# Questions Asked onJuly 20, 2014

19. ## mat/117

Select the approximate values of x that are solutions to f(x)=0, where f(x)=-8x^2+7x+2

20. ## Math

Solve the inequality for x. 29> 5+4x -

21. ## Math 221

2 is less than y , and 7 is greater than y or equal to Use only once in your inequality.

22. ## physics

Fred and George who are identical twins (same body mass) are competing in aerial skiing. Fred hits the take off with a speed of 20 whereas George has a speed of 8.5. How much higher will Fred go?

23. ## math

The distriubution of the SAT scores in math for an incoming class of business students has a mean of 580 and standard deviation of 25. Assume that the scores are normally distributed. a. Find the probability that an individual's SAT score is less that 550.

24. ## physics

A diver with a mass of 51 kg reaches a maximum height of 5.8 m above the water. When the diver has fallen 2.8 m from the apex, what is her kinetic energy (J)? Assume horizontal velocity is zero.

25. ## Math 221

Solve the inequality for v. 6v+6 > -30 -

26. ## Math 221

Write the following as an inequality. 9 is greater than y , and is less than or equal to y

27. ## Chemistry

The combustion reaction of Mg +1/2 O2-->MgO produces a very bright white flame and high heat. Verify that the following reactions produce the same overall reaction: a) MgO+2HCl-->MgCl2+H2O b) Mg+2HCl-->MgCl2+H2 c) H2+1/2O2-->H2O ΔH°= -285.8 KJ/mol

28. ## Math 221

Solve the inequality for v. 6v+6 > -30 - >Greater than or less than symbol -

29. ## chem

How many moles of carbon, hydrogen, and oxygen are present in a 100-g\rm g sample of ascorbic acid?

30. ## algebra

2/w+ 4/w-1 = 10/w(w-1) 2(w-1)/w(w-1) + 4w/w(w-1)=10/w(w-1) 2w-2/w(w-1 +/4w/w(w-1= 10(w-1)/w(w-1) 2w-2+4w=10w-10 2w+4w-10w=-10-2 6w-10w=-10-2 -4w=8 w=2

31. ## Chemistry

If 1.5g of CaO is mixed with 2.5M HNO3 how many moles of CaO were reacted and what type of reaction is this ?

32. ## chemistry clearly step by step

Al2(s04)3 solution of 1 molal concentration is present in 1 litre solution of 2.684g/cc.How many moles of bas04 would be precipitation on adding bacl2 in excess? The answer 6M I do not understand pls explain step by step Thank a lot all tutors

33. ## college statistics

The CEO of ABC manufacturing commissioned a study to look at the differences between the current salaries of her employees (n = 474) and their starting salaries. The study collected current and beginning salary data for each of the 474 employees and the

34. ## Physics

If you mix 100 grams of water at 20 degree centigrade with 100 grams of water at 40 degree centigrade, what do you think the final temperature of the mixture will be? Why?

35. ## College math

7) A rectangular pen can be constructed using the side of a barn as one boundary and 5500 ft. of fence to make the other three sides. Find the length and width of the rectangle to make the largest area. Hint: Draw a picture- and label the sides of the

36. ## College math

A rock is thrown from the top of a tower that is 400 feet tall. If its height above the ground can be modeled by h = -16t2 + 64t +400 where h is in feet, and t is in seconds. To the nearest tenth of a second, how long does it take the rock to reach the

37. ## Math

I need to use the Gaussian Elimination to solve a system of equations, but I have no idea on how to do that. I remember doing these in high school, but since its been a while I can't remember exactly how to do it. Here's the system of equations I need to

38. ## science

A hoop of mass M = 4 kg and radius R = 0.4 m rolls without slipping down a hill, as shown in the figure. The lack of slipping means that when the center of mass of the hoop has speed v, the tangential speed of the hoop relative to the center of mass is

39. ## Statistics/Probability

A component is rejected if its has a diameter less than 70mm, reworked if the diameter is between 70 and 73.5mm or more than 78.5mm. The diameter of a component is normally distributed with a mean 76mm and standard deviation 2.5mm. In a batch of 400

40. ## Technology & Society

According to the text, by 2050, it is believed that __________ of the earth's species will become extinct if rain forest destruction continues. A. 6% B. 14% C. 25% D. 50% I think it's C., but not sure

41. ## Algebra

I need some help solving this system of equations: 5x - y = 18 –4x – 2y = –6

42. ## Algebra

Help! I have no idea how to graph this linear equality! x - y is greater than or equal to 2

43. ## Math

I need some help with solving this problem: Find the solution set for the system of linear inequalities. x – y ≥ 3 x + 2y ≥ 6

44. ## Algebra

How exactly am I supposed to find the slope of the line passing through the points (–3, 4) and (–2, –9)?

