Tuesday

May 26, 2015

May 26, 2015

Total # Posts: 81,738

**Physics**

The force acts on a 1.7kg object whose initial speed is 0.44m/s and initial position is x = 0.27. Find the speed of the object when it is a the location x = 0.99m?
*March 31, 2015*

**Ethics & Social Responsibility**

Which group of people might not be fully autonomous in choosing to be a research subject?
*March 31, 2015*

**Chemistry**

What would be the consequence of competing equilibria, such as from other ingredients in an aspirin tablet in a titration lab results? What if there were several pain relievers in the same tablet? How could the error from these interferences be minimized?
*March 31, 2015*

**Calculus **

A certain magical substance that is used to make solid magical spheres costs $800 per cubic foot. The power of a magical sphere depends on its surface area, and a magical sphere can be sold for $20 per square foot of surface area. If you are manufacturing such a sphere, what ...
*March 30, 2015*

**Science help please!!**

Hi Katty! Had this question before, you are 100% correct :) Any other questions, I'll be glad to check ;)
*March 30, 2015*

**L.A**

In which sentence is the meaning of the word inarticulate best expressed? A. he impressed the audience with his inarticulate expressions B. the young girl was exceptionally animated and inarticulate. C. she had many ideas to share, but she was an inarticulate speaker*** D. the...
*March 30, 2015*

**L.A**

I think D as well
*March 30, 2015*

**L.A**

I don't think he's ashamed of anne. My other thought was D
*March 30, 2015*

**L.A **

What do you think Mr. Frank means in the passage from The Diary Of Anne Frank, act II? Passage: Annes Voice: In spite of everything, I still believe people ar really good at heart. [ Mr. Frank: ( slowly closes diary) Mr. Frank: "she puts me to shame" A. he is ashamed...
*March 30, 2015*

**american government**

3. Which of the following is true regarding senatorial courtesy? (Points : 1)
*March 30, 2015*

**Social Studies**

the answer is B
*March 30, 2015*

**Programming**

1.Do the planning and write an algorithm to solve the following problem. Prepare test data for the example to test all possibilities and draw a trace table. Sam works at a coffee company where all the employees receive a bonus of R700, except the employees in the coffee ...
*March 30, 2015*

**chemistry**

is trans-dibromoethene a proper way of labeling an alkene?
*March 30, 2015*

**Math**

What percentage of the total students chose skateboarding? Skateboarding boys=2 girls=1 A. 10% B. 20% C. 30% D. None of these Is the answer D? Thank took you
*March 30, 2015*

**Math**

The demand for a commodity generally decreases as the price is raised. Suppose that the demand for oil (per capita per year) is D(p)=800/p barrels, where p is the price per barrel in dollars. Find the demand when p=55. Estimate the decrease in demand if p rises to 56 and the ...
*March 30, 2015*

**child day care**

there is really no way to get the answer out of the little bittie book they gave us i chose this but still dont understand and i hope your not a teachers cause you are no help to any one's education bringing them down God doesnt like Ugly.
*March 30, 2015*

**Math**

Tyler earns 7$ an hour mowing lawns. Write and solve an inequality that he can use to find at least how many hours he has to work to earn 100$
*March 30, 2015*

**math**

The answer is 25 lights
*March 30, 2015*

**Reading**

Umm.. Reed if it is ok with you I can copy and paste my essay and then u can check it then tell me and then remove it.
*March 30, 2015*

**Reading**

ya u can
*March 30, 2015*

**Reading**

Does this sound good?? Did you know that you can text and call from an iPhone, but you can only do it with an iPod with Wi-Fi!
*March 30, 2015*

**Reading**

Thanks
*March 30, 2015*

**Reading**

Yes I know what a hook is, It is something that grabs the readers attention, and sorry Ms. Sue!!
*March 30, 2015*

**Reading**

Can someone plz help me????????
*March 30, 2015*

**Reading**

Hi, Can someone tell me a good hook for a compare and contrast essay. Topic:- IPOD Vs. IPHONE, Thanks!!
*March 30, 2015*

**Probabilit**

Three marbles are drawn without replacement from an urn containing 4 red marbles, five what marbles, and two blue marbles. Determine the probability that None is red
*March 30, 2015*

**math**

^3ã54^5
*March 30, 2015*

**Math**

the number cube shown is rolled and the spinner shown is spun. find P(5 and blue). A. 4/6 B. 1/24*** C. 1/9 D. 1/16 *Btw the cube (or dice) has 6 sides and the numbers 1-6 and the spinner has 4 sides aka squares.. 2 yellow sqaures, 1 blue, and 1 green) The question is asking P...
*March 30, 2015*

