Sunday

November 23, 2014

November 23, 2014

Total # Posts: 3,303

**physics**

An astronaut (mass of 100 kg, with equipment) is headed back to her space station at a speed of 0.750 m/s but at the wrong angle. To correct her direction, she fires rockets from her backpack at right angles to her motion for a brief time. These directional rockets exert a ...
*November 19, 2014*

**CAL**

Hmmm you know what, I think this problem is an error. Maybe thats why I could not figure it outt?
*November 16, 2014*

**CAL**

The slope of the tangent line to the graph y= x^3/x -x at the point (1, -2/3) I keep getting undefined as a answer but.. I feel like I might be doing something wrong because I feel like that is not the answer, can you help me please?
*November 16, 2014*

**economics**

Assume a firm is a monopsonist that can hire its first worker for $6 but must increase the wage rate by $3 to attract each successive worker (so that the second worker must be paid $9, the third $12, and so on). The marginal revenue product of labor is given in the table below.
*November 16, 2014*

**Calculus - PLEASE HELP!!**

Ok. Thanks. The answer key said -1 though. So I thought I might have done something wrong.
*November 12, 2014*

**Calculus - PLEASE HELP!!**

Use L'Hospital's Rule to solve: lim u --> 1 of (u-1)^3/ ((1/u) - u^2 + (3/u) - 3) Ok, so what I thought was that it is type 0/0 so taking the derivatives of the top and bottom 3(u-1)^2 /(-u^-2 -2u - 3u^-3) and subbing in u = 1 = 0/-6 = 0
*November 12, 2014*

**Math**

Estimate the product by finding two answers the exact answer is between 7x 3,289
*November 11, 2014*

**science**

If you had 50 atoms of hydrogen, how many atoms each of oxygen, carbon, and nitrogen would you need to have the elements in the same proportion as they are in your body?
*November 10, 2014*

**science**

A certain mass of water gains 1,673 J of thermal energy when it's temperature increases by 2.0 degrees Celsius. What is the mass of the water?
*November 10, 2014*

**science**

How does the temperature of 33.0 g of graphite change when it absorbs 350 J of thermal energy?
*November 10, 2014*

**science**

How much thermal energy is needed to raise the temperature of 4.0 kg of water from 25 degrees Celsius to 75 degrees Celsius?
*November 10, 2014*

**science**

On a hot day a friend suggest that you can make your kitchen cooler by leaving the refrigerator door open. Explain whether leaving the refrigerator door open would cause the air temperature in the kitchen to decrease.
*November 10, 2014*

**science**

Which has the greater amount of thermal energy, one liter of water at 50 degrees Celsius or two liters of water at 50 degrees Celsius?
*November 10, 2014*

**Math - Word problem**

Hi Reiny - I looked at the picture and redrew my walls, but it still doesn't come out for walls that are 10' in each direction. I noticed that the ceiling and floor in the picture had a longer dimension than the side heights, so I took ceiling and floor and extended ...
*November 9, 2014*

**Math - Word problem**

I posted this earlier and received a reply - but the reply doesn't make sense. I drew up a picture of what was posted, but the figure comes out to finding the hypotenuse of a triangle that is 16x14 - not 16x10. What am I not seeing? Original problem: There is a room 10 ...
*November 9, 2014*

**Math -word problem**

I made your configuration with sheets of paper 10" x 10". I got the 16" leg, but I don't get the 10 foot height. I have the walls/ceiling in position similar to a backwards z. But from one foot over to the right from F, if I go straight up to form one of the...
*November 9, 2014*

**Math -word problem**

There is a room 10 feet high by 10 feet wide by 10 feet in length. On one wall, there is an electrical outlet 1 foot from the floor and centered five feet from each side of the wall. On the opposite wall, one foot from the ceiling and centered five feet from each side of the ...
*November 9, 2014*

**Early Childhood Education**

Studies show that early readers: A. watched educational television more than two hours a day. B. had access to a variety of reading material and watched educational television. C. knew all of the letters and sounds by age 2. D. were read fiction and non-fiction books during ...
*November 7, 2014*

**math**

what does rose mean/fell
*November 5, 2014*

**math**

How to find the area of a regular hexagon with a perimeter of 78 inches and a perpendicular distance of 11 inches from side to center
*November 4, 2014*

**Chemistry**

If a calorimeter has a mass of 6.0 g, a specific heat of 2.0 J/(g*C), and it and its contents undergo a temperature increase of 5.5 *C, how much heat is gained by the calorimeter?
*November 1, 2014*

**ratios**

simplify the rate 35 cups to 84 people
*October 31, 2014*

**math**

Karen collects 6/7 quart of rainwater. She uses ½ of the water to clean her bicycle and uses the remaining water equally for 3 houseplants. What volume of water does she use for each houseplant?
*October 30, 2014*