45. ## chem

With two dice, each numbered 1-6, there are two possible ways to roll a 3: Thus, for the outcome of 3 (a particular macrostate) there are 2 microstates. How many possible ways are there to roll a 6?

46. ## Finance

Financial Analysis of the McDonalds Company Stock ticker symbol, exchange where traded _________ Address of company headquarters _________ Company phone number __________ Your name, etc. PART 1, COMPANY OVERVIEW: a. Brief description of the company (one

47. ## Maths lit,tourism.agricultural , life science

Which career do i qualify to study with these subjects at TUT or collega

48. ## Physics

Three spheres are made from the same material, but each has a different size and temperature. The radii of spheres A, B, and C are 1.5R, R, and 1.25R, respectively. Which of the following choices gives the correct ranking of the spheres in order of least

49. ## Physics

The drawing shows three cylinders that have the same length and cross-sectional areas, but each is made of different material. The cylinders are arranged in series, so that heat is conducted from the left toward the right. The temperatures at the

50. ## Physics

An ideal gas is contained within closed box behind a removable wall. The walls of the container are insulated, so that no heat may be transferred from the system. Initially, the gas has an initial pressure P and an initial temperature T. The gas is then

51. ## Physics

Consider an ideal gas enclosed within a container with a moveable piston and a valve through which additional ideal gas can be added to the container. Which one of the following actions may not result in an increase in pressure? Increase the temperature,

52. ## chemistry

a. Determine the density of a cube of copper with a length of 5.00 cm and a mass of 1,112.50 g. b. Calculate the number of atoms in the cube

53. ## Math

Financial aid students must pass 2/3 of their courses each term in order to continue their aid. If a student is taking 18 hours, how many hours must be passed?

54. ## logic crtical thinking

Explain why it is important to analyze each financial transaction of a business and to report it in the Accounting Information System.

55. ## statistics

Wages and salaries make up only part of a total compensation. Other parts include paid leave, health insurance, and many others. In 2007, wages and salaries among manufacturers in the United States made up an average of 65.8% of total compensation. To

56. ## science

1o grams of caster sugar dissolved in 25 degrees long to does it take.

57. ## Applied Mathematics (Perturbation)

Solve these questions by using Algebraic Perturbation series method using this series U = U_o + e U_1+... 1. eU^3+U-2=0 2. eU^3+(U-2)=0 3. eU^4+U^3-2U^2_U+2=0 4. U^2-U-2+e/2(U^2+2U+3)=0 5. eU^4-U^2+3U-2=0 6. eU^4-U^3+3U-2=0 7. eU^4+U^2+2U-1=0 8.

58. ## algebra

The width of a rectangle is three-fourths its length. If the perimeter is 100 ft, find its dimensions

59. ## physics

a body is pulled over a surface by applying 20 Newton making an angle 60 degree with the horizontal.if the body moves with constant speed on a rough surface on which coefficient of friction is .4 then the mass of the body is?

60. ## statistics

what sampling strategies can be used if the maximum number of students she can include for her survey of 400 and the maximum number of students she can include for her interviews is 20.”

61. ## phi

Which of the following does Peter Singer assert about the principle of equality? (Points : 1) People should have equal rights because they are factually equal. People with higher abilities, it stands to reason, should have greater rights. Different groups

62. ## Math

The Timuga swimming pool, of Manila City has two pumps it uses to fill the pool. If one pump takes 12 hours to fill the pool and the other pump alone takes 16 hours to fill the pool, how long will it take both pumps working together to fill the pool?

63. ## Math

Christian drives 120 miles in the same length of time while Julius drives 200 miles. If the speed of Julius exceeds that of Christian by 35mph, find the speed of each

what is the concrete and specific words in this sentence, "John lost a fortune in Las Vegas"

65. ## Physics

A body which has three forces acting on it is in equilibrium. One force is 3N to the North, and another is 4N to the west. Find the magnitude and the direction of the third force. Show the vector diagram.

66. ## physics

I have no idea I need help!!!!

67. ## physics

A copper container of mass 100g contains 500g of water. A steel paddle of mass 85g stirs the water. A pulley system operates the paddle. A) the mass (15kg) drops 2,4m, turning the steel paddle. Assume heat lost to surrounding is negligible. 1. Find the

68. ## algebra 2

x-5 divided by 2 = x-3 divided by x x(x-5) = 2(x-3) x^-5x=2x-6 x^ -7x +6 =0 (x+1) (x-6) x=-1 x=6

69. ## algebra

average weight of a+b=45 average weight of b+c=43 average weight of a+c=50 what is the average of a,b,c

70. ## algebra 2

3/y-2 -1/y=4/y^-2y 3y/y^-2y - y/y^-2y=4/y^-2y 3y-y=4 2y=4 y=2