# Questions Asked onJune 13, 2007

1. ## Geometry

Given: ABCD is a parallelogram;

2. ## Economics

Which of the following statements would come from someone classified as unemployed? A. I'm not working. I had three interviews this week, and I'm trying to find a job. B. I haven't had a job in a year, and I stopped looking for a job nine months ago. C.

3. ## Math

Use the quadratic formula to solve each of the following quadratic equations... 1. 2x^2-5x=3 2. 3x^2-2x+1=0 Rearrange the equation in quadratic formula form. 2x^2 -5x -3 = 0 Then use the formula. Tell me what you don't understand about it if you don't know

4. ## Chemistry

Using the half- reaction method, balance the redox reaction shown below. (I-)+(Br2) ---> (IO3-)+(Br-) Step 1. Break the reaction into the two half reactions. Br2 ==> Br^- I^- ==> IO3^- Step 2. I will leave the first one for you to do. The second one is

5. ## math

ANGULAR SPEED OF A RACE CAR. A race car is driven around a circular track at a constant speed of 180miles per hour. If the diameter of the track is 1/2mile, what is the angular speed of the car? Express your answer in revolutions per hour(which is

6. ## Calculus

A steady wind blows a kite due west. The kite's height above ground from horizontal position x = 0 to x = 80 ft is given by the following. y = 150 - (1/40)(x-50)^2 Find the distance traveled by the kite. y = 150 - (1/40)(x-50)^2 y = 150 -

7. ## Math

Solve each of the following quadratic equations by completing the aquare. 1. x^2-6x-3=0 2. 2x^2+10x+11=0 Step 1. Move the constant to the other side. X^2 -6x + ?? = 3 + ?? To find ??, take 1/2 the x term and square it, then add it to both sides; therefore,

8. ## socials studies

this is basically an exam essay that we can take home to do and i need serious help in order to pass this course. was the british government laissez-faire policy during the industrail revolution necassary? discuss the advantages and disadvantages of this

9. ## math

How would you establish this identity: (1+sec(beta))/(sec(beta))=(sin^2(beta))/(1-cos(beta)) on the right, sin^2 = 1-cos^2, that factor to 1-cos * `1+cos, then the denominator makes the entire right side 1+cosB which is 1+1/sec which is 1/sec (sec+1) qed

10. ## chemistry

is C8H7O2COONa an acidic salt or basic salt? basic because the C8H7O2 is a weak acid, and Na is part of a strong base.

11. ## Communications

Rewrite the following sentences, focusing on the grammar area specified in the left column. To enter your answer, click next to the number and begin typing. If the sentence is already correct, write No Change. Punctuation within Sentencesâ€”Colon

12. ## Calculus

Graph the curve and find its exact length. x = e^t + e^-t, y = 5 - 2t, from 0 to 3 Length = Integral from 0 to 3 of: Sqrt[(dx/dt)^2 + (dy/dt)^2] dx/dt = e^t - e^-t, correct? dy/dt = -t^2 - 5t, correct? So: Integral from 0 to 3 of Sqrt[(e^t - e^-t)^2 +

13. ## calc: simpson's rule & arc length

i'm still getting this question wrong. please check for my errors: Use Simpson's Rule with n = 10 to estimate the arc length of the curve. y = tan x, 0

14. ## math,help

this is from another section one of the problems can someone help me. dierections: use the simplex method to solve each linear programming problem. maximize z = 12x1 +15x2 +5x3 subject to: 2x1+2x2+x3 =0,x3>0

15. ## Calculus

A steady wind blows a kite due west. The kite's height above ground from horizontal position x = 0 to x = 80 ft is given by the following. y = 150 - (1/40)(x-50)^2 Find the distance traveled by the kite. y = 150 - (1/40)(x-50)^2 y = 150 -

16. ## Physics

How would you use a pulley system with one rope to pull at a single item at two points simultaneously? The free ropes of two block and tackle pulley systems could be joined to pull an object in two places. Or you could just hang a rope over two pulleys on

17. ## Algebra

Find two consecutive positive integers such that the sum of the square is 85..(show your work) If X is the first integer, then X+1 is the next; therefore, the sum of those squares will be 85. X^2 + (X+1)^2 = 85 Solve for X, then add 1 to it for the second

18. ## math , help

can someone show me how to solve this: directions: pivot once as indicated in each simplex tableau. Read the solution from the result. the number that is highlighted is row 2 column 3 which is the 5 the matrix is a 4 X 8 under column one it reads as:

19. ## social studies

Where can I find information on: "What products might we get from the seven major regions of the United States?" (Great Lakes, Mountain, Southwest, Northeast, Plains, Pacific, Southeast) This encyclopedia article discusses the regions of the U.S. The

20. ## Financing

Please..I need help asap If a firm pays its bill with a 30 day delay, what fraction of its purchases will be in paid in the current quarter? Please show me how you get this answer Since a quarter is three months long, then 2/3 of the firm's purchases are

21. ## OChem Nomenclature

Here is a compound that I am trying to name... H H \ / C || CH3-CH2-C-CH2-CH2-CH2-CH3 I came up with 3-methylheptene, but the answer says 2-ethyl-1-hexene. Can someone please explain why I'm wrong? Thanks that showed up wrong - the methyl with the double

22. ## chemistry

In the lab, 20.0 g of sodium hydroxide is added to a beaker giving it a total mass of 128.4 g. Sulfuric acid is added until all of the sodium hydroxide reacts. After heating, the total mass of the beaker and the dry compound is 142.3 g. Caculate the

Solve for X. x^2+4x+4=7 (Hint: Factor the left hand side) I got stuck on this one, please help!!!Thanks in advance Take the hint. Factor the left side. (x+2)^2 = 7 Take square root of both sides. x+2 = sq rt 7 etc .

