-07 12:50:08 · 6 answers · asked by skinzzfan25 1

i have NOOOO idea how to solve this one problem:

A bridge is two miles long. In the heat of the summer the bridge surface expands two feet. Assume that the expansion is concentrated at the center of the bridge. How many feet high (from the old roadbed) is the center of the bridge after the expansion?

Please tell me how to do this!!

2007-10-07 12:47:44 · 3 answers · asked by Anonymous

2007-10-07 12:45:14 · 2 answers · asked by melstxi055 3

subtract 5m^2+2m+9 from 7m^2-5m-8

simplify (m^4)^3(m^2)^9/(m^3)^2

2007-10-07 12:42:27 · 3 answers · asked by tricey7578 2

I am going over a sample calc quiz for Thursday and one of the problems is
y= sin{cos^2(tanx)} i started the problem by using the chain rule right and i got
dy/dx= cos{cos^2(tanx)} * ?
i know your supposed to multiply iit by dy/dx of the inside of the parenthesis so my question is what is the derivative of cos^2(tanx)

2007-10-07 12:38:01 · 6 answers · asked by Quanice S 1

area of a square is x to the power of 2.
If you add 3 inches to one dimension and 1 inch is subtracted from the other dimension,.
How do you express the A(x) of the resulting rectangle as a product of two functions?

2007-10-07 12:30:29 · 6 answers · asked by MARITZA R 1

is the centroid the center of a triange? if not? what is?

plz help!! thankx soooooo much!!

2007-10-07 12:29:40 · 6 answers · asked by Anonymous

back again with a new problem.thanks to the people woh helped me with my other problem. how do you solve,-3I3x=2I=7. Its for homework, i'm a sophmore taking alg.2.

2007-10-07 12:26:53 · 1 answers · asked by zahyra33 2

I have a TI 84 plus.


when you hit "2nd" and then "x^-1", it shows you the list of matrices you've made

(looks something like this)

1: [A] 3 x 3
2: [B] 3x1

etc.


How do you clear this list!?!?!

2007-10-07 12:19:17 · 1 answers · asked by 2 days after my B day :) 2

Can u make an eqaution for this word problem?
Theo had $5 more than Daisy. Daisy had $11 more than Randy. Together they had 45 dollars. How much did each have?

2007-10-07 12:18:04 · 2 answers · asked by Cephas 3

Jawara brought a VCR for $349.50. He sold it back for $425. Bought it back for $435.50. And sold it again for $450.25. Did Jawara loose money or make more. If so, how much did he make?

2007-10-07 12:15:45 · 6 answers · asked by lil_younging94 2