**Chemistry**

A student weights 1.700 g of succinic acid and dissolves it in water in a 250.0 mL volumetric flask. A 25.00 mL sample of this solution is withdrawn and placed in a 125 mL Erlenmeyer flask, to which 5 drops of the acid-base indicator phenolphthalein is added. This solution is ...
*October 26, 2014*

**math**

your recipe calls for 300 grams of chocolate .you have 200 grams .what fraction of chocolate do you have?
*October 26, 2014*

**intermidiate algebra**

Best Rentals charges a daily fee plus a mileage fee for renting its cars. Barney was charged $111.00 for 3 days and 300 miles, while Mary was charged $198.00 for 5 days and 600 miles. What does Best Rentals charge per day and per mile?
*October 25, 2014*

**Maty**

Best Rentals charges a daily fee plus a mileage fee for renting its cars. Barney was charged $111.00 for 3 days and 300 miles, while Mary was charged $198.00 for 5 days and 600 miles. What does Best Rentals charge per day and per mile?
*October 25, 2014*

**science**

Due to friction with the Earth's atmosphere, a large static electric charge could build up on our plummeting asteroid fragment. Would you expect our fragment to generate a magnetic field? Explain why or why not
*October 24, 2014*

**Math**

How do you divide 3/4 by 2/3?
*October 23, 2014*

**Math HELP!**

No, the answer is 14 in.
*October 22, 2014*

**algebra**

3/5-i
*October 19, 2014*

**Help- Calulus**

Yeah, its on my AP Calculus homework actually, in reality its just a small part of a very very long question, I just wanted to make sure I did my work right because the first step is the most important in this problem because if I get part A wrong then I will end up getting ...
*October 17, 2014*

**Help- Calulus**

A. If the focal length of the convex lens is supposed to be 5 cm, and if the image is formed 7 cm from the lens, find the distance, p, from the lens to the object. (It’s not necessary to simplify your answer.) Equation: 1/p + 1/q = 1/f
*October 17, 2014*

**Calculus**

Ohhhhhhhhhhhhhhhhhhhhh, Thanks!
*October 17, 2014*

**Calculus **

Suppose a ball is thrown straight up into the air, and the height of the ball above the ground is given by the function h(t) = 6 + 37t – 16t2, where h is in feet and t is in seconds. At what time t does the ball stop going up and start returning to earth?
*October 17, 2014*

**Calculus **

The population of a colony of bacteria is modeled by the function p(x)=50(e^-x - e^-x^2)+10 ,for 0 ≤ x, where population P is in thousands, x is in hours, and x = 0 corresponds to the moment of introduction of a certain chemical into the colony's environment. At ...
*October 16, 2014*

**Calculus **

The population of a colony of bacteria is modeled by the function p(x)=50(e^-x - e^-x^2)+10 , for 0 ≤ x, where population P is in thousands, x is in hours, and x = 0 corresponds to the moment of introduction of a certain chemical into the colony's environment. At ...
*October 16, 2014*

**Calculus..**

Thanks :)
*October 16, 2014*

**Calculus..**

Two particles are moving in straight lines. The displacement (meters) of particle 1 is given by the function s(t)= cos(4x), where t is in seconds. The displacement (meters) of particle 2 is given by the function s(t)= t^3/3-t^2/2 +2(t) , where t is in seconds. Find the first ...
*October 16, 2014*

**Chemistry**

Do you expect CaCl(s) to be stable if the 1st ionization energy of Calcium is approx. 590 kj/mol, the Lattice Energy is approx 700 kj/mol and the total change in enthalpy is -36? Why?
*October 14, 2014*

**physics**

Thank you!
*October 8, 2014*

**physics**

In a traction setup for a broken bone, with pulleys and rope available, how might we be able to increase the force along the femur using the same weight?
*October 8, 2014*

**General Psychology **

Which of the following is a stimulant? Alcohol LSD Heroin Mescaline Nicotine
*October 8, 2014*

**physics**

A 35.9 kg child starting from rest slides down a water slide with a vertical height of 20.3 m. (Neglect friction.)What is the child speed half way down
*October 7, 2014*

**College Alg**

The revenue and cost equations for a product are R=x (50-0.002x) and C= 12x+ 150000. Where R and C are measured in dollars and x represents the number of units sold. How many units must be sold to get a profit of at least 1,650,000
*October 1, 2014*

**Fluid Mechanics**

Oil (sp. gr.= 0.8) flows smoothly through the circular reducing section shown at 3 ft^3/s. If the entering and leaving velocity profiles are uniform, estimate the force which must be applied to the reducer to hold it in place. When Fluid is entering the pipe: P= 50 psig ...
*September 30, 2014*

