Monday

April 21, 2014

April 21, 2014

Total # Posts: 95

**Statistics**

Hi, Are market returns (with numbers such as -3.45, 4, 2.456 representing the "returns") ordinal or nominal data? Thanks!

**Chemistry**

Calculate the number of moles of ag in 5ml of .004m agno3 and the number of moles of cr04 in 5ml of .0024m k2cro4

**Economics**

According to the following game tree, and if the entrant and incumbent both only care about their own monetary payoff, what is/are the game's Nash equilibrium? Entrant - stays out (2,15) - enters If the entrant enters, Incumbent - co operates (5,5) - punishes (-3,9) So wha...

**finance **

Calculate the IRR of the following project: Year Cash Flow 0 -$30,000 1 $40,000

**L.O**

identify and describe 3 environmental heath hazards that cause ill health,crises,and or any other community within south africa and globally.

**Math**

When f(x)is divided by x-1 and x+2,the remainders are 4 and -2 respectively . Hence find the remainder when f(x)is divided by x^2+x-2 .

**Economics**

Hi, The demand for inflatable garden gnomes is given by P = 300 – 2Q, while the supply of is P= 100 + Q/2. How many garden gnomes are traded in equilibrium? I found the answer to be Q = 80. The related question was the one I had difficulty with: Suppose that the market fo...

**algebra**

Which property would allow you to use mental computation to simplify the problem 27 + 15 + 3 + 5?

**physics**

Mason lifts a box off the ground and places it in a car that is 0.50 meters high. If he applies a force of 8.0 newtons to lift this suitcase, what is the work done?

**gvernemnt**

purpose of a filibuster is to

**Physics**

A soccer player kicks a football frombground level with an initial velocity of 27.0m/s, 30deg. Solve for the: A. Ball's hang time B. Range C. Max Height Ignore air resistance. (Hint: hang time refers to the time the ball is in the air.)

**financial management**

Suppose you invest $2,500 in an account bearing interest at the rate of 14% per year. What will the future value of your investment in six years?

**Math**

Use mathematical induction to prove that 2^(3n) - 3^n is divisible by 5 for all positive integers. ThankS!

**maths urgent please**

a particle moves in a straight line such that its position x from a fixed point 0 at time 't' is given by x= 5 + 8sin2t + 6cos2t 1. Find the period and amplitude of the particle. 2. Find the greatest speed of the particle. Could you please explain the steps on how to g...

**maths urgent please**

the chord PQ joining the points P(2p, p^2) and Q(2q, q^2) on x^2 = 4ay always passes through the point A(2,0) when produced. show that (P+q) = pq thanks!

**Math**

A particle is projected horizontally with velocity V m/s, from a point h meters above ground. Taking g ms^-2 as the acceleration due to gravity, 1. Show the equation of the path is given by y = (2hV^2 - gx^2)/ 2V^2 2. Find the range of the particle. Thanks

**Math**

By using the expansion (1 + x)^2. Prove 8[sigma notation]k=0 2^(3K)(N K) = 3^(2n). Thanks

**Mathematics**

Can you please explain how to get the answers please?

**Mathematics**

a particle moves in a straight line such that its position x from a fixed point 0 at time 't' is given by x= 5 + 8sin2t + 6cos2t 1. Find the period and amplitude of the particle. 2. Find the greatest speed of the particle. Thanks

**maths **

by equating the coefficients of sin x and cos x , or otherwise, find constants A and B satisfying the identity. A(2sinx + cosx) + B(2cosx - sinx) = sinx + 8cosx I got A = 2, B = 3, which the answers said were correct. However, another part of the question asked hence integrate...

**Math**

Prove by induction that 9^(n+2)- 4n is divisible by 5 for n greater than or equal to 1. Thanks.

**maths **

A box contains 20 balls, of which 5 are red, 5 are blue, 5 are white and 5 are green. Suppose a sample of 5 balls are chosen without replacement. a) find the probability that the sample contains balls of all the same colour (answer is 4/ 20C5, but why isnt it 5/20C5??) b) find...

