Mathematics - 10 November 2007

what is 30 percent of 270

2007-11-10 08:32:43 · 14 answers · asked by Nicole 2

2007-11-10 08:27:16 · 4 answers · asked by Anonymous

Michael says that he has an attendance rate of 95%. in a week at college Michael has 15 lessons

a)Michael says that he can use the binomial distribution to model the number of lessons that he attends in a week. Give reasons why he might be correct

b)assuming that michael is correct, find the mean and standard deviation for the number of lessons that he attends in a week

2007-11-10 08:27:11 · 1 answers · asked by Ryujin 3

Show that the equidistant set of two points in R^3 is a plane. a) Show that the plane passes through O if the two points are both at distance 1 from O.
b) Deduce from (a) that the equidistant set of two points on S^2 is a "line" (great circle) on S^2. Next, we establish that there is a unique point on S^2 at given distances from three points not in a "line".
c) suppose that two points P,Q belong to S^2 have the same distances from three points A,B,C belong to S^2 not in a "line". Deduce from (b) that P=Q.
d) deduce from (c) that an isometry of S^2 is determinated by the images of three points A,B,C not in a "line".
Thus, it remains to show that the following. Any three points A,B,C beong to S^2 not in a "line" can be mapped to any other three points A',B',C' belong to S^2, which are separated by the same respective distances, by one, two ore three reflections.
Complete this proof o the three reflections theorem

2007-11-10 08:24:27 · 2 answers · asked by bmwm5 1

2007-11-10 08:07:42 · 7 answers · asked by Anonymous

Proof: 1 + 2 + 3 + ... + 99 = (99*100)/2 please explain also

2007-11-10 07:59:50 · 6 answers · asked by Anonymous

2007-11-10 07:54:34 · 6 answers · asked by Anonymous

The problem you need to verify is:

sin2x = (2tanx)/(1+tan²x)

You must use double angle identities to verify this. Pathagorean identites may also be used.

*Please not that the perenthesis are just there so you can tell what is on the bottom and what is on the top of the fraction.

2007-11-10 07:51:00 · 3 answers · asked by Anonymous

My teacher asked us a very odd Stats question please help !..

How would I figure this out?:


For the following problems:
1. State the Null Hypothesis and the Alternative Hypothesis
2. Determine the test statistic.
3. Determine the P-value
4. Make a decision regarding the hypotheses based on the P-value and the Level of
Significance.

8. In a recent year, some professional baseball players complained that umpires were calling more strikes than the average rate of 61% called the previous year. At one point in the season, umpire Dan Morrison called strikes in 2231 of 3581 pitches (based on data from USA Today). Use a 0.05 significance level to test the claim that his strike rate is greater than 61%.

2007-11-10 07:46:41 · 1 answers · asked by phil m 1

Given the function f(x)=2x+3, find 2 points, and find the slope between these points.

Please show all the steps because I really want to learn how to do it!!
Thanks

2007-11-10 07:45:57 · 6 answers · asked by ker 2

i don't really know if my answer -7x(x-7) is right

2007-11-10 07:45:32 · 6 answers · asked by Jessica 1

2007-11-10 07:37:34 · 4 answers · asked by honnerstar1 1

they are talking about a car depreciating. the purcase price of the car is $12000
the actual answers are
a)1983.57
b)14 months

2007-11-10 07:37:12 · 2 answers · asked by Anonymous

and also what is 2.30 divided by 0.05.

2007-11-10 07:33:59 · 4 answers · asked by Anonymous

and also can you solve 6 over 13 times 26 over 30.

2007-11-10 07:31:21 · 8 answers · asked by Anonymous

2007-11-10 07:27:56 · 3 answers · asked by cjbass21 1

2007-11-10 07:24:33 · 1 answers · asked by glenne 1

Is there a real number that is less than the number one (1) and greater than the number represented by a decimal followed by an infinite number of nines (.999999....)?