**math**

ann takes a taxi at 2.10 per mile and she gives the driver a 5.00 tip she spend a total of 49.10 write an equation to represent total cost in terms of distance
*September 22, 2014*

**health care administration**

I need to write a weekly overview for my class. I have tried to Google but I keep asking it wrong. Any ideas on how to see an example of a overview of the class? Thank you Mary
*September 19, 2014*

**physical science**

Two 3.4 kg physical science textbooks on a bookshelf are 0.25 m apart. What is the magnitude of the gravitational attraction between the books?
*September 19, 2014*

**math**

Estimate 540943 + 382093= 923036
*September 19, 2014*

**math 4th grade**

Find two numbers the exact answer is between 3x567
*September 18, 2014*

**Physics**

Eileen, Jackie, and Kathryn needed to find the difference between two angles A1 and A2, that they had drawn on a diagram: B = A1+A2 They then had to find the cosine of B. Jackie measured A1 to be 50° and A2 to be 3°. But their pencil was kind of dull, so the lines they...
*September 17, 2014*

**algebra**

the water ina beaker has of18g electeicity is passed thought the water for two hours afterward the water has a mass of only 16g what happen to the missing mass?
*September 17, 2014*

**health care administration**

I need some advice on what are some health care products. The only thing I come up with is Q-tips and liquid bandage. Any ideas? The assignment is how the four P's influences the success of the product. I know how to do this.
*September 16, 2014*

**Chemistry please help**

thank you so much, yes the site is helpful
*September 11, 2014*

**Chemistry please help **

Complete each calculation. Express your answer to the correct number of significant digits. a)4.02mL + 3.76mL +0.95mL b)(2.7 x 10^2m) x (4.23 x 10^2m) c)5092kg divided by 23L d) 2-6.3 + 6-7 e)(6.853 x 10^3L) + (5.40 x 10^3mL) f)(572.3g + 794.1g) divided (24mL + 52mL) My ...
*September 11, 2014*

**Physics**

Two cars, A and B, travel in a straight line. The distance of A from the starting point is given as a function of time by xA(t)=αt+βt^2, with α=2.60m/s and β=1.20m/s^2. The distance of B from the starting point is xB(t)=γt^2−δt^3, with γ...
*September 7, 2014*

**stats**

what are the mean and standard error when using central limit theorem for dichotomous variable
*August 28, 2014*

**Math**

Suppose that y varies inversely as t he cube of x. If y is 1/2 when x is 2 , find the constant of variation and variation equation
*August 28, 2014*

**Th**

the area of a regular polygon varies jointly as its apothem and its perimeter. express the area in terms pf apothem a and the perimeter p
*August 28, 2014*

**math**

I have a nickel. dime and a quarter, the dime is in the middle, how do I move the dime from center wihtout touching it. I would simply slide the nickel to the back
*August 26, 2014*

**math**

I agree
*August 26, 2014*

**math**

The cost for class trip is $5 per student plus$100 for the bus. Input(x) rule output(x) 18 22 24 30
*August 26, 2014*

**math**

How many possible license plates can be made with 4 letters followed by 4 numbers and must start with the letter C
*August 26, 2014*

**business**

Wallace Inc., a developer of radiology equipment, has stock outstanding as follows: 30,000 shares of cumulative preferred 2% stock, $90 par and 125,000 shares of $10 par common. During its first four years of operations, the following amounts were distributed as dividends: ...
*August 25, 2014*

**math**

50 in 100 and 30 in 90
*August 18, 2014*

**psychology**

1 what does peter singer say about history liberation movements? 2 The philosopher,John Stuart mill recognized the follow as a potential problem for utilitarianism what is peter point about performing vivisection on mentally health disabled human infants?
*August 16, 2014*

**Math**

Adrienne had a party at a local bowling alley. She spent seventy-five dollars for the lane and five dollars per person for shoes. Let c be the total cost of the lane and shoes, and let f be the number of friends at her party. Write an equation to represent the problem. Which ...
*August 12, 2014*

**math**

For the car loan described, give the following information. A newspaper advertisement offers a $4,500 used car for nothing down and 36 easy monthly payments of $157.62. (a) amount to be paid
*August 5, 2014*

**Public Health**

The assignment What is a public health agency that affects your workplace or your health care provider. My question: Where can I find some names to do my work? I know about the FDA and CDC and the Department of disabilities. Thank You Mary
*August 1, 2014*

**Calculus**

Determine whether Ax = lnx/(sqrt x) is convergent
*July 31, 2014*

**english**

Freud believed the purpose of dreams is to consolidate memories and new learning. sort through possible solutions to everyday problems. fulfill wishes. discard unnecessary information. reconcile urges.
*July 27, 2014*

