Tuesday

April 28, 2015

April 28, 2015

Total # Posts: 1,123

**Pre calc**

Vector A has magnitude 23 units and direction, counterclockwise from east, of 5.8 degrees. What is the value of its x component to 1 decimal place? Its y component? This problem seems easy enough but I keep getting the wrong answer using the law of sines. Is there another way ...
*July 30, 2010*

**Algebra**

Order of opperations or PEMDAS. Parenthasis, exponents, multiply, divide, add, subtract. In that order. For this problem, an exponent is inside of parenthasis. So if you want to solve the parenthasis first, you need to solve the exponent then multiply by 5 and then subtract by...
*July 29, 2010*

**Physics check**

A speeder traveling at 41 m/s passes a motorcycle policeman at rest at the side of the road. The policeman accelerates at 3.3 m/s2. To the nearest tenth of a second how long does it take the policeman to catch the speeder? Im sorry I am new to physics this is my first year and...
*July 13, 2010*

**Physics**

How far to the nearest tenth of a meter can a runner running at 11 m/s run in the time it takes a rock to fall from rest 90 meters?
*July 13, 2010*

**Physics**

Im sorry I am new to physics this is my first year and I still have no idea what to do for this problem. The other two that you answered I had them correct before you answered them and was using it as a check. When I reworked them your way, I got the same answer. However on ...
*July 13, 2010*

**Physics**

A speeder traveling at 41 m/s passes a motorcycle policeman at rest at the side of the road. The policeman accelerates at 3.3 m/s2. To the nearest tenth of a second how long does it take the policeman to catch the speeder?
*July 13, 2010*

**Physics**

A passenger in a helicopter traveling upwards at 19 m/s accidentally drops a package out the window. If it takes 14 seconds to reach the ground, how high to the nearest meter was the helicopter when the package was dropped? To the nearest meter what was the maximum height of ...
*July 13, 2010*

**chemistry**

can anyone explain to me this i dont understand it. Radicals Certain groups of different atoms will join together and act as a single unit when forming compounds. Such a group of atoms is called a radical. In the compound calcium carbonate, written CaCO3, the carbonate group ...
*July 10, 2010*

**Physics**

A car traveling at 10 m/s accelerates at 2.03 m/s2 for 11 seconds. To the nearest meter how far does it travel? To the nearest tenth of a m/s, what is the final velocity of the car in the previous problem?
*July 8, 2010*

**Physics**

A car accelerates at a constant rate from zero to 36.8 m/s in 10 seconds and then slows to 13.9 m/s in 5 seconds. What is its average acceleration to the nearest tenth of a m/s2 during the 15 seconds? What was the acceleration during the first 10 seconds in the previous problem?
*July 8, 2010*

**Physics**

A car accelerates at a constant rate from zero to 36.8 m/s in 10 seconds and then slows to 13.9 m/s in 5 seconds. What is its average acceleration to the nearest tenth of a m/s2 during the 15 seconds?
*July 8, 2010*

**algebra2**

the 2 is supposed to be below q-2
*June 27, 2010*

**algebra2**

q+5 + q-2 = 7/3 _____________ 3 2
*June 27, 2010*

**algebra2**

another one i dont get. the number N im millions of hearing impaired individuals of age X can be approximated by n=0.00006x by power of two+0.0006x power of two-0.1x+1.7 approxmate to the nearest millions the number of hearing impaired individual for ages 45 and 55?
*June 13, 2010*

**algebra 2**

ok supposed the base of a triangle is 5 cm greater than the height the area is 52 cm what is the height and length at the base?
*June 13, 2010*

**algebra 2**

simplify (4f power of 7)power of four is it f power of 8?
*June 13, 2010*

**algebra 2**

so t=31
*June 13, 2010*

**algebra 2**

i cant figure out how to solve this? T with two over powe +7T-18+0 so far if figure out T+ but i dunno what
*June 13, 2010*

**windows xp and vista**

I am taking this same course and I can't believe you have just posted the entire test on here when it is an open book test. Did you read anything?
*June 9, 2010*

