Monday
April 21, 2014

Posts by katie


Total # Posts: 1,663

Math
that's not right can someone please help.

Math
Please help me, thank you. A 100 kg astronaut is standing on the outside surface of a 4.50 x 10^4 kg spacecraft. The astronaut jumps away from the spacecraft at 8.00 m/s. What happens to the spacecraft?

Math
Can someone please help me. I don't get this question. Thank You In order to avoid a severe storm at sea a ship is set to sail 200 km at an angle of N40*E, then 150 km at an angle of S60*E. What is the displacement of the ship?

French
1. les quatre années dernières 2. je suis desolee. je ne sais pas. Vous avez [word for influence]... maybe?

Math
how do i tell the difference between a binomial distribution and a poisson distribution?

Statistics-Concept Question
i know how to use both poisson and binomial tables and i know the formulas for calculating means and standard deviations, i just have a hard time figuring out when i need to use the binomial formulas or when to use the poisson formulas.

Statistics-Concept Question
I have a stats exam tomorrow and I understand the material pretty well, but i sort of get confused. because my homework comes from a section, i know what formulas to use, but i took a practice test and i'm having a hard time identifying whether a problem is poisson or bino...

Marine Biology
What zone is where most life exists?

Physics
i have no idea, i just wrote what the question said. but yes thats what i interpreted it to mean

Physics
I don't understand snell's law ( nsin(0)=nsin(0) ) and how to use it with refraction. also how do i apply that to this problem: 'a light ray enters a square piece of plastci (n=1.39) near a corner. as it encounters the adjacent side it gets refracted along the surf...

Math
Can you tell me how you would answer this question? My teacher says that one answer is correct but I think that my answer is correct. I want a second opinion. A soccer coach purchases 12 uniforms for 17.50 each. He buys 6 soccer balls for 8.58. How much did he spend in all? I ...

math
Can you tell me how you would answer this question? My teacher says that one answer is correct but I think that my answer is correct. I want a second opinion. A soccer coach purchases 12 uniforms for 17.50 each. He buys 6 soccer balls for 8.58. How much did he spend in all? I ...

social study
President Obama

geometry
What is the formula for the area of a rhombus

science
compare the amount of energy used in the United states with the ammount used worldwide. Write a paragraph explaining the social and economic reasons for the difference

Science
What keeps cheese warmer? aluminum or plastic wrap?

8th grade
how do you simplify: 3x+6 ---- 3x^2

Math
Can someone please help me with this question. Thank you! The information in the table represents the temperature of a cup of hot chocolate in relations to time. Time(t) Temperature(T) 0 60 5 54 10 48 15 44 20 41 Use the exponential regression function in your calculator to fi...

Math
Hi, I asked this question yesterday and I am still struggling with it, can someone please help me, thank you! State the image of the given point after the following transformation: (2,7) after a vertical stretch by a factor of 1/2 about the line y=1 followed by a horizontal st...

Math
Can someone please help me with this question. Thank you! State the image of the given point after the following transformation: (2,7) after a vertical stretch by a factor of 1/2 about the line y=1 followed by a horizontal stretch by a factor of 3 about the line x=3.

French
Could you please check these thanks. Directions: Complete with the verb mettre. 1. Qu'est-ce qu'ils -------- dans leur sac à dos? Ils ------------ Answer 1: mettent Answer 2: mettent 2. Qu'est-ce que tu --------- dans ton sac à dos? Je ---------- Answ...

French
Could you please check these thanks. Directions: Answer using the correct form of mettre. 1. Tu mets un survêtement quand tu fais du jogging? Answer: Oui, je mets un survêtement quand je fais du jogging. 2. Tu mets la table pour le dîner? Answer: Oui, je mets...

Quick math question
Thanks for the advice Mrs. Sue that's exactly what I'll do. I also make up problems by myself and have someone check them for me.

Quick math question
Can anyone give me a link to a free online algebra test for 9th graders. I have a test on Monday based on algebra to see if I can move on to Geometery and I need a test to see if I'm ready. Thanks

Math
the original problem was: Solve: sin(3x)-sin(x)=cos(2x) so far i've gotten to: sin(x)(2sin(x)cos(x)-1)=cos^2(x)-sin^2(x) Where would I go from here?

Math, Pre-Calc
the original problem was: Solve: sin(3x)-sin(x)=cos(2x) so far i've gooten to: sin(x)(2sin(x)cos(x)-1)=cos^2(x)-sin^2(x) Where would I go from here?