24. ## computer graphics

You purchase the latest "must have" computer video game from the store. The game has fantastic graphics but it runs rather slow on your computer. What must you do to increase the performance of the game? 1. Install a GVA adapter that has more ROM. 2.

25. ## science(physics)

a object potential energy is described as 1/2kx^2. what does k and x represent? thanks. This is the PE in a stretched spring. k is the spring constant, x is the distance the spring is stretched (or compressed). Read up on Hookes' law.

26. ## math

a=3,b=2,c=2 would this make a triangle? if so, how would i find the angles? thanks for helping. You would find the angles using the cosine law. When all three sides are given to a triangle, you can solve for each angle.

27. ## Geometry

Angle DEF is similar to Angle HJK and the scale factor of angle DEF to anle HJK IS 5/2. If EF =15 FIND JK Here is what I came up with Am I correct 5/2 = EF/JK 5/2 =15/JK 5(JK)=30 JK=30/5 JK=6 Thanks much

28. ## Calculus

What is wrong with the following reasoning??? f(x) = 2^x f'(x) = x[2^(x-1)] Although n x^(n-1) is the derivative of x^n, you cannot apply similar rules when x is the exponent and the number being raised to a power is a constant. The derivative of b^x,

29. ## written communication

What steps would you take to ensure that the purpose of your message (whether informative, negative, or persuasive) is conveyed to your readers? When things are given in an order, humans generally remember the first and last objects in the series better.

30. ## math,help

and then this one as well : state the dual problem for each linear programming problem. minimize w =y1+y2+4y3 subject to: y1+2y2+3y3 >=115 2y1+y2+8y3>=200 y1 +y3 >=50 with y1>=0, y2>=0, y3>=0

31. ## Math

Is there any way that you can find the area of a circle without using pi? Well, since you can also use the formula pi r^2, any such method would be equivalent to calculating pi in some way.

32. ## Math Help

Directions are that i have to solve the equation and graph it using words.I have to include whether itis a solid or dotted line and which way the shading is. Problem: -2x+3y

33. ## chemistry

How can I convert 350mg/L into mg/kg with 22.28% moisture? You need to clarify the question. 350 mg/L of what and what does 22.28 moisture have to do with the problem?

34. ## Art

Discuss a minimum of two reasons why Jackson Pollock's Convergence is a work of "fine art" as opposed to an arbitrary composition of paint. Establish a very strong "argument" for this artwork by first establishing what defines "fine art." Support your

35. ## Climate Change

In a Business 'As usual senario,' global CO2 emissions reach 64 GtCO2 y -1 by 2050. Convert this figure to GtC y-1, and calculate the percentage increase from the level of global CO2 emissions in 2004, estimated as 8.8 GtC y-1. Lets see... carbon is what

36. ## physics

sorry mr bob pursley to annoy you again. i read over hooke's law in wikipedia.but i don't know what is k.(my force constant. here my experiment and my values. i did three trials measured force applied of the elastic by streching 50 cm everytime. force

37. ## Algebra

In my Algebra class I am working with rational expression. I know it is important to understand the differnce between a factor and a term of an expression. Can someone give me the definition for both and explain to me the difference between the two?

38. ## math

how would i write this in scientific notation 14,718? how would i write this in standard notation 1.98 x 10 to the second power 14,718 could be rewritten as 1.4718*10^4, which is read as "1.4718 times 10 to the fourth power." (The asterisk is often used as

39. ## Physics

A 1.00 g mass hangs by a string next to an identical stationary mass. When both masses are given identical positive charges, the hanging charge swings out 3.00 cm from the vertical so that its string makes an angle of 30.0 degrees with the vertical. Find

40. ## physics

find the average of a block being propelled propelled by an elastic band. very sorry to disturb Mr bobpurlsey again. i am very thankful to you replies. the only problem that lies in the answer is that i haven't been taught hooke's law in Grade 11. which

41. ## CALC 2 - Partial Functions!!

How do I solve Integral of 7/(16-x^2) I know I must break down (16-x^2) into (x+4)(-x+4), but after I do that what is next? Using the method of partial fractions, convince yourself that 7/(16-x^2)= (7/8)*[1/(4+x) + 1/(4-x)] The two additive terms can be

42. ## criminology

what are the characteristics of the juvenile court system? We will be happy to critique your thinking. Be careful of generalizations here on fairness, etc. Courts vary very widely on how well the operate. What i am looking for are the general