**chemistry**

Im sorry but i dont get it..... wouldnt the Cr in C2O72- have a 6+ charge? and Cr3+ has 3+ charge. So the left Cr would be 6*4 =24 and the right Cr is 3*4= 12 so wouldnt that be 24-12= 12? what was your logic behind reducing it to 6? im sorry but this really confuses me
*June 6, 2010*

**chemistry**

for example this problem. the n is 6. how do we derive that? The galvanic cell described by the balanced chemical equation has a standard emf of 0.10 V. Calculate the maximum electrical work (kJ) the cell has done if 1987.2 g of Cr2O72-(aq) (Molar Mass - 216.00 g/mol) reacts. ...
*June 6, 2010*

**chemistry**

oh, im sorry. i wrote it wrong. But i also had one more question. Do the coeffiecents have any effect on our calculation of "n"?
*June 6, 2010*

**chemistry**

but dont you need to incorporate the charge of H+ when finding n
*June 6, 2010*

**chemistry**

i know how to do the problem but im not sure how the H+ effects the charge
*June 6, 2010*

**chemistry**

The electrochemical cell described by the cell notation has a standard emf (electromotive force) of -0.68 V. Calculate the value (kJ) for the standard free energy change of the cell. Round your answer to 3 significant figures. Pt(s) l MnO2(s) l MnO4-(aq), H+(aq) ll H+(aq), VO2...
*June 6, 2010*

**school**

no one
*June 1, 2010*

**planning & sys requirementa**

what are the problems with the reliability and usefulness of analyzing business documents as a method for gathering information reguirements. Haow could you cope with these problems to effectively use business doumnts as a source of insights on system requirements?
*May 31, 2010*

**Math**

Check your formula it should be Rsquared not R2 (60x60) not 2X60
*May 26, 2010*

**Organic Chemistry**

I'm doing the same thing but I do not understand it fully. All of my general chemistry knowledge is gone.
*May 18, 2010*

**math**

2x-5+2(2x)+17=-2-5x+(4xy-7)
*May 11, 2010*

**Math **

Hi, can anyone help to: determine the equation of a parabola with the vetex (0,3) and passing through (3,4)? How to figure out the coeffiecient of X?
*May 5, 2010*

**Math **

Hi, can anyone help to: determine the equation of a parabola with the vetex (0,3) and passing through (3,4)? How to figure out the coeffiecient of X?
*May 5, 2010*

**mgt**

what is evaluation by objectives?
*May 4, 2010*

**mgt**

what is evaluation by objectives?
*May 4, 2010*

**mgt**

what is evaluation by objectives?
*May 4, 2010*

**mgt**

what is evaluation by objectives?
*May 4, 2010*

**mgt**

what is evaluation by objectives?
*May 4, 2010*

**mgt**

what is evaluation by objectives?
*May 4, 2010*

**mgt**

what is evauation of objectives?
*May 4, 2010*

**mgt**

what is evauation of objectives?
*May 4, 2010*

**machanics\**

can u tell me what formula i should be using to answer this question? If a stone falls past a bird on a ledge moving at 4 m/s, how fast will the stone be movingjust before it hits the ground below 9 seconds later? A. 92.2 m/s B. 48.2 m/s C. 352.8 m/s D. 36 m/s
*May 3, 2010*

**begining algebra**

A cyclist traveling at a constant speed completes 3/5 Of a trip in 1 1/2h. In how many additional hours will the cyclist complete the entire trip?
*May 2, 2010*

**aed204**

I am taking that class too......this is cheating can't you do your own research
*May 2, 2010*

**machanics**

can u tell me what formula i should be using to answer this question? If a stone falls past a bird on a ledge moving at 4 m/s, how fast will the stone be movingjust before it hits the ground below 9 seconds later? A. 92.2 m/s B. 48.2 m/s C. 352.8 m/s D. 36 m/s
*May 2, 2010*

**math (parabola)**

Hi, the question is: Write the equation of the parabola with vertex(3,-1) and x-intercepts 2 and 4. I did this: y=?(x-3)^2-1 How to find the a-value? Many thanks, and I appreciate any answer!
*April 30, 2010*