**english**

Freud believed the purpose of dreams is to
*July 27, 2014*

**finance**

202,200
*July 27, 2014*

**finance**

206,600
*July 27, 2014*

**finance**

$200.00
*July 27, 2014*

**math**

at the rate of 360 miles per hour, how far would an airplane travel in 1 hour and 20 minutes
*July 16, 2014*

**math**

a saleman, after deducting his commission of 6%, remits $2491 to his company. The gross amount of the sale amounted to.
*July 16, 2014*

**psychology**

A hypothesis is what an investigator uses to: duplicate research findings of other scientists. frame his/her research question. explain why he/she obtained a certain result from an experiment. define the parameters of a research study. determine what kind of research design to...
*July 15, 2014*

**english**

Who kills The Witch? Miss Foley Will Halloway Charles Halloway Jim Nightshade
*July 6, 2014*

**english**

What do the sign say that is on display at the carnival? The Most Beautiful Woman in the World Siamese Twins A Two-Headed Horse None of the above
*July 5, 2014*

**physics**

What is the acceleration of an object if it takes 10 seconds to increase its velocity by 40m/seconds?
*June 25, 2014*

**bearing and distance**

Two vehicles p and q leave a station at the same time.p travels 8km/hour on a bearing of 025 degree and q 5km/hour on a bearing of 45 degree west of north.how far apart are they and what is the bearing of p from q after 3hours?
*June 14, 2014*

**math,bearing and distance**

A man walks 100m due north and then 150m on a bearing of s30 degree of north.how far and on what bearing is he.from his original position?
*June 14, 2014*

**math**

. Jacqueline Strauss, a 25- year- old personal loan officer at Second National Bank, under-stands the importance of starting early when it comes to saving for retirement. She has committed $ 3,000 per year for her retirement fund and assumes that she’ll retire at age 65. ...
*June 12, 2014*

**Algebra**

If Buster Posey gets on base 45% of the time, what's the probability he will get on 5 out of 7 times at bat?
*June 10, 2014*

**math**

Max is 5 years younger than Michael . 4 years ago the sum of their ages was 25. How old are they ?
*June 8, 2014*

**math**

2and3/4plus 1and1/4 equals
*June 6, 2014*

**maths**

Jason rolls a can of baked beans from one end of his carpet to the other. If his carpet is 3 m long and if the can has a diameter of 75 mm, how many complete revolutions will the can make?
*June 4, 2014*

**Chemistry**

If 87.3 mL of 0.225M KOH solution is mixed with 44.4 mL of 0.313M H2SO4 solution, would the resulting mixture be acidic, basic or neutral?
*June 3, 2014*

**English8**

Before running, Jim always stretches. Is the gerund phrase before running or just running?
*May 15, 2014*

**English8**

Noreen hates being left behind. Find gerund phrase and tell if it is S, PN, DO, or OP I think it it being left behind and it is either direct object or predicate nominative
*May 15, 2014*

**English**

Collecting candy on Halloween and it is the subject
*May 15, 2014*

**English**

Collecting candy on Halloween still appeals to Del. find gerund phrase and tell if it is the subject, predicate nominative direct object or object of preposition
*May 15, 2014*

**geomettry**

An artist is using a coordinate plane to plan a string design for a wall. The artist plans to hammer a nail at each vetex of regular hexagon. then the artist will string to connect the vertices to make the hexagon shape. the artiststarts with a circle centered at the origin ...
*May 14, 2014*

**geo**

a graphic artist is using a coordinate plane to design a company logo. the log has an equilateral triangle inscribed in a circle.. The lies in quadrant 1, is tangent to the x and y axis and has a radius of 10 units. one side of the triangle is parallel to the y axis and one ...
*May 14, 2014*

**science**

a land form characterized by high elevation and a more or less level surface is called A.mountian B.plain C.plateau D.hill 3.which of the following statements about topography is correct A. The topography of an area includes the area's elevation, relief, and land forms B. ...
*May 14, 2014*

**science**

i think it is b
*May 14, 2014*

**science**

how is the equator similar to the prime meridian A. both the prime meridian and equator are lines that divide earth into norther and southern hemispheres B. both the prime meridian and equator are imaginary base lines from which locations of earth can be measured D. both the ...
*May 14, 2014*

**statistics**

8.Jean Siskel is an entertainment analyst for West Coast Securities. He is trying to develop a model to estimate gross earning generated by a new movie release. He has collected the following data on 20 movies: Gross Earnings, Production Costs, Promotion Costs, and if the ...
*May 8, 2014*

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