**Math**

Find the probability that if the letters of the word "parallel" are randomly arranged that the L's will not be together. In class, I'm studying permutations and combinations. The solutions stated the no. of permutations where 3 L's are together is 6!/2!. ...

**Economics**

Find the future value one year from now of a $7,000 investment at a 3% annual compound interest rate. Also calculate the future value if the investment is made for 2 yeaars?

**MATH**

You are interested in finding out if a student’s ACTscore is a good predictor of their final college grade point average(GPA). You have obtained the following data and are going to conduct a regression analysis. Follow instructions on page 324 of your textbook under line ...

**math**

could you please help with this question :) Find the speed and direction of a particle which, when projected from a point 15 m above the horizontal ground, just clears the top of a wall 26.25 m high and 30 m away. Thanks in advance

**math**

A batsman hits a cricket ball 'off his toes' towards a fieldsman who is 65 m away. The ball reaches a maximum height of 4.9 m and the horizontal compoenent of its velocity is 28 m/s. Find the constant speed with which the fieldsman must run forward, starting at the in...

**Math**

A batsman hits a cricket ball 'off his toes' towards a fieldsman who is 65 m away. The ball reaches a maximum height of 4.9 m and the horizontal compoenent of its velocity is 28 m/s. Find the constant speed with which the fieldsman must run forward, starting at the ins...

**Math**

Hi, could you please help with this question :) Find the speed and direction of a particle which, when projected from a point 15 m above the horizontal ground, just clears the top of a wall 26.25 m high and 30 m away. Thanks in advance

**Finance**

13.4%

**Math**

Evaluate the integral from 0 to sqrt3 cot^-1(x) dx. Thanks :)

**Math**

The region above the curve y = sin^-1(x), (0 greater than or equal to y greater than or equal to pi/4), is rotated about the y-axis through a complete revolution to form a solid. Evaluate the volume. Thanks!

**Math**

Evaluate the integral from 0 to 4 of (x+1)/(16+x^2) dx the answers are log(sqrt2) + pi/16 Could you please take me through how to get to that answer please, thank you very much!

**general chemistry**

How much heat in kilojoules is evolved in converting 1.50moles of steam at 150 degrees celcius to ice at -60.0 degrees celcius? The heat capacity of steam is 1.84J/g degree C and that of ice is 2.09J/g degree C.

**math**

the lawn order lawnmower factory can produce 12 lawnmowers in 8 hours. How many hours will it take the actory to produce 30 lawnmowers.

**Math**

I have a box that is 15cm-wide, 10cm-long, and 3cm- wide. To get it's volume I would add all the sides. Thanks

**English **

Hi, I have to write up paragraphs on these themes from Frankenstein: a) good vs. evil (manichean) b) duty of responsibility c) nature vs. nurture However, I'm confused about what the differences between these points are... For example, in "nature vs. nurture", wo...

**Math **

A circular piece of wire has a radius of 12 cm. This is cut then bent to form an arc of a circle whose radius is 60 cm. Find the angle subtended at the centre by this arc. Give your answer to the nearest degree. Please show working out Thank you so much!

**Maths **

What is the area of the minor segment cut off a circle of radius 10 cm by a chord of length 12 cm? Could you please show me the working out for this question? The answer in the textbook is 16 sq cm. Thanks!!!

**Economics**

Explain how the emergence of the global marketplace has been linked to increased integration of the world’s economies. I think globalisation is involved, how can I structure my answer? Thanks!

**Economics**

Explain why quotas are more effective than tariffs. Thanks! :)

**Math- integration**

Find the area bounded by x^(2/3) and x= y^2 in the first quadrant. (I've worked out the x intercepts to be 0 and 1 in the first quadrant, but how would I find the area?) thanks :)

**Maths : circular motion**

1. A 3 metre piece of string is threaded through a hole in the table. If equal portions of the string are above and below the table, and the top mass of 2kg rotates at 1rev/sec , how fast does the bottom mass of 1kg rotate? (in rev/sec) 2. If, in the above question, the two ma...

