tatiana

Most popular questions and responses by tatiana
1. Expected Value?

A company estimates that 0.4% of their products will fail after the original warranty period but within 2 years of the purchase, with a replacement cost of \$300. If they offer a 2 year extended warranty for \$46, what is the company's expected value of each

2. Expected Value? Help

Kyd and North are playing a game. Kyd selects one card from a standard 52-card deck. If Kyd selects a face card (Jack, Queen, or King), North pays him \$4. If Kyd selects any other type of card, he pays North \$3. a) What is Kyd's expected value for this

3. Expected Value

A bag contains 2 gold marbles, 7 silver marbles, and 23 black marbles. Someone offers to play this game: You randomly select one marble from the bag. If it is gold, you win \$4. If it is silver, you win \$2. If it is black, you lose \$1. What is your expected

4. physics

a cheetah can accelerate from rest to 24 m/s in 2.0 s . Assuming the acceleration is constant over the time interval, a)what is the magnitude of the acceleration of the cheetah? b) what is the distance traveled by the cheetah in these 2.0 s.? c) a runner

5. pre-calculus

find the area of the segment formed by a chord 24 cm long in a circle of radius 13 cm.

6. Expected Value

A bag contains 1 gold marbles, 10 silver marbles, and 29 black marbles. Someone offers to play this game: You randomly select one marble from the bag. If it is gold, you win \$4. If it is silver, you win \$2. If it is black, you lose \$1. What is your

7. pre-calculus

a ship passes by buoy b which is known to be 3000 yd from peninsula p. the ship is steaming east along line be and angle pbe is measured as 28 degrees. after 10 min., the ship is at s and angle pse is measured as 63 degrees. how far from the peninsula is

what did the electrician say after fixing a light bulb at the top of the empire state building?

9. Physics

Three identical balls, with masses M, 2M, and 3M are fastened to a massless rod of length L as shown. The rotational inertia about the left end of the rod is: That's the layout below. Would calculus be needed in this problem (intergration) because then Im

10. physics

When you step on the accelerator to increase the speed of your car, the force that accelerates the car is eitheir the force of your foot on the accelerator, the force of friction of the road on the tires,the force of the engine on the drive shaft, or the

11. pre-calculus

in Triangle abc, tanA=3/4, tan B=1, and a=10. find b in simplest radical form.

12. pre-calculus

suppose a triangle has two sides of lengths a and b. if the angle between these sides varies, what is the maximum possible area that the triangle can attain? what can you say about the minimum possible area?

13. chemistry

The growth of Pseudomonas bacteria is modeled as a first-order process with K=0.035 min ^-1 at 37 degrees C. The initial Pseudomonas population density is 1.0 x 10^3 cells/L. Enter your answers in scientific notations. A) What is the population density

14. English

Fire can be either friendly or a foe, depending on the situation. is this a correct paralell sentence

15. English

My sister Aliah is both a comic and smart. Parallel Sentence?....

16. pre-calculus

How do I prove that sinx/sinx+cosx=tanx/1+tanx

17. World History

How was mao's vision of communism different from that of lenin?

18. English

Neither the searing pain in my toe nor the blinding rain in my face will keep me from finishing the race. Is this a correct parallel sentence?....

19. please check over my work

A 2.5 kg stone is released from rest and falls toward earth. After 4s, the magnitude of its momentum is: My work: J=F*t =(F *t)= 24.5N * 4s F= 2.5 *9.81= 24.5 J=P P= 98kg m/s A sphere X, of mass 2kg, is moving to the right at 10m/s. Sphere Y, of mass 4 kg

20. physics

Some hydrogen gas is enclosed within a chamber being held at 200 whose volume is 0.0250 . Initially, the pressure in the gas is (14.8 ). The chamber is removed from the heat source and allowed to cool until the pressure in the gas falls to . At what

21. social studies

What doctrine of rights did both the "no incorporation" justices and the "plus incorporation" justices use to expand the notion of legal rights?

22. pre-algebra

how long will it take to earn \$568.75 in interest if \$2500 is invested at a 6.5% annual interest rate

23. science

Which of the following is an example of an environment pressure

24. experimental psychology

Given that on one section of the SAT the mean is 500 and the standard deviation is 100, what is the approximate probability of a student scoring 600 or higher on the test? Round as appropriate.

25. Biology

In humans, the allele for brown eyes is dominant to the allele for blue eyes. If a man with blue eyes and a woman with brown eyes who is homozygous for eye color have children, what is the probability of having a child with blue eyes? Here are the choices:

26. English

According to some economists, neither high unemployment nor large deficits will keep the economy from rebounding. How to make this a parallel sentence?

