Mathematics - 2 November 2007

ok im really hoping u can tell what the shapes below are and if u can tell what they are then can you please tel me which one of them has rotational symmetry
__
|...|
|...L___
|_____ | A

....... ______
........|......___|
........|......|
___|......|
.|______| B

.....___
__|......|__
|_______| C


(ignore the full stops)

thanks in advance

2007-11-02 09:32:01 · 5 answers · asked by MizKrazy 3

What is the answer 2007^2007^2007^2007?


I only need the last 3 digits. I know the last 2 numbers have to either be 01, 07, 49, or 43.

How would I find this number?

2007-11-02 09:31:58 · 10 answers · asked by neo p 2

there is evidence to suggest that certain herbs can have an effect on human memory. A researcher plans to use a standardized memory test to evaluate the effect of the herbs. Scores on the standardized test form a normal shaped distribution of, standard deviation 15 and a mean of 70. The researcher obtains a sample on N=25 people and has each person take an herbal supplement every day for 30 days. At the end of the 30 day period, each person takes the standardized memory test and the mean score for the sample is calculated to be M=78


b)identify the critical region for the test assuming that the researcher is using alpha level =.05

2007-11-02 09:30:35 · 1 answers · asked by Anonymous

2007-11-02 09:25:38 · 3 answers · asked by jarynth5 1

having a binary number, how can I systematically see if it is a multiple of 7? (no conversion possible, binary only)

2007-11-02 09:22:42 · 4 answers · asked by nute 1

2007-11-02 09:20:46 · 5 answers · asked by Alexander 6

A grain laoder can be set to discharge grain in amounts that are normally distributed with mean bushels and standard deviation equal to 26.7 bushels. If a company wishes to use the loader to fill contaianers that hold 2000 bushels of grain and wants to overfill only one container in 100, at what value of mena should the company set the loader?!!

2007-11-02 09:11:37 · 1 answers · asked by Anonymous

I know there are many ways to calculate higher powers of i. Could anyone please tell, and show, me which one works best for you. Which method do you find the easiest and fastest to use.
For example in calculating

i to the 23rd power
i to the 100th power and so on.

Thank you in advanced. Your help is very much appreciated.

2007-11-02 09:05:24 · 10 answers · asked by Anonymous

2007-11-02 08:58:17 · 4 answers · asked by Alexander 6

So my math teacher gave us this problem and I'm having problems trying to figure it out... if anyone knows how to do it, it'd be awesome to know

Two congruent semicricles lie on the diameter of a third semicricl, each tangent to the other two. A small circle in tangent to all three semicircles. If the area of the shaded region is 45pi, what is the length of a radius of the small circle?

2007-11-02 08:57:14 · 4 answers · asked by Markiss 2

I'm having troubles trying to figure out where these places are..could someone help me?

52(degrees)27'N 13(degrees)18'E
45(degrees)27'N 9(degrees)17'E
48(degrees)53'N 2(degrees)20'E

2007-11-02 08:50:16 · 4 answers · asked by Verity 2

If anyone knows any cool tips and tricks please reply. I been explained it, I just want to know if any of you know any shortcuts along the way. I know theres a lot of methods. Thanks.

2007-11-02 08:45:56 · 6 answers · asked by grfisgd 6

Can someone please advise me the correct final unit of measurement should be in the following simple calculation?

Velocity = volume per unit time/cross sectional area.

Volume per unit time = 10.08 litres per minute = 10080 millilitres per minute. 10080/60 = 168 millilitres per second.

Cross sectional area = pi radius sqared. (pi is rounded to 3 for simplicity) = 3 x 1cm sqaured = 3 cm sqared.

Velocity therefore = 168 millilitres per second (or cubic cm per second)/3 cm squared = 56..... but 56 what? 56 cm per second?

2007-11-02 08:38:14 · 4 answers · asked by natrub 2

As winter approached the men decided that they must burn fire in the fireplace to stay warm.

First man went into the forest and brought back 3 sacks od firewood.
Second man brought back 4 sacks od firewood.
third man brought back 5 sacks od firewood.

The fourth man said:
'We've got enough firewood already, do not we? Instead of bringng more firewood let me pay the three of you total $24 for your efforts',
and everyone agreed.