**phusics**

a) k.e = 1/2 mv^2 = 1/2(0.05)(900)^2 note 50g converted into kg
*March 30, 2015*

**calc**

When production is 3000, marginal revenue is 7 dollars per unit and marginal cost is 5 dollars per unit. Do you expect maximum profit to occur at a production level above or below 3000? (Enter above or below.) If production is increased by 30 units, what would you estimate the...
*March 30, 2015*

**Calc**

The demand for a commodity generally decreases as the price is raised. Suppose that the demand for oil (per capita per year) is D(p)=800/p barrels, where p is the price per barrel in dollars. Find the demand when p=55. Estimate the decrease in demand if p rises to 56 and the ...
*March 30, 2015*

**Calculus **

The price-demand and cost functions for the production of microwaves are given as p=235−x40 and C(x)=14000+70x, where x is the number of microwaves that can be sold at a price of p dollars per unit and C(x) is the total cost (in dollars) of producing x units. (A) Find ...
*March 30, 2015*

**Calculus **

A company decides to begin making and selling computers. The price function is given as follows: p=−70x+4000, where x is the number of computers that can be sold at a price of p dollars per unit. Additionally, the financial department has determined that the weekly fixed...
*March 30, 2015*

**Calculus **

The total cost (in dollars) of producing x golf clubs per day is given by the formula C(x)=500+100x−0.1x2. (A) Find the marginal cost at a production level of x golf clubs. C′(x) = (B) Find the marginal cost of producing 35 golf clubs. Marginal cost for 35 clubs =
*March 30, 2015*

**Calc**

Suppose that the cost, in dollars, for a company to produce x pairs of a new line of jeans is C(x)=2200+4x+0.01x2+0.0002x3. (a) Find the marginal cost function. (b) Find the marginal cost at x=100. (c) Find the cost at x=100.
*March 30, 2015*

**maths**

Paul wrote five tests which were marked out of a total of 200 marks. Paul scored 40 out of 50 in a 6th test. What was his NEW average? HoW do I work out this type of sum.
*March 30, 2015*

**math 7**

Describe an example of an event that has a probability of zero and an event that has a probability of 100
*March 30, 2015*

**phy 111**

20.d
*March 30, 2015*

**French**

I had to fill in the blanks of this phrase with the following words: Word Bank: radoucira, irons, fera, etre, doux, devraient, pleuvra Phrase: La semaine prochaine, il est certain qu’il ne ___(1)___ pas du tout. Il ___(2)___ certainement plus ___(3)___. Les tempé...
*March 30, 2015*

**Precalculus **

Find an equation of the circular orbit of a satellite 500 miles above the surface of earth. Place the origin of the rectangular coordinate system at the center of Earth and assume that the radius of Eatch is 4000 miles.
*March 29, 2015*

**Precalculus**

I don't know but that's why I'm asking on this website.
*March 29, 2015*

**Precalculus**

I haven't learned how to do this.
*March 29, 2015*

**Precalculus **

Find and equation of the circle with center at (0,0) that passes through the poijt (5,2)
*March 29, 2015*

**exponential equations**

6. Staphylococcus bacteria has a doubling time, d ,of 18 minutes. Calculate how long, t, it will take for the population to increase, from an initial population of 400 organisms, to 6400 organisms.
*March 29, 2015*

**exponential equations**

If a brand new Nissan Frontier pickup truck has a current value of $22 500 off the lot, calculate how long, t, it will take to depreciate to half of it’s current value. This particular model has a depreciation rate of 23%. Give answer to 2 decimal places.
*March 29, 2015*

**exponential equations**

The Sign Guys purchased a new hoist for $1' 500. If this particular hoist has an annual depreciation rate, r, of 15% calculate the value of the machine in 3 years time. Give answer to 2 decimal places.
*March 29, 2015*

**exponential equations**

Jen made an initial investment of $1000 into a T-Bill account. After 2 years, her investment totaled $1 175. Calculate the rate of appreciation, r, of the investment. Give answer to 2 decimal places.
*March 29, 2015*

**exponential equations**

The City of South Bay has a current population of 85 000. If the city is increasing at a rate of 7.25% per year, calculate the future population in 8 years time. Round to the nearest person.
*March 29, 2015*

**Calculus**

Solve without a calculator. cos(arcsin (3x/2)) I made a triangle but im stuck after that..
*March 29, 2015*