**Maths - Circular Motion **

One end of a string of length 1m is attatched to the rim of a 2m radius disc while the other end carries a mass of 5kg. If the tension in the string may not exceed 300N. find the maximum speed w in radians/sec and the corresponding angle of inclination of the string to the ver...

**math**

let x be the number of horses, and y be the number of riders: x + y = 36 ........(1) 4x + 2y = 104 .....(2) Solving simultaneously, (1) x 2 2x + 2y = 72 ....(3) (2) - (3) 2x = 104 - 72 = 32 thus x = 16 When x = 16, [sub into (1)] y = 20 Therefore there are 16 horses and 20 rid...

**biology: genetics**

In Drosophila melanogaster, cut wings (ct) is recessive to normal wings (ct+), sable body (s) is recessive to gray body (s+), and vermilion eyes (v) is recessive to red eyes (v+). All three recessive mutations are X- linked. A female fly with cut wings, sable body, and vermili...

**math**

-2(x+5)(x-43)

**english**

ok :)

**english**

ok thanks

**english**

We use wikipedia. Do you know of any other helpful websites????????

**english**

My question is about sasquatches. I just want to know if they are real. Is there someone who can answer this question??

**physics**

A baseball mass of 150.0g, is thrown by the pitcher toward the home plate with a velocity of 45.0 m/s. it is hit back at the pitcher with a velocity of 60.0 m/s, what is the average force on the bat, if the ball and bat are in contat for a time of 100.0 ms? What is the change ...

**vocabulary**

which of these words probably comes from the latin word conducere, meaning to lead together?? complete,control,convince, conduct?

**chemistry**

Consider the following multistep reaction: C+D-> <-CB (FAST) CD+D->CD2 (SLOW) CD2+D->CD3 (FAST) C+3D->CD3 (OVERALL) Based on the mechanism determine the rate law for the overall reaction??

**Chemistry**

consider the following reaction mechanism 2A+B->B+C B+D->E+C What is the rate law for step 2 of this reaction?

**algebra**

cubed square root 16x^2y over cubed square root 2xy^2

**Chemistry**

To what volume should you dilute 25mL of a 12.0M H2SO4 solution to obtain a 0.170M H2S04 solution?

**Biology**

What is the advantage of producing single sex gametophytes (heterospory) and what is the advantage of producing a bisexual gametophyte (homospory)?

**Science**

What physical process is being observed using spectroscopic measurements in Beer's Law experiment?

**Math**

6eggs in 7days. find the unit rate

**science**

why did the balance record a decrease in mass during the reaction betwwn iron sulphide and hydrochloric acid?

**Calculus **

find the area of the region. 2y=4sqrtx , y=3 and 2y+2x=6 ?

**american government **

Some analysts maintain that the United States is poorly served by a Congress that is often beset by inaction and localism. Supporters of the Congress maintain that the institution is a superior deliberative and representative institution. Which argument is the more persuasive ...

**Math**

Evaluate can you please show me the steps. -3/4-3/16

**Algebra 1**

m(squared)-8m+n Find the value on n such that each expression is a perfect square trinomial.

**Chemistry**

A sample of solid Ca(OH)2 is stirred in water at 30°C until the solution contains as much dissolved Ca(OH)2 as it can hold. A 100.-mL sample of this solution is withdrawn and titrated with 5.00 X 10^-2 M HBr. It requires 48.8 mL of the acid solution for neutralization. Wha...

**Math**

Is (-1,5) a solution of each system? X+y=4 x=-1

**English**

Is the grammar right in this. It's bullet pointed in a resume. Should all those different words be capitalized or lower cassed? Oversee plant operation of Meat Dept, Pantry, Sauce Room, Bakery, Security, Shipping/Receiving and Sanitation

**Eli whitney**

American inventor Eli Whitney (1765–1825) designed the cotton gin (a machine that separates raw cotton fibers from their seeds) after he visited a Georgia plantation and observed the difficult process of separating seeds from fibers on the cotton boll (flower). Cleaning c...

