Thursday

April 24, 2014

April 24, 2014

Total # Posts: 1,559

**math**

An item originally cost $16.95 and is on sale or 22%. Find the cost of the item. Explain each step

**chemistry**

A sample of helium at 20 °C occupies a volume of 3.63 L at a pressure of 3.07 atm. What volume does this helium sample occupy if the pressure is reduced to 2.43 atm while maintaining the temperature at 20 °C?

**Algebra**

finding the equation to the perpendicular lines. y=x+4; (-7,1)

**Calc**

Last question! Thanks! Given f(3)=4 and f'(3)=5 find g'(3) where g(x)= 5x/f(x)

**Calculus**

Given f(3)=4 and f'(3)=5, find g'(3), where g(x)=8x.f(x)

**physics**

a window easher pushes his brush up a vertical window at constant velocity by applying a force F as shown below. The brush weighs 12 N and the coefficient of the kinetic friction is 0.2. find the magnitude of force F.

**physics**

Two blocks are connected by a light string that passes over a massless, frictionless pulley as shown. The coefficient of friction between the 4kg block and the surface is 0.4. Find the acceleration of the system and the tension in the string.

**English**

This is the part I am having trouble with: This led Schultz to leave the shells in random places around her home. She would put them where she was sure to see them and every so often, she picked one up and squeeze it, “grateful for the reminder to live a pinch-me life....

**English**

My Essay: A Mother’s Sense of Wonder To lose a loved one is very hard to bear, but to lose a parent can be very heart-wrenching for a child at any age. Connie Schultz wrote “My Mom’s Wonderful, ‘Pinch Me’ Life,” which was published in 2012, in the...

**College Math**

Thank you very much!

**College Math**

Find the derivative of the following functions: a) f(x)=(3x^2-6 )/(x+2) b) g(x)=sin(e^2 +5x) c) j(x)=6xe^x d) Your velocity is v(t)= t^2 = 1 for 0≤ t ≤ 4. Find or estimate the distance traveled during this time.

**math**

If I had to divide 680 cm^3/s by 1.767 cm^2 and needed an answer in m/s..how would I do that? Just cancel out two cm's and then divide by 0.01?

**College Physics**

A uniform stationary ladder of length= 5.1 m and mass= 15 kg leans against a smooth vertical wall, while its bottom legs rest on a rough horizontal floor. The coefficient of static friction between floor and ladder is μ = 0.41. The ladder makes an angle θ = 51° w...

**Physics **

A cannon launches a ball with the initial speed of 210 m/s at a 70 degree angle. 1. How high will the cannonball go? 2. If the cannonball has a mass of 25kg how much work does it take to launch the cannonball to that height?

**Physics**

Standing at the edge of a cliff 240 m tall. You throw a ball into the air one directly upward at 5 m/a and another downward at -5 m/s. Use conservation energy to show that they will have the same speed at the bottom. I know I have to do it twice.. And it should seem simple. I...

**physics help!**

A uniform stationary ladder of length= 5.1 m and mass= 15 kg leans against a smooth vertical wall, while its bottom legs rest on a rough horizontal floor. The coefficient of static friction between floor and ladder is μ = 0.41. The ladder makes an angle θ = 51° w...

**Physics**

I think I got it. c) ω0 t + (0.5*α*t^2) d) 911.3 Can you just double check this?

**Physics**

I already figured out the answers to some but I need help with two more. 1) A disk with an initial angular velocity ω0 = 4.5 rad/s experiences a constant angular acceleration of α = 7.5 rad/s2 for time t = 15 s. Please answer the following questions. ω0 = 4.5 ra...

**Physics**

Thanks for taking a look! A baseball of mass m1 = 0.46 kg is thrown at a concrete block m2 = 8.25 kg. The block has a coefficient of static friction of μs = 0.81 between it and the floor. The ball is in contact with the block for t = 0.165 s while it collides elastically....

**Math**

One of my questions say 16, base 4. It says to write it as an exponent but which one is which?

**Physics**

(Need Help Only For Last Question! I figured out the first two.) A car of mass m = 1130 kg is traveling down a θ = 11 degree incline. When the car's speed is v0 = 11 m/s, a mechanical failure causes all four of its brakes to lock. The coefficient of kinetic friction b...

**math**

If a store owner buys a microwave for $200 and sells it for $275. What is the percent markup based on cost?

**English**

Thanks... And Post in the same name? If your referring my husbands posting yesterday that he used my account. I apologizes for that. It wasn't me. Thanks again for the help. And it does help. Have a great day!!!

**English**

Yes you did which I am extremely grateful. :) But now I need to make it longer and into two paragraphs. I am drawing a blank as to what to add to complete the task.