Math
Correct to the nearest tenth of a radian, state the x-intercepts and the y-intercepts for 0<x<2pi.

math
Hi! I really need help with this question. Please help me. Thanks! If f(x)=6cosx-1, algebraically determine algebraically the x intercepts to the nearest tenth. On the domain x E R.

math
Hi, Can you please help me. Thank-you. The present population of a town is 42000. a) Determine the population 4 years ago if the growth rate has been a constant 4%/year. b) Determine the number of complete years that have passed since the town first had a population of less th...

word
Physode.

Applications
Thanks!

Applications
I'm applying to the local Chamber of Commerce for a scholarship open to high school juniors to become ambassadors for our town, and it says that a cover letter and job resume are required. What should a cover letter be in this situation?

Math - Pre-Calc
So far I got it down to ((4/3)n^3+(11/6)n^2)/((4/3)n^3)+(2n^2)+(2/3)n). Would I be able to cancel out the ((4/3)n^3)s? So that it would be ((11/6)n^2)/((2n^2)+((2/3)n))? Or can I simplify that even futher by combining the (n^2)s?

Math
So far I got it down to ((4/3)n^3+(11/6)n^2)/((4/3)n^3)+(2n^2)+(2/3)n. Would I be able to cancel out the ((4/3)n^3)? So that it would be ((11/6)n^2)/((2n^2)+(2/3)n)? Or can I simplify that even futher by combining the n^2s?

Math
How would I begin to simplify this?? (4((n(n+1)(2n+1))/6)-4((n(n+1))/2)+n)/(4((n(n+1)(2n+1))/6))

language arts
Because all of the other days are week (weak) days.

Math
How do you find cos15

Spanish
also for the first one Adonde vas a comer cuando tienes hambre? for the answer you can have: voy al resturante

10th grade chemistry
How many molecules of Hydrogen gas formed when 48.7 grams of sodium added to water

4th grade
Geometry, Isoseles right triangle. Line segments MN and NO are ----? A. parallel lines, B. opposite angles, C. perpendicular lines, D. obtuse angles. I can't see that any of these are the answer to the question. Can you help me?

Anatomy
What accounts for more than 60% of the total bran weight? I looked in my book and it said one part accounted for 85% and then another part said 40%. I think it's the cerebral hemispheres, but I don't know for sure.

kindergarten
really just clap your hand gran mo ther son its 3

WORLD HISTORY
What element, found in all plants and animals, is used by scientists to determine approximate dates for an artifact’s age?

Chemistry
What is the equivalence point in an acid-base titration? I'm supposed to do a virtual lab online and it tells you to find the equivalence point, but I don't know if that means when the pH is 7 or when the indicator changes colors.

english lit
She stoops to conquer- Which characters represent the restoration period and which represent the sentimental?

Spanish
Thank you very much! I am still a little confused, but it makes much more sense to me than it did before!

Spanish
¿Qué le duele mucho a Andrea? I have: El estómago ha dolado mucho a Andrea. I'm not sure if the le has to be in the answer though because I don't really understand what the le means.

Fluid Mechanics
A supersonic wind tunnel is to be operated at M=2.2 in the test section. Upstream from the test section, the nozzle throat area is 0.07 m². Air is supplied at stagnation conditions of 500 K and 1.0 MPa (abs). At one flow condition, while the tunnel is being brought up to ...

Fluid Mechanics
A small rocket motor, fueled with hydrogen and oxygen, is tested on a thrust stand at a simulated altitude of 10 km. The motor is operated at chamber stagnation conditions of 1500 K and 8.0 MPa (gage). The combustion product is water vapor, which may be treated as an ideal gas...

Fluid Mechanics
A converging-diverging nozzle with a throat area of 2 in² is connected to a large tank in which air is kept at a pressure of 80 psia and a temperature and a temperature of 60°F. If the nozzle is to operate at design conditions (flow is isentropic) and the ambient pres...

Fluid Mechanics
A large tank supplies air to a converging nozzle that discharges to atmospheric pressure. Assume the flow is reversible and adiabatic. For what range of tank pressures will the flow at the nozzle exit be sonic? If the tank pressure is 600 kPa (abs) and the temperature is 600 K...

Math
*CORRECTION* I am supposed to find the 4 vertices of the ellipse 1=(((x+1)^2)/4)+(((y-4)^2)/9) How would I go about doing that?