How should the three men divide $24?

2007-11-02 08:12:28 · 6 answers · asked by Alexander 6

2007-11-02 08:04:08 · 6 answers · asked by Jenny D 1

1. Find the dimensions of the right circular cylinder with greatest volume that can be contained in a sphere of radius 1.

2.
What is the largest (by area) rectangle with sides parallel to the coordinate axes that can be contained in the region of the plane bounded by the graphs of y=0, y=x (1-E^(x/x-1)) and x=1?

2007-11-02 08:02:31 · 1 answers · asked by swimmerxc 3

find the absolute min at: f(x) = x^6(x-2)^7 on interval (-12,14)

2007-11-02 07:50:58 · 4 answers · asked by samantha 5

If f = {(1,0),(-4,3),(0,-3)} then f-1 is

A) the inverse of f which is {(-1,0),(4,-3),(0,3)}.
B) the reciprocal of f which is 1/f.
C) the reciprocal of f which is -f.
D) the inverse of f which is{(0,1),(3,-4),(-3,0)}.

2007-11-02 07:45:39 · 4 answers · asked by Anonymous

Im a 9th grader from chennai, india. we dont do calculus this year, but Im extremey interested in learning calculus and trigonometry. Unfortunately, NONE of the books/cd's/webpages i looked at actually explained calculus to a complete beginner. can someone please give an email of a math teacher/ tell me about limit/slope/,etcetc, like for a complete beginner whos got very little idea even about trigonometry? i mean, a direct way to learn the concepts from the beginning, understanding EVERYTHING easily? I am really desperate. Could someone please help out?

2007-11-02 07:44:18 · 8 answers · asked by Vishruth V 1

I am really confused and any help would be greatly appreciated thanks.

Find dy/dx by implicit differentiation:
1) 1 + x = sin (xy^2)
dy/dx=?
2) 7x^3 + x^2 y - xy^3 = 4
dy/dx=?

Also if you can help me on this
3) use implicit differentiation to find an equation of the tangent line to the hyperbola @ pt (1,4)

x^2 + 2xy - y^2 + x = -6
y(x)=?

Thank you so much for any help you can give. I have attempted all of them but am unable to get help from my teacher. Please don't just give me the answers, I need an explanation of how to do it.

2007-11-02 07:42:14 · 3 answers · asked by bballchic6798 2

P(x) = 4-[x-5] / 16 for x= 2,4,6,8,10 ([these show absolute sign] )-. Find the mean and sd. I want to figure it out for myself, I just can't get started.

2007-11-02 07:34:21 · 1 answers · asked by andrison 1

Find the equation of each line normal to the graph of y= 2x/x-1 and parallel to the line 2x-y+1=0

Please Help

2007-11-02 07:15:08 · 5 answers · asked by john 2

2007-11-02 07:14:26 · 11 answers · asked by brian p 1

2007-11-02 07:13:55 · 7 answers · asked by Anonymous

When you have questions like: 354+255=n, and then it says, "solve for n". How do you solve it? I'm very basic when it comes to math, even though I have taken this in class a long time ago. I take special math for beginners, even though I'm 15. I have problems with math.

2007-11-02 07:13:22 · 6 answers · asked by No Name 1

if a radius of a circle is perpendicular to chord, then it ________ that chord.

2007-11-02 07:12:39 · 2 answers · asked by Nicole M 1

2007-11-02 07:07:45 · 5 answers · asked by Alexander 6

http://i2.tinypic.com/34odp3a.jpg

Third AF base C is located at equal distance from point O: AO = BO = CO, and has two types of strategic bombers deployed:
Type-A (aimed to attact A) has maximum range CA.
Type-B missile (aimed to attact B) has maximum range CB.

Missiles deployed at base A have range AB.
What is area of planet surface S is covered by missiles,
if areas covered by the bombers are respectively Sa and Sb.

2007-11-02 07:03:47 · 2 answers · asked by Alexander 6

2007-11-02 06:55:28 · 4 answers · asked by smileyD 1

2007-11-02 06:52:25 · 4 answers · asked by smileyD 1