27. Economics

What were the drawbacks of central planning in the former Soviet Union...Plz help ASAP LUV tatiana It was political, as opposed to practical. It relied on false data, provided politically correct. It failed to allow for market forces, producing much that

28. chemistry

A 2.000g sample of magnesium was burned in air to form an oxide. After the product was purified it was found to have a mass of 3.317g. What is the empirical formula for the product? I know how to find a empirical formula, I just don't understand what

29. physics

A baseball leaves a pitcher's hand horizontally at a speed of 115 km/h. The distance to the batter is 18.3 m. (Ignore the effect of air resistance.) (a) How long does the ball take to travel the first half of that distance? (b) The second half? (c) How far

30. physics

A cart is propelled over an xy plane with acceleration components ax = 5.1 m/s2 and ay = -2.9 m/s2. Its initial velocity has components v0x = 8.2 m/s and v0y = 11.2 m/s. In unit-vector notation, what is the velocity of the cart when it reaches its greatest

31. math

what did the donut say to the filling?

32. Economics

How did the Four Modernizations make the Chinese economy more like the U.S. free enterprise system? Check this site for some information. http://en.wikipedia.org/wiki/Four_Modernizations

33. physics concepts (please check over my work)

A uniform cyclinder made of lead has the same mass and the same length as a uniform solid cylinder made of wood. The rotatonal inertia of the lead cylinder compared to the wooden one is: I thought at first that the rotational inertia cannot be known or

34. pre-calculus

suppose a triangle has two sides of lengths a and b. if the angle between these sides varies, what is the maximum possible area that the triangle can attain? what can you say about the minimum possible area? could you explain by detail

35. Energy (physics)

The wound spring of a clock would possess the same potential as kinetic energy. I am I correct in that statement. No. The wound spring has PE. Now what is this writing of KE? What is moving? how is it connected or related to the wound spring?

Total Rainfall = rainfall mm x area covered In order to ensure that our values are correct we will need to convert the area covered (the total area of the two tanks) from metres into millimetres. We will also need to convert the total rainfall (KL) into

37. physics

I had wrote that was because I was told that in the beginning of the spring being wound the PE=KE. Can I check a concept question, The amount of work required to stop a moving object would be equal to the mass of the object times it intial speed due to

38. history maps

1 5/8 inches represents about how many miles on the scale bar on the political map legend? 3.8 centimeters represents about how many kilometers?

39. Home Economics

Q: How did conflict over the First and Second Banks of the United Sates reflect Federalist and Antifederalist views of government? Federalist view http://en.wikipedia.org/wiki/Federalist_Party_(United_States)

40. English

The space shuttle was both a marvel and huge. Parallel Sentencce?....

41. Math

Demonstrate the if f and g are one-to-one functions then f°g is also one-to-one

42. math

put in order from least to greatest; 3/3, 3/5, 3/6, 3/8

43. Maths

So if I'm using the area 8558.25 in that math I need to have it as 8558.25squared and then sqaure root it?

44. Math

Okay so I'm trying to work out how many mm of rain fell in a certain area. I've got the total volume/capacity that fell (3.51125KL) and the total area that it fell in (8558.25m). My formula is Total Rainfall = rainfall mm x area covered How would I make

45. Math

Hey I'm working on a math assignment and I'm trying to work out the total amount of rainfall that fell in a certain area. Would this formula be correct? Total rainfall = rainfall mm x duration of storm minutes x area covered And with my rainfall mm I

46. Physics

The space shuttle releases a satellite into a circular orbit 440 km above the Earth. How fast must the shuttle be moving (relative to Earth) when the release occurs?

How would you make a serial dilution if you have a starting value 100mM of X The are the values of X show different dilutions. I think she wants to know starting from 100mM of X how you would get the X values through a serial dilution. X 0 1 3 1 10 30 100

48. physics

The homework question asks: which work woulf be required to stop a moving object: the intial speed, the intial kinetic energy of the object, the mass of the object times it acceleration, the mass of the object times its intials speed, or the square of the

49. Math

Show that f is a function one-to-one, if and only if f(x) = 0 for x=0. I cannot solve this demonstration, I know that if both elements are the same and their functions are the same, then is one to one, but in this case they only show me one element. Please

50. conics

given A(6,8) and B(-6,-8) write an equation in terms of x and y for all points P(x,y) such that segment PA is perpendicular to segment PB. simplify the equation and interpret your answer.