Math
My teacher told me the answers were (-1,7) (-3,4) (1,4) and (-1,1). But i just didn't understand how to do it, the bell rang.

Math
I am supposed to find the 4 vertices of the ellipse 1=(((x+1)^2)/4)+(((y-4)^20/9) How would I go about doing that?

PreCalculus
A kite has a lifting surface area of 630 square meters. Suppose the wind is blowing against the kite with a force of 100 newtons at an angle of 20 degrees above the horizontal. How much force is lifting the kite? I tried to draw a diagram, but I don't really understand wha...

Chemistry
Thanks! That makes a lot more sense.

Chemistry
A student must make 500 mL of a 1.5 M HCl solution. The student has plenty of water and a stock solution of 6.0 M HCl to use. What volume of the 6.0 M HCl solution must be added to what volume of water to make the desired 500 mL of 1.5 M solution? I don't really know how t...

English
I am writing a character analysis of Laura from The Glass Menagerie, and I need to use quotations from the play. How do you cite these? Also, how do I know when to put a quote in a little indented paragraph thing of its own?

French
Can someone please explain to me the word "en", like why you would use it and it's different meanings? It seems like there's 50 ways to use it and I'm lost!

Math
I know the answer to this problem but I have no idea how to get there. Solve for all values of x if 0 is less than or equal to x, which is less than or equal to 2pie. (cosine squared of 4x) + (cosine of 4x)=0 The answer is: x= pie/8, 3pie/8, 5pie/8, 7pie/8, 9pie/8, 11pie/8, 13...

Math
For the first problem all you have to do is add 3 hours to 10:00am.(count 10:00 to 11:00 (1 hour), 11:00 to 12:00 (2 hours), etc.) For the second problem just count backwarks 8 hours (i.e. 3 hours earlier of 5:30 would be 2:30 (5:30 to 4:30 (1 hour), 4:30 to 3:30 (2 hours), 3:...

Math
Sorry, it seems cutting from Word and pasting here doesn't work. again teh problem is. Solve for all values of c if 0 is less than or equal to x, which is less than or equal to 2pie. (cosine squared of 4x) + (cosine of 4x)=0 the answer is x= pie/8, 3pie/8, 5pie/8, 7pie/8, ...

Math
I have the answer to this question but I have no idea how to get there. Solve for all values of x if 0¡Âx¡Â2¥ð. cos©÷(4x)+cos(4x)=0 The answer I have is: x=¥ð/8, 3¥ð/8, 5¥ð/8, 7¥ð/8, 9¥ð/8, 11&...

math
1. (Tan ө + cos ө)/ (sec ө + cot ө) 2. (Tan ө + cot ө)/ sec ө

math
how do I simplify this? 1. (Tan ө + cos ө)/ (sec ө + cot ө) 2. (Tan ө + cot ө)/ sec ө

Math
How would you simplify and prove (csc x - cot x) = (1-cos x)/(1+cos x)? I've tried a lot of different starts, but I keep getting stuck.

7th
music is something you feel from the heart you have to feel the rythem or the beat of life.....

year 8 Geography
how does a river change from a source to the mouth

statistics
I dont understand how to answer this: relate the three measures of central tendency to a normal distribution- I looked it up online and it said that the mean, median, and mode are all the same but i dont understand how that can be

Math/3rd grade
They would have talked for 18 minutes twice of the usual time which would be 8 plus 10 because 10 minutes more so it would equal 18...... 4+4=8+10=18

Physics
Thanks a lot. I think it's great what you teachers do on this site. Very generous of you all to help us out.

Physics
I'm confused about significant digits in multi-step problems. If I have something like (7.004 +0.2230)/(15.1-0.033+12.07) do I first do the addition and round to 4 sig figs and then do the denominator and round to 2 sig figs and finally divide? Or do I just work everything...

Algebra (urgent!)
Find an equivalent inequality with absolute value #1: -5 < y < 5 #2: x < -4 or 4 < x I'm not sure at all how to solve this problem. Please walk me through the process. Thanks!

Algebra 1
Well, here's how to do it your way: First, to find the y intercept, plug in 0 for x. That means 5 times 0 - something equals five. That means that it must be negative 5. Then, put 0 in for y. 5 times something - 0 equals five, so obviously x is 1. Another way is to take th...