2007-11-10 07:21:04 · 6 answers · asked by pgriles 2

how do you do these problems:
by the way *= squared
~factoring monomials first~ (factor the expression)
1) 3x* + 54x + 243
2) 8y* - 28y - 60
3) 112a* - 168a + 63
4) u* + 7u
5) -v* + 2v - 1

Equations in standard form (solve the equation)
1)x* + 9x = -20
2)5p* - 25 = 4p* + 24
3)(w + 6)* = 3(w + 12) - w*

I realize that it's a lot of problems for one question but it you could do one of the first equations and one of the second equations I would really appreciate it. Also do you think you could show me the steps on how to to these. I am so very lost! Please help and thanks! Will choose best answer!!!

2007-11-10 07:17:55 · 5 answers · asked by Loaha 2

THIS IS sort of a combinations of math and history, because it's well, the history of math, so i need help finding 3 people from the past, the teacher gives us clues

1st one, male, born in greece about 287 BC, figured out the value for PI,

2nd one, gender unknown, born in paris, birth time unknown, developed a concept which now is called 'analytical geometry'

3rd one, male, born in 1718 in to a wealthy and literate family, when 13, learned to speak 7 languages, at age 21 (i think), was already discussing complex complex philosophical questions with adults on a regular basis, also Published "two - volume Analytical Institutions", x2y=4a2(2a-y)

those are the only ones that i dont know yet, so HELP!

2007-11-10 07:14:21 · 5 answers · asked by Anonymous

math problem: You want to order a deli platter for a sports banquet. You need 12 lbs of meat and cheese. You want twice as much meat as cheese on the platter and the same amount of ham and turkey. The price per pound is $4.95 for ham, $6.99 for turkey, $7.99 for roast beef, and $4.36 for cheese. How many pounds of each should you order if you plan to spend $64.24?

- We have been working with matrices and linear systems. So I know I should set it ups a linear system or a matrix but I have no clue what to do. I have been working on this for so long. Any help would be greatly appreciated.

2007-11-10 07:08:34 · 6 answers · asked by lexusright 1

First of all, please don't answer "Do your homework"

A climber left base camp at 5AM to ascend a 7400-M peak. The climber gained altitude at the rate of 240 m/h and at 8 AM was at the 6500-M level.

a.) Find the elevation of the base camp
b.)At what time did the climber reach the summit?

These have to be described w/ a linear function, not algebraically.

2007-11-10 07:06:01 · 3 answers · asked by Eric 3

what is the limit as x approaches positive infinity for the function (xe^(1/x)-x)(e^x+x)^(1/x)

Anyone have any idea how to do this? I'd appreciate any help.

Thanks.

2007-11-10 07:01:30 · 2 answers · asked by Anonymous

Rep-tiles

Put 4 copies of Triangle A together to make the same shape, only bigger.

Put 4 Copies of triangle B together to make the same shape.only bigger.

you are allowed to turn the shapes upside down but the pieces are not allowed to overlap.....

that's my math fair puzzle

2007-11-10 06:55:18 · 2 answers · asked by marthin v 1

Find the slope of the tangent line to the curve:

sqrt(2x + 4y) + sqrt(3xy) = 14.6

at the point (3, 8)

2007-11-10 06:53:22 · 2 answers · asked by m_mays89 2

2007-11-10 06:51:03 · 4 answers · asked by Anonymous

If a ball is thrown vertically upward from the roof of 32 foot building with a velocity of 80 ft/sec, its height after t seconds is s(t) = 32 + 80t - 16t^2 .

What is the maximum height the ball reaches?

What is the velocity of the ball when it hits the ground (height = 0 )?

2007-11-10 06:50:45 · 2 answers · asked by m_mays89 2

i need to hand this in by monday

2007-11-10 06:50:24 · 4 answers · asked by Jessica 1

two 6 sided dice being rolled. the prob of 2 numbers differing by more than 2?

2007-11-10 06:43:29 · 1 answers · asked by parev 1

Also: I know that in Base 8, 1 plus 7 = 10. So, in Base 8, is "10" pronounced "ten" or "eight"?

2007-11-10 06:39:51 · 2 answers · asked by canucklehead1951 4