**English**

I need to make this into two paragraphs and make it a little longer. I am drawing a blank. Can someone please help me. My study habits consist of reading aloud, note taking and last minute cramming. The reading aloud and note taking have always worked well for me. Last minute ...

**Physics**

A traffic light is hanging from two cables tilted at 37 and 42 degrees. If it has a mass of 2.3 kg find the tension in each cable.

**Physics**

A freight train has a mass of 4.78 * 10^7 kg. the locomotive provides a force of 1.3 * 10^6 N and the brakes provide a force of -3.2 * 10^3 N. 1. How long will it take for the train to accelerate to it's maximum speed of 15 m/s? 2. The train accidentally stumbles into an a...

**English**

Can someone help me figure out what me figure out what my teacher is talking about here. I had to write a self introduction and she told me that I had spelling errors and redundant words. I don't see where she's talking about. My name is Devyn Donahue. I am originally ...

**English**

Got it!! Thank you so much for your help.

**English**

Does this sound any better? My study habits consist of reading aloud, note taking and last minute cramming. The reading aloud and note taking has always worked well for me. Last minute cramming hasn’t work very well. I seem to always draw a blank on test day. I found whil...

**English**

Hi, Can someone help me with my online Psychology assignment? She is a stickler for punctuation and grammar. I have not taken English yet. I need all the help I can get. The following is my assignment and response. For this assignment, I'd like you to think about your stud...

**math**

Help pleaseeee The Hotel Regal has 500 rooms. Currently the hotel is filled. The daily rental is $ 400 per room. For every $4 increase in rent the demand for rooms decreases by 8 rooms. Let x be the number of rooms that are being rented in the hotel. What should x be so as to ...

**English**

Hi, can you help me with this please? I am taking a online Psychology course. The teacher is a stickler about your punctuation and grammar. The following is my assignment and then my response. For this assignment, I'd like you to think about your study habits using the inf...

**(I need alot of help in) Physics**

Okay its starting to make sense to me now. Thanks for taking the time to explain this to me!

**(I need alot of help in) Physics**

Im starting to guess that for question one would velocity be independent of mass I asked someone else about two and they said the slopes should be neg because dv/dt = -g and since gravity is always downward then slope is neg. As for the property I'm still not sure.

**(I need alot of help in) Physics**

So in physics lab we did an experiment with a cart with two different masses on a air track (practically eliminating kinetic friction). The track was tilted at 4 degrees. Using 4 photo-gates I got the speed of both gliders and the height at each point. I made two graphs making...

**behavioral statistics**

How could you use standard scores and the standard distribution to compare the reading scores of two students receiving special reading resource help and one student in a standard classroom who does not get special help?

**Physics**

You are general in the Napoleonic wars. You are on top of a plain 12m talk and you have a cannon tht can shoot a cannonball out at 350 m/s. 800 m away is a thick forest that you cannot see into but one of your scouts in a hot air balloon has just signaled to you that an enemy ...

**Physics**

You are a general in the Napoleonic wars. An enemy fort 10m tall is located 1000m from your cannon. Your cannon expert is insisting that you will get the best results at an angle of 25 above the horizontal. Your cannon is located on a hill 10m tall. You have soldiers storming ...

**Physics**

You are a general in the Napoleonic war. The battle has taken you to a trench 7m deep. You have a mortar that will fire an explosive at a speed of 200 m/s at an angle of 80. You have a low flying reconnaissance airplane scouting out the enemy troops at a height of 500 m. Your ...

**Physics**

Suppose you are a general in the Napoleonic wars. You are no top of a plain 50 m high overlooking the enemy soldiers. You now have a brand new cannon that will decimate the enemy. Unfortunately in the christening process you used some rather cheap grade champagne and all the w...

**Physics**

A ball is thrown upward in two dimensions with an initial speed of 17 Zlugs per mega handle(made up) near the surface of the planet earth. What will be the y component of the balls velocity at the peak of its trajectory?

**Physics **

You are general in the Napoleonic wars. You are on top of a plain 12m talk and you have a cannon tht can shoot a cannonball out at 350 m/s. 800 m away is a thick forest that you cannot see into but one of your scouts in a hot air balloon has just signaled to you that an enemy ...

**Physics **

You are a general in the Napoleonic wars. An enemy fort 10m tall is located 1000m from your cannon. Your cannon expert is insisting that you will get the best results at an angle of 25 above the horizontal. Your cannon is located on a hill 10m tall. You have soldiers storming ...

**Physics **

You are a general in the Napoleonic war. The battle has taken you to a trench 7m deep. You have a mortar that will fire an explosive at a speed of 200 m/s at an angle of 80. You have a low flying reconnaissance airplane scouting out the enemy troops at a height of 500 m. Your ...