Algebra (please help!)
Find an equivalent inequality with absolute value #1: -5 < y < 5 #2: x < -4 or 4 < x I'm not sure at all how to solve this problem. Please walk me through the process. Thanks!

math
The y-intercept is 7. A way to know what is the y-intercept when you are in that form (slope-intercept form), it is the number that does not have an x next to it. To find the x-intercept, put 0 in the place of x and find what would be x to equal 0. Hope I helped!

math
Try to find the difference between each number. Notice that if you take 12 away from 16, you get 4, and the same if you take 16 away from 20. Therefore, the pattern is add 4. I hope I helped!

Algebra
Find an equivalent inequality with absolute value #1: -5 < y < 5 #2: x < -4 or 4 < x I'm not sure at all how to solve this problem. Please walk me through the process. Thanks!

science
I think the it was magnetic force that pulled them up, if I am recalling that correctly, because magnetic force is related to magnets. Sorry, I don't know how to help you with your second question. I hope I helped you a little!

math
First, distribute. Basically, multiply the 2 by 4 and by the -6. That makes it be: 5x + 8x + -12 + 2x Then, you can add all of the x's together to make it simplified, getting: 15x + 12 < 10 Then, take 12 away from each side, and divide by 5. I hope I helped you!

accounting
o How are entries made under each type of accounting? o How does each type of accounting handle depreciation, if at all? o How is inventory accounted for? o Are there any differences between the organizations that adopt a particular accounting method? o What are the strengths ...

math
Three students from grades 10,11 and 12 were elected to the student council. Grade 10: Tom(T), Sally(s) and Bill(B) Grade 11: Jerry(J),Anne(A)and Connie(C) Grade 12: Dan(D), Martha(M) and Gwen(G) A three member committee is to be formed with one person from each grade. All pos...

chemistry
Thanks! But, does this rule apply to any molecular compounds. I noticed that for H2O, H2S, H2Se H2Te, the rule applies to H2S to H2Te but is different for H2O. Why is that??

chemistry
What is the relationship between the molar mass of Ne, Ar, Kr, and Xe and the melting points of their solids?

3rd grade
My nana has this thing called bells palsy which makes one side of her face hang down.She can't move her mouth and her eye won't close.we are learning about nerves and I need to know which nerves make her smile the motor nerve or sensory nerve.She is sad because she can...

Math
draw a quadrilateral that has 1 pair of parallel sides and 2 right angles. What is the name of this shape?

history
hey so for question 3 i would go with a b/c while North, Central and South America against European conquest with the Monroe Doctrine...it wasn't what we did for the ENTIRE 19th century. We got involved with Hawaii, Latin America, and Cuba...all countries that were having ...

history
I looked in my AP American textbook and it says that "The liberty-loving Filipinos assumed that they, like the Cubans, would be granted their freedom after the Spanish-American War. They were tragically deceived. Washington excluded them from the peace negotiations with S...

history
So for number 1 I would go with b... question 2 I went with b because "antiquated" means old fashioned and wedidn't have old equipment to handicap us...and question 3... I'm sorry I'm not sure about that one but I'll try looking for it! When I find th...

US History
Ok thank you everyone! I think it is the UUS Maine now! You're right it involved Spain more. And the Ostend Manifesto I was a secret document written in 1854 by U.S. diplomats at Ostend, Belgium, describing a plan to acquire Cuba from Spain. Thanks so much everyone! :)

US History
Hi i have a question... Which of the following did not involve relations between the United States and Cuba? a) Ostend Manifesto b) Platt Amendment c) the U.S.S. Maine d) missile crisis, 1962 e) Roosevelt Corollary Didn't all of these involve relations between the United S...

us history
True or False President Taft's secretary of the interior, Richard A. Ballinger, disapproved of conservationist controls of western lands?

Poem
i think that was a great poem!you are one of the kind.i loved the poem.i think it should be in a book.

5th grade
whats the synonym and antonym for privateers

college algebra
factor each polynomial m4-81

French 4
Acually, the granddaughter is right & the other =]] good jobb

9th grade science
Please explain "What happens to moist air as it traveles over the Cascade Range"

calculus
in class

calculus
I totally don't understand this part: so area = 2[integral] (-x^2 + 27)dx from 0 to 3 = 2[(-1/3)x^3 + 27x] from 0 to 3 = 2[-9+81 - 0] = 144

calculus
Find the area of the largest rectangle (with sides parallel to the coordinate axes) that can be inscribed i nthe region enclosed by the graphs of f(x)=18-x^2 and g(x)=2x^2-9. Is it equal to about 67.67? I have no idea finding the answer by using max or min. Can anyone please g...

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