**Math**

I know you can use the formula. But I'd there another way?
*March 29, 2015*

**Math**

If the flight of a rocket can be modelled by the function h=-4.9t^2+49t+2.5. Where h is height in meters and t is time in seconds. How long was the rocket above 100m? I know that you have to find the two times when the rocket hits 100m. And then subtract them. But how do you ...
*March 29, 2015*

**Calculus**

The integral of [(x+3)/(x^2+9)] dx I think you split it into two fractions but im not exactly sure what to do.
*March 29, 2015*

**calculus**

When air expands adiabatically (without gaining or losing heat), its pressure P and volume V are related by the equation PV1.4=C where C is a constant. Suppose that at a certain instant the volume is 330 cubic centimeters and the pressure is 99 kPa and is decreasing at a rate ...
*March 29, 2015*

**Math**

Would my answer be wrong if I used it on a test?
*March 29, 2015*

**Math**

The rainbow bridge of Utah is a natural arch that is approximately parabolic in shape. The arch is about 88m high. It is 84m across the base. Determine a quadratic relation, in standard form, that models the shape of the arch My answer was y=-22/441x^2+88 But the textbook said...
*March 29, 2015*

**exponential equations**

The Bruce’s purchased $2500 worth of GIC’s. How long, t, will it take for the investment to increase to $3500, if the interest rate is 2.75%.
*March 29, 2015*

**Pschology 202**

The psychological term for mental activities in which we think, solve problems, and use language is called?
*March 29, 2015*

**Calculus**

Integral of [1/(sqrt(8+2x-x^2))] dx
*March 29, 2015*

**Chem**

SO2F2(g) has a ΔHºf = -858 kJ mol-1 and the S-F bond is 308.0 kJ mol-1 Determine the average S=O bond energy in SO2F2 in units of kJ.
*March 29, 2015*

**Calculus**

Th integral of tan(3x)dx
*March 29, 2015*

**Geometry check **

Find the perimeter and are of a regular truangle with an apothem of 9 ft. Is the perimeter 54 ft & the area 243 ft?
*March 29, 2015*

**Geometry help**

Find the perimeter, apothem, and area of a regular triangle with a radius of 6sqrt3. How do I do this?
*March 29, 2015*

**Pschology 202**

l
*March 29, 2015*

**Pschology 202**

lk
*March 29, 2015*

**Calculus**

If I were to find the derivative, would I derive ln y=(1-x)(lnx)? How would you derive this problem?
*March 29, 2015*

**Calculus**

How would you use logs?
*March 29, 2015*

**Calculus**

I did try and got it wrong and I'm unsure on how to go about the problem.
*March 29, 2015*

**Calculus**

Simplify using basic simplification. y=x^(1-x)
*March 29, 2015*

**Calculus**

Simplify using basic simplification. f(x)=ln[(sqrt(x^2+1))/(x(2x^3-1)^2)]
*March 29, 2015*

**Pschology 202**

After school, Raven enjoys going to the park to hang out with her friends and watch them do tricks on their skateboards. Every day, her friends encourage her to get a skateboard so that she can learn how to skate and do what they do. Eventually, Raven gives in and buys a ...
*March 29, 2015*

**Calculus**

Find the equation of the tangent line when x=2 for the functin f(x)=5^(x/2)
*March 29, 2015*

**statistics**

A simple random sample of a size n is drawn from a population that is normally distributed. The sample mean, x is found to be 110, and the sample standard deviation, s, is found to be 10. A- Construct a 95% confidence interval about u if the sample size, n, is 17
*March 29, 2015*

**math**

b= 18 inches Thanks for the help
*March 29, 2015*

**math**

The area of a triangle is 135 square inches. If the height is 15 inches, what is the length of the base?
*March 29, 2015*

**Chemistry**

10^3
*March 29, 2015*

**Math**

Jenna will use 1/3 of a piece of wood to make 4 shelves of equal size.
*March 29, 2015*

**math**

Stacy and Steve each have brownies of equal size,as shown. Stacy cuts her brownie into halves.Steve cuts his brownie into eighths. Which statement is true? A.Stacy has more pieces than Steve. B.Stacy has 4 pieces. C.Steve has smaller pieces than Stacy. D.Steve has fewer pieces...
*March 29, 2015*

**Shegal**

yes, it is coulomb's law. I assume the charges are left to right, 1,2,3 well the force on 2 from one is to the right(it repulses). the force on 2 from 3 is attractive, so it is to the right. So, the easy way is to figure the magnitude of each force, then ADD them, and the ...
*March 29, 2015*