**General chemistry**

oh ok thank you very much, is an online class and have to teach myself so somethings get confusing
*April 27, 2010*

**General chemistry**

No=18.0432 but im not sure what you mean by convert to BaCl2
*April 27, 2010*

**General chemistry**

A researcher needs 5.00 mg of 128Ba for an experiment. If the half-life of 128Ba is 2.43 days, how many milligrams of 128BaCl2 must she order from the manufacturer if it takes 4.50 days to ship the material from the manufacturer to the university? (Assume the molar mass of ...
*April 27, 2010*

**General chemistry**

thank you so much
*April 27, 2010*

**General chemistry**

What is the decay constant for a radioactive isotope which decreases to 34% of its original value in 2.48 hours?
*April 27, 2010*

**physics**

i dont know
*April 18, 2010*

**chemistry**

aparently it is the 100% transmittance one....
*April 17, 2010*

**social studies**

btw i am egyptian and i went through some of that stuff when i was in egypt it is horrible
*April 16, 2010*

**CAM**

FYI NOT ALL MUSLIMS OR ARABS ARE LIKE THE PEOPLE WHO PARTICIPATED IN 911
*April 15, 2010*

**language ms.sue could u please check these thanks**

suffixes empty-empties monkey-monkeys security-securities holiday-holidays pity-pities friendly-i don't know this one strawberry-strawberries delay-delays birthday-birthdays say-says vocabulary-vocabularies conspiracy-conspiracies memory-memories candy-candys story-stories...
*April 15, 2010*

**Math**

I hate word problems! Can anyone just change this Following word prob to equations pls. I can do the rest! Sam invested $4500, part at 7%, the rest at 8 1/2%. After one year, the interest earned on 7% investment was $150 less than the interest earned on the 8 1/2%. How much ...
*April 15, 2010*

**Math**

Hi! Can someone solve these for me pls? Y=10/x y=1/2x+4 solve for x and y thanks
*April 15, 2010*

**Sci 275**

Just a note that "fallow" should be spelled "follow". I think the rest of the paper is fine.
*April 14, 2010*

**math please help i don't understand this at all**

a cylinder is formed by first tapping together the opposite edges of a rectangular piece of paper that is 11 inches long and 8.5 inches wide. if the height of the completed cylinder 8.5 what is its volume?use 3.14 for pie
*April 14, 2010*

**language please check my work**

-revise the sentence for a clear meaning here is the sentence Surgeons moved around the operating room, skillfully using tools wearing slippers. -the revised sentence Surgeons,wearing slippers,moved around the operating room skillfully using their tools. please if there is a ...
*April 14, 2010*

**language could you please check my work**

i am sorry but what does avocation mean?
*April 14, 2010*

**Math**

O God I hate word problems! Is there any mechanical way to memorize word problems? Can anyone just change this Following word prob to equations pls. I can do the rest! Sam invested $4500, part at 7%, the rest at 8 1/2%. After one year, the interest earned on 7% investment was...
*April 14, 2010*

**college physics**

drwls knows his stuff
*April 14, 2010*

**meaning**

what does beam mean
*April 13, 2010*

**digraphs**

what is a digraph and could you please give me some examples
*April 13, 2010*

**Math**

Many thanks Reiny!!
*April 13, 2010*

**Math**

Thanks Dylan! But I wanted to know HOW to WRITE OTHER equations to have the same answers as the ones below? NOT how to solve these! 2x+5y=8 x-3y=-7
*April 13, 2010*

**business**

Human nature is the wrong and right ethics usually learned from families and friends.
*April 13, 2010*

**Math**

Hi! How to determine other linear systems that have the same solution as this system: 2x+5y=8 x-3y=-7 many thanks.
*April 13, 2010*

**Math**

Thanks Damon! first I eliminated z by adding equation 1+2 (1st one *2) and got same as urs x+y= 10. Then, I eliminated z by adding equation 2+3 (2nd equation*3, and 3rd equation*2) and got x-y=6. x+y= 10 x-y=6 x=16 why is this wrong?
*April 9, 2010*

**Math**

How is graphing a system of inequalities similar and different than that of equations?
*April 9, 2010*

