Mathematics - 14 December 2007

2007-12-14 11:09:01 · 4 answers · asked by Anonymous

2007-12-14 11:04:34 · 5 answers · asked by Anonymous

How would you figure this?

2007-12-14 10:59:29 · 10 answers · asked by cwoo 2

2007-12-14 10:59:00 · 7 answers · asked by pepper 1

2007-12-14 10:55:07 · 8 answers · asked by mrsstrick27 2

(the 64 has a line on top of it, meaning it continues--which means its 0.164646464646464etc...)

2007-12-14 10:47:59 · 10 answers · asked by Anonymous

A storm drain has a cross section in the shape of an isosceles trapezoid. The shorter base and each of the two equal sides measure 2 m, and x is the angle formed by the longer base of each of the equal sides. Write an expression for the area, A, of the cross section in terms of sin x and cos x.

2007-12-14 10:30:24 · 3 answers · asked by Chess 2

Sooo yea. I kinda forgot how many days there is in a year and I'm trying to figure out how many years old you would be if you were 429 days old? Can somebody help me?

2007-12-14 10:27:07 · 7 answers · asked by Bunni 2

A sample of 25 households in Prolific City revealed a mean of 7.5 residing members and a standard deviation of 3. If the mean household size for the nation is 4.2, what is the value of the test statistic?

2007-12-14 10:16:40 · 1 answers · asked by sandraross1956 1

2007-12-14 10:15:01 · 7 answers · asked by Nicky 2

ok so i have a quetion about geometry this is a proof
given A II B, B II C
prove A II C

parrle line's- A,B,C
A
------------------------------------------
B
-------------------------------------------
C
---------------------------------------------


im trying to prove that transitive property to my teacher that im right and the math book is wrong
Transitive property is if two quantities are equal to the same quantity, then they are equal to each other: if A=B and B=C then A=c.

doesn't this property work with parrle lines ?
and i wright?

2007-12-14 10:13:43 · 7 answers · asked by baka 2

The amount of fill (weight of contents) put into a glass jar of spaghetti suace is normally distributed with a mean μ= 850 grams (g) and standard deviation σ= 8g.



a) Describe the distribution of x, the amount of fill per jar.
b) find the probabilty that 1 jar selected at random contains between 848 and 855g.
c) Describe the disribution of x-bar, the mean weight for a sample of 24 such jars of sauce.
d) Find the probability that a random sample of 24 jars has a mean between 848 and 855g.

2007-12-14 10:02:03 · 1 answers · asked by Anonymous

plz answer.. just gimme your answer you think is right

2007-12-14 09:55:45 · 8 answers · asked by Anonymous

2007-12-14 09:54:14 · 7 answers · asked by Nicky 2

Integrate: X^2*e^3x dc

I'm assuming this is integration by parts, and I would have to integrate twice, but I can't get the answer. My u = x^2, 2du = x dx, dv = e^3x, v = 1/3e^3x. Is this right?

2007-12-14 09:50:46 · 4 answers · asked by Sean 1

2007-12-14 09:43:14 · 11 answers · asked by Nicky 2

okay, here's the problem. "Tina and Louise both celebrate their birthdays today. In 3 years Tina will be four times as old as Louise was when Tina was 2 years older than Louise is today. If Louise is a teenager, what is Tina's age?"
So if anyone can help me with this problem I'm willing to give away extra points to on other questions.
Please help me!!

2007-12-14 09:29:37 · 4 answers · asked by sunburst308 2

Suppose p is a prime and p is congruent to p (mod 4), (ie. p = 4k +3). How do I show that there is no element a in U(p) such that a^2 = p - 1?

2007-12-14 09:23:48 · 1 answers · asked by Anonymous

How many solutions does the equation sin x = 1/810 x have where x is a number of degrees?

2007-12-14 09:19:23 · 1 answers · asked by guineveres_white_wave 2

Hi,
I was just wondeirng if i could get some help solving this trig identity Prove:
sin^2x sec^2x = sec^2x - 1
i dont know how to prove LS = RS plz help

~Thnx

2007-12-14 09:04:14 · 7 answers · asked by Anonymous

Twice the first of two consecutive integers increased by the square of the second is 78.

2007-12-14 09:03:05 · 4 answers · asked by Bishwanath S 1

I have two questions that I can't figure out and if you would explain how to do them that would be great!

1. A person wants to make an enclosed play pen using 60 meters of fence. One of the sides is against the house (thus, not requiring any fencing). What are the dimensions of the play pen to get the maximum area?

2. A boat can go 12 mph in calm water. If the boat goes down a river 45 miles and back up the river 45 miles it takes him 8 hours. What is the current of the river?

Thanks in advance!

2007-12-14 08:33:42 · 3 answers · asked by Anonymous

I need help with my math homework...I don't want the answers, I just want steps on how to do it.

Sue paid $60 for a jacket that was on sale for 25% off the original price. What was the original price of the jacket?

Jan hiked a 50-mile trail in 3 days. The first day, she hiked 50% of the total distance. The second day, she hiked 25% of the distance that remained. How many miles did she hike the thrid day?

I tried doing both and I couldn't get them. Can someone help? Thanks!

2007-12-14 08:11:58 · 5 answers · asked by Anonymous

Analyze the roots of the polynomial P(x) = x^4 + 3x^3 - 5x^2 + 2x – 4

a. Tell how many possible positive rational roots.

b. Tell how many possible negative rational roots.

c. Tell how many possible complex roots.

2007-12-14 07:55:21 · 3 answers · asked by Anonymous

Hi, im having some touble with this trig question and was just wondering if i could get some help with it, any help would be great the question is
prove: sinx-tanx = sinxtanx

~ Thnx

2007-12-14 07:36:42 · 6 answers · asked by Anonymous

2007-12-14 07:05:43 · 6 answers · asked by Anonymous

i know that they cant but i dont know how to explain it in the right terms.. help

2007-12-14 06:36:03 · 10 answers · asked by Shelly Belly 1

can u refresh me up....
....pi/2
I= (x^2 +5) sinx dx
....0
can u show me the steps ..i already know the answer (pi+3) but i need the work

2007-12-14 06:34:24 · 6 answers · asked by jocuzzi 1

2007-12-14 06:09:45 · 4 answers · asked by BIgDiVa C 1

If the composite function g o f: AarrowC is a surjection, then the function f:AarrowB is a surjection.

If the composite function g o f:AarrowC is a surjection, then the function g:BarrowC is a surjection.

2007-12-14 05:57:56 · 1 answers · asked by Mary 1