**math**

Lexie divided these hexagons into 2 parts and shaded one part. Which shaded parts cover half the hexagon? A.only the shaded trapezoid B.both the shaded triangle and the shaded Pentagon C.only the shaded Pentagon D.both the shaded trapezoid and the shaded Pentagon And could you...
*March 29, 2015*

**chemistry**

What is the delta Hvap of a liquid that has a vapor pressure of 612 torr at 77.6 degrees C and a boiling point of 94.9 degrees C at 1 atm?
*March 29, 2015*

**chemistry**

What is the delta Hvap of a liquid that has a vapor pressure of 612 torr at 77.6 degrees C and a boiling point of 94.9 degrees C at 1 atm?
*March 29, 2015*

**math**

Problem: A riding stable manager is planning a nutritional diet for 9 horses. The manager finds the table below in a guide about horse health. The cost of 1000 Calories of horse feed is $0.25. What is the cost per day to feed 9 horses? (Hint: First, try writing an expression ...
*March 29, 2015*

**physics**

well, the upward component is 15 m/s, so the height is h(t) = 15t - 4.9t^2 So, just find the vertex of that parabola.
*March 29, 2015*

**Project management**

Build a PowerPoint® presentation that will address each of the Project Management Areas of Knowledge, the process groups that use these areas of knowledge, and how the process groups interact with the knowledge area processes. Use table 3-1, Project Management Process ...
*March 29, 2015*

**ALGEBRA**

Describe how you know if an inequality is an “and” or an “or” problem. (use -3 < x+5 < 8). Also, how do you know if an absolute value question is an “and” or an “or” problem? Lastly, will you always have two solutions to an ...
*March 29, 2015*

**statistics**

a repair shop believes that people travel more than 3500 miles between oil changes a random sample of 8 cars getting an oil change has average distance of 3375 standard deviation of 225 miles with alpha 0.05 is there enough evidence to support the shops claim
*March 29, 2015*

**math**

for f(x)=x^2+3 and g(x)=ãx find (f/g) (x) the domain (f/g)
*March 28, 2015*

**math**

50 feet of fencing is used to create a rectangular fenced-in region. if the length of the region is x, express the width, w, as a function of x
*March 28, 2015*

**History :)**

New England was a good starting place for American textile manufacturing for what reason? A)There were no ports within easy access. B)It was the birthplace of Frances Cabot Lowell. C)Rocky soil made the area inadequate for farming. *** D)Most manufacturing products were being ...
*March 28, 2015*

**Chemistry**

Thank you!!
*March 28, 2015*

**rela 10H**

requirenment for essay: Attention-grabber: Relevant quotation Create imagery to evoke imagination Fragment & general discussion Hypothetical question Who/what/when/where/why/how the mystery began (why is it mysterious?) Ask the question from the list of choices Briefly (one or...
*March 28, 2015*

**statistics**

If I selected one player at random what would be the probability of an NBA player in the Eastern conference being less than 6 feet tall? First calculate the z-score and then use the standard normal table to find the probability.
*March 28, 2015*

**Language art **

In the multi-draft reading process, what does a reader look for in the second reading of a drama A. The theme of the drama B. How each scene moves a story forward C. When and where the action takes place D. The internal and external conflict
*March 28, 2015*

**statistic**

A statistics quiz consists of 10 multiple questions. There are four choices for each question. One student is unprepared and decides to guess the answers to every question. Assuming 70% is a passing grade, find the probability that the student will pass the quiz.
*March 28, 2015*

**Math**

Find the exact value of the sine, cosine, and tangent of the angle 330 degrees. I know the tangent is -(square root 3)/3, but how?
*March 28, 2015*

**chemistry**

14-9.65=4.35 POH log (0.27/.7675)= -.454 + 4.35= 3.89 10^ (-3.89)= 1.28 E-4 M
*March 27, 2015*

**chemistry**

i did not get the answer
*March 27, 2015*

**biochemistry **

if you dissolve 9 mg of glucose in 5 ml of water .what is the concentration of glucose in %w\v the resulting solution?
*March 27, 2015*

**Chemistry**

C2H5OH(l) + 3 O2(g) -> 2 CO2(g) + 3 H2O(g) During an experiment 10.00 g of ethanol is completely burned in air to release CO2(g) and H2O(g) as shown in the equation above. During the combustion, 296.6 kJ of heat energy is released. What is the molar enthalpy of combustion...
*March 27, 2015*

**Language Arts**

Is it D
*March 27, 2015*