**Math**

Help pls! I just need to set the equations only, I can do the rest. The qu. Is: The sum of three numbers is 15. The sum of the first, the second, and twice the third is 20. The sum of the first, twice the second, and three times the third is 27. This is what I did: 1st # = x ...
*April 9, 2010*

**Math**

Dear Reiny! U r a life-saver! Is there a short cut to how can I set the question or change word problems into math one? It seems that this is my problem! Also, why did my way worked as well with different answers? My answers satisfied all equations as well. Many thanks.
*April 9, 2010*

**MATH**

X= 3/3 (divide both sides by 3 to get rid of x's co-efficient) x=1
*April 9, 2010*

**math**

Dear Reiny! U r a life-saver! Is there a short cut to how can I set the question or change word problems into math one? It seems that this is my problem! Also, why did my way worked as well with different answers? My answers satisfied all equations as well. Many thanks.
*April 8, 2010*

**math**

Hi, for the question, "the sum of two numbers is equal to a third number(x+y=z). The sum of twice the first, three times the second, and twice the third is 7(2x+3y+2x=7). The third number is 3 more than the first(3+z=x), have I set the equations right? I got different ...
*April 8, 2010*

**Science**

a ship sails at an average speed 30km/h for 2 days. How far has the sip traveled
*April 6, 2010*

**Chemistry (empirical formula)**

C3H6O
*April 5, 2010*

**writing **

I have to write an eight-sentence paragraph that fully develops this topic. A high school diploma is important to my future...... (i know it's not that great of a topic but i have no options) but i keep going in circles and i can't get my ideas together .I keep ...
*April 5, 2010*

**english**

I have to write an eight-sentence paragraph that fully develops this topic. A high school diploma is important to my future...... but i keep going in circles and i can't get my ideas together .I keep wondering off the topic. Can anyone help me write this down. my main ...
*April 4, 2010*

**Physics**

consider a pair of planets that find that the distance between then is decreased by a factor of 5. Show that the force between them becomes 25 times as strong.
*April 2, 2010*

**science please no websites **

could you please give me an example of the following(types of friction) : -static -sliding And also: -friction -buoyant force -air resistance Thank You!
*March 31, 2010*

**science please no websites**

what is the scientific definition of individual THANK YOU!
*March 31, 2010*

**science**

what is the scientific definition of individual THANK YOU!
*March 31, 2010*

**7th grade Science**

Describe how the instantaneous speed of a car changes when the car is moving with constant speed , speeding up, and slowing down please answer as soon as possible
*March 28, 2010*

**language arts**

in revenge of the whale what is thomas nickerson's fate?
*March 25, 2010*

**Math**

John invested $2500, part at 8% and the rest at 12% per annum. The two parts earned equal amount of interest in one year. How much was invested at each rate?
*March 25, 2010*

**Ethics **

found help on justanswer dot com
*March 25, 2010*

**University Physics II**

How do you convert electric field into electric force?
*March 24, 2010*

**math**

The worksheet was a little confusing but after going all the way through it i got the answer of HALO
*March 24, 2010*

**nutrition**

What is the difference between simple and complex carbohydrates? How are sugars are broken down and used in the body? What are the benefits that carbohydrates provide to the body? I need help finding where I would find this infomation....I have found sites but they do not ...
*March 23, 2010*

**English**

Hey, Any ideas on how to make your own fairytale? I've already started but all i have is a couple of random paragraphss. I wasnted to make it instead of a happily ever after the hero leaves the heroin, but i want them to both have a strong love. And I don't have any ...
*March 20, 2010*

**English**

THANKS BIG HELP!
*March 19, 2010*

**English**

Hey, I need your suggestions on this one. Could you please name some of the most beautiful, most emotional pieces of writing you've ever read. It can be poetry or prose or titles of novels or even someting you've written yourself, if your gonna do that can you please ...
*March 19, 2010*

**math**

Good job!!!
*March 16, 2010*

**math**

Log (32) 2 = 5 Take the number at the bottom of the log and raise it to the power of the number after the "=" sign. So 2^5 = 32. So what do you think the answer to the next question will be?
*March 16, 2010*