**Eli whitney**

First, the cotton balls were put into the top of the machine. Next, you turn the handle, which turns the cotton through the wire teeth that combs out the seeds. Then the cotton is pulled out of the wire teeth and out of the cotton gin.

**english**

What does it mean when a writer narrative structure is a spiral and what does it mean when a writers narrative structure is webbed?

**Orgo**

thanks

**Orgo**

How do I know which cyclohexdiene (?) is more stable? There's one where the double bonds are directly opposite each other (1,4) and another where they are almost next to each other but skip one side (1,3).

**Chemistry!**

1) does an increase in temperature increase the rate of bothe exothermic and endothermic reactions? 2) is the reaction between sodium thiosulphate and hydrochloric acid self-sustaining? This is for a practical investigation and im battling to find answers..any help greatly app...

**math**

Find the number of solutions to the equation 2x + 5y = 2005, where x and y are positive integers. Thank u :)

**maths**

Let X and Y be positive integers such that X^2 + 3X + Y^2 = 404. What is the value of X + Y^3? Find all possible solutions. Thanks! :)

**maths**

Let ABCD be a square with side legnth 7cm. Another square KLMN is inscribed into ABCD such that its vertices lie on the sides of ABCD. Find the lenghts of parts of ABCD sides which are divided by the vertices of KLMN. If [the area of KLMN]: [area of ABCD] = 25:49

**maths**

A positive integer n is such that numbers 2n+1 and 3n+1 are perfect squares. Prove that n is divisible by 8. thanks

**Maths**

How do you find the gradient of a curve??

**physics**

what is the symbol for speed and what unit of measurement is used?

**math**

dependant variable relies on something whereas an independant variable is not reliable on anything Independent variable) causes a change in (Dependent Variable) and it isn't possible that (Dependent Variable) could cause a change in (Independent Variable). For example: (Ti...

**Physics**

what is the weight of a 10g object? this is my answer: W = m.a W = 0,01(9.8) W = 0,098 kg i divided the 10g by 1000 to conver it into kg. is this answer correct?

**physics**

questoins asked in a physics lesson which i find hard to answer: 1) do all objects have the same acceleration when they fall to earth? explain the answer. 2) what is the difference between weight and mass? any help would be greatly appreciated :)

**Accounting**

what section of accounting is this in? tax maybe?

**dividing monomials**

your answer is 1 divided by 2a(2)power b(12)power c(11) power

**Physics**

thank you drwls :)

**Physics**

i dont understand why the 600km doesnt get incorperated into the calculations??

**Physics**

a plane can fly at 200km/h in still air and has to reach a destination 600km north-east. a 50km/h wind blows from the west. in which direction must the plane head?

**Biology**

how are the anthers of a flower adapted to distribute pollen?

**Business Ethics**

i'm looking for the actual article not what another student has written can u tell me where to find the actual article?

**Algebra 1**

3r-5s=-35 2r-5s=-30 multiply equation 2 by -1 then add the two equations. s will cancel and you can solve for r. Post your work if you need further assistance.

**further mathematics**

The roots of the eqn, x^4 + px^3 + qx^2 + rx + s = 0 where p, q, r, s are constants and s does not equal to 0, are a, b, c, d. (i) a^2 + b^2 + c^2 + d^2 = p^2 -2q (in terms of p & q) (ii) 1/a + 1/b + 1/c + 1/d = -r/s (in terms of r & s) (iii) using the above results, or otherw...

**Biology**

Are the molecules of water moving closer together toward one another or farther apart as water freezes? Explain. Your exact question is taken up by several knowlegable people and answered at the following site: (Broken Link Removed)

**Econ**

What is the optimal level of enrollment at the tuition price of $5000.00 Enroll until the marginal cost of the next student equals $5000.

**what is a catch 22**

what does it mean when someone says something is a catch 22; does this refer to the book? Whenever you wonder about a phrase's or a word's meaning, first you should try looking it up at www.onelook.com. I did this for "catch 22" and here are the results: http...

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