**Physics**

Suppose you are a general in the Napoleonic wars. You are no top of a plain 50 m high overlooking the enemy soldiers. You now have a brand new cannon that will decimate the enemy. Unfortunately in the christening process you used some rather cheap grade champagne and all the w...

**Physics**

A ball is thrown upward in two dimensions with an initial speed of 17 Zlugs per mega handle(made up) near the surface of the planet earth. What will be the y component of the balls velocity at the peak of its trajectory?

**Physics**

A cannon shoots a cannonball with an initial speed of 25 m/s at an angle 13. 1. What is the x component of the cannonballs initial velocity Vox? 2. What is the y component of the cannonballs initial velocity Voy? 3. What will be Vy, the y component of the cannonballs final vel...

**Physics**

A cannon fires a free projectile at an angle 85 from the ground. The cannonball has a speed of 150 m/s and it is launched from a hill 20 m above the plain where it will land 1. What is the x component of the cannonballs initial velocity 2. What is the y component of the cannon...

**Math**

1/25

**Physics **

A cannon fires a free projectile at an angle 85 from the ground. The cannonball has a speed of 150 m/s and it is launched from a hill 20 m above the plain where it will land 1. What is the x component of the cannonballs initial velocity 2. What is the y component of the cannon...

**Physics **

A cannon shoots a cannonball with an initial speed of 25 m/s at an angle 13. 1. What is the x component of the cannonballs initial velocity Vox? 2. What is the y component of the cannonballs initial velocity Voy? 3. What will be Vy, the y component of the cannonballs final vel...

**Physics**

A ball is thrown upward in two dimensions with an initial speed of 17 Zlugs per mega handle(made up) near the surface of the planet earth. What will be the y component of the balls velocity at the peak of its trajectory?

**Advanced Maths **

A reservoir is fed by two pipes of different diameter. The pipe with the larger diameter takes three hours less than the smaller pipe to fill the reservoir. if both pipes are opened simultaneously, the reservoir can fill in two hours. Calculate how long it takes the pipe with ...

**Physics **

A jet plane has a takeoff speed of Vto=125km/h (34.72 m/s) and it's engines can power it to accelerate with an average acceleration of 5.6 m/s^2. A.) what length of runway will it need to take off safely? B.) suppose it had an available runway length of only 75m. What mini...

**physics**

Standing at the edge of a cliff 240 m tall. You throw a ball into the air one directly upward at 5 m/a and another downward at -5 m/s. Use conservation energy to show that they will have the same speed at the bottom. I know I have to do it twice.. And it should seem simple. I ...

**physics**

A car is moving down a highway at -15 m/s and accelerating at 3 m/s^2. If it's initial position is at x = 0 m where will it be after 3 seconds?

**Anatomy and Physiology**

cerebrum

**public speaking**

Mandy interviewed a source who told about how she was illegally treated by the police. using her information in the speech is an example of: a. facts and statistics b. narrative c. testimony d. hypothetical example i chose b

**public speaking**

In conducting a personal interview, setting limits on what will be covered should occur: a. at the beggining of the interview b. in the middle of the interview c. at the end of the interview d. during the strategy stage i chose d

**public speaking**

when researching for supporting materials about the impact of violence in the media, it is a good idea to get assistance from this resource. a. television b. call-in radio c. librarian d. personal interview i chose d. but it wasnt correct

**math**

What is the formula or simpler equation for 33+32+31+30+29+28...

**Algebra**

Write a formula to express the given relation. The area A of a rhombus is one-half the product of the diagonals p and q.

**academic execellence**

Which of the following is NOT a potential consequence of plagiarism? A. Academic warning B. Academic probation C. Failing the course D. Cancellation of the program Is the answer C..failing the course?

**academic execellence**

Becoming a discerning consumer of research is something you can achieve by practicing good research skills and using your A. critical thinking B. education C. resources D. college library

**geometry**

abcd is a square picture frame. efgh is a square inscribed within abcd as a space for a picture. the area of efgh (for the picture) is equal to the area of the picture frame (the area of abcd minus the area of efgh). if AB=6, what is the length of EF

**pre algebra**

Ryan is thinking of a number. When he multiplies this number by 6 and then subtracts 15 from the answer, he ends up with his original number. What number is Ryan thinking of?

**pre algebra**

Laura takes very good care of her vehicles. She owns a blue van and a red truck. Although she bought them both new, she has owned the truck for 17 years longer than she has owned the van. If the sum of the ages of the vehicles is 41 years, how old is the van and how old is the...

**algebra**

simplfy 5/ (8+ã7)

**Math**

Solve for X in the equation x2 - 2x - 63 = 0.

**Reading Skills**

marriage is usually a family affair

**Politics**

thanks for your assistance

**Politics**

d. Political alienation

**Politics**

A major factor contributing to nonvoting is A. high income B. partisanship c. reductions of barriers to voting D. political alienation Is the answer B

**math words problem**

Rich’s weekly salary is based on the number of pairs of shoes he sells. He is paid a base salary of $25, plus $5 for every pair of shoes he sells. The relationship between his pay (p) and pairs of shoes (s) sold can be represented by the linear equation . Determine Rich&#...

**MATH Albera**

Sales at a certain department store follow the model where y is the total sales in thousands of dollars and x is the number of years after 2001. What was the first year that sales fell below $50,000?

**MATH**

The cost of tuition at Johnson Community College is $190 per credit hour. Each student also has to pay $60 in fees. Write a linear equation model for this situation. Use C for the cost and x for the number of credit hours.

**American Government**

Recent trends in political participation show that people are A. more involved in personal volunteer efforts but less involved in poltical party activity. B. less involved in political parties and more invoved running for public office. C. more involved as voters and less invo...

**Math**

Teng is designing a house and in each room he can choose from tiles, floorboards, or carpet for the floor. a. How many combinations of flooring materials are possible if her designs a 2 room studio? b. How many combinations are possible for a 3 room apartment? c. How many comb...

**Math**

if you have a graphing calculator, go to catalog (normally you can get there by hitting the 2nd button than 0), then hit the alpha button and hit T then scroll up to stdDev which is standard deviation, hit enter, then type in the bracket (to get to is 2nd button then paranthes...

**math**

16/25 (8/5)/2=.8 .8^2=(16/25)

**data management**

so, the answer would just be 1/6? or should it be 1/6 x 1/6= 1/36 since 2nd throw is 1/6 and fist is 1/6 too?

**data management **

a die is thrown twice. what is the probability that the sum of the rolls is greater than 9 given that the first roll is a 4?

**data management **

In a simple card game, Player A wins a point if either a face card, a red prime number, or a black perfect square number is drawn from a standard deck. Otherwise, Player B wins a point. Assume aces do not count as 1s.

**Chemistry- DrBob222**

0.2g of an organic sample W, analysed by combustion analysis results in 0.48g of CO2 and 0.1636g of H2O. We had a second sample 0.2g of W again producing 0.0618g of ammonia. Show that only C, H and N exist in W and find its emperical formula.

**Chemistry- DrBob222 Urgent Please help**

Name these: a) CH2=CH-CH=CH2 b) CH3-CH=CH-C(TRIPLE BOND)CH c) CH3-CH2-CH2-CH(Cl)-CH(Br)-CH3

**math**

31divided by 5,087

**Chemistry- DrBob222**

Can you please write the isomer name though? I will draw it from that. Write an isomer of structure for a), b) and c) and name them. a) 3,3-dimethylpentane b)3-methyl-4-ethyl-1-hexyne c)3,3,4-trimethyl-1-pentene

**CHEMISTRY PLEASE HELP**

Write an isomer of structure for a), b) and c) and name them. a) 3,3-dimethylpentane b)3-methyl-4-ethyl-1-hexyne c)3,3,4-trimethyl-1-pentene

**CHEMISTRY PLEASE HELP**

disregard this question. I posted it in a better form further up.

**CHEMISTRY PLEASE HELP**

Write an isomer of structure for a), b) and c) and name them. *(N.B- ! rep. a bond) a) CH3 ! CH3-CH2-C-CH2-CH3 ! CH3 CH3 ! b) CH3-CH2-CH-CH-C(TRIPLE BOND)CH ! CH2 ! CH3 c) 3,3,4-trimethyl-1-pentene

**chemistry**

How do you draw the structure of the reaction of 1-hexene with h2o in the presence of acid

**Finance**

A 10-year bond has a coupon rate of 7% annually and a principal payment of $1,000.0. Other similar bonds are paying 9% annually. To determine the value of the bond you must find the interest factors, IF. at: A. 9% for 10 periods B. 9% for 20 periods C. 4.5% for 20 periods D. 4...

**CHEMISTRY**

Why is the atomic emission spectrum of hydrogen composed of lines? What does each line indicate? Why do the lines become closer together from left to right in a typical diagram?

**math**

Solve a. log a = 3 b. log 1,000 =a c. loga = –2

**finance**

Which of the following is true with regards to rising interest rates. A. Use long-term loans to take advantage of current low rates. B. The term of the loan is ot impacted by rising interst rates. C. Use short term loans to take advantage of low iterest rates. D. Select long-t...

**Finance**

which of the following is true with regards to rising interest rates? A. Use Long-term loans to take advantage of current low rates. B. The term of the loan option is not impacted by rising interest rates. c. Use Short-term to take advantage of low interst rates. D. Select Lon...

**Finane**

C. Interst rate risk

**Finane**

The possibility that the fed may raise the discount rate is an example of A. Political Risk B. Exchange rate risk c. interest rate risk d. liquid risk

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