51. pre-calculus

solve cos 2x=secx for 0(

52. world history

What single event set in motion the start of WW1?

53. Algebra

How come log5 25^4 reduces to 4 log5 25 then 4 times 2 then finally eight?

How would you make a serial dilution if you have a starting value 100mM of X The are the values of X show different dilutions. Volume variables (x) mL 0 1 3 1 10 30 100 We starting out with 100mM of X which would be considered its concentration. In order

55. chemistry (work shown)

How would you make a serial dilution if you have a starting value 100mM of X The are the values of X show different dilutions. Volume variables (x) mL 0 1 3 1 10 30 100 We starting out with 100mM of X which would be considered its concentration. In order

56. Social Studies

Why were Whig Congressman angry about the war? What did they accuse Polk of? Plz help

57. physics

A train at a constant 68.0 km/h moves east for 41 min, then in a direction 65.0° east of due north for 22.0 min, and then west for 60.0 min. What are the (a) magnitude (in km/h) and (b) angle (relative to north, with east of north positive and west of

58. physics

A train at a constant 68.0 km/h moves east for 41 min, then in a direction 65.0° east of due north for 22.0 min, and then west for 60.0 min. What are the (a) magnitude (in km/h) and (b) angle (relative to north, with east of north positive and west of

59. math

given O(0,0) and N(12,0) write an equation in terms of x and y for all points P(x,y) such that segment PO is perpendicular to segment PN. simplify this equation and show that P is on a circle.

60. Physics

A cannon ball is shot from a cannon with a horizontal velocity of 200m/s. What is the time until impact on a target 50m downrange? What is the objects horizontal velocity at impact (ignoring air resistance)?

61. chemistry

I have a lot of trouble doing this chemistry exercise It says: The altitude of the lake affects the solubility of oxygen in lakes high in the alps. if the solubility of O2 from the air is 7.89 mg/L M at sea level and 25C, what is the solubility of O2 in

62. science

Why was the discovery of microspheres and coacervates an important contribution to the understanding of how life might have originated on Earth?

63. living enviroment

how do yuh break the the spermatogenesis and get the meaning for example biology bio=life ; logy = study of

65. Algebra

z^5-28z^3+27z=0 How do you use variable substitution and factoring to find all of the roots of this equation? I know how to do it if the z would have only been to the fourth power, but how do you do it with an odd numbered power like this? Thanks!!

66. math

how do you find the plot the slope and y-intercept 2y=4x-4

68. English

Which of the following sentences contains an error in subject-verb agreement? a) Either Dennis or Susan is going to pick you up. B)Each of the 14 groups are going to contribute an item to the auction. C) Krisy, Molly, and Kate attend the same university

69. Math

Express the following in term of sum (or difference)of logarithms: log (10A)/(7B^2)

70. college calculus

I don't know how to solve this indefinite integral with both limits as variables: ^x^3 ç (z^4+1)dz ⌄ln(x) If you could explain I'd appreciate it.

71. physics

A plane flies 475 km east from city A to city B in 50.0 min and then 986 km south from city B to city C in 1.00 h. For the total trip, what are the (a) magnitude (in km) and (b) direction of the plane's displacement, the (c) magnitude (in km/h) and (d)

72. conics

given O(0,0) and N(12,0) write an equation in terms of x and y for all points P(x,y) such that segment PO is perpendicular to segment PN. simplify this equation and show that P is on a circle.

73. science

Where can I get any good scientific journals which might have info on dingoes

74. math

can someone plzz tell me whichone is true. just but down the number when u answer back plzz & thank you 1. 14+(-25)> -50= 2. 20*10^3 3. 3/4 + 3/4> 1 4. 6^2=2^6 5. -21-(-39)=60 6. 19 7. 11*11*11 = 33^3 8. 38

75. World History

What started the civil war in china?

76. US History

In what ways did the progressive belief in using experts played a role in shaping roosvelts reforms?

77. Algebra

What do you do in synthetic division when there's a two digit number? For example, this is what I'm synthetically dividing 3 2 5 7 3 3 1 8 8 times three is 24, so what should I do? Thanks for your help Tatie

78. Algebra

We are learning using the log button in algebra. I have a TI-83 calculator. My book says that log10 85 (there is no space between thet 10 and the 85, that's just to show the different numbers) is equal to 1.93 approximately. But I got 85. How do you

79. social studies

how did events in the west help the Patriots' cause?

80. englise

i need help with home work and i don't know what some of the stuff means i can Help tatiana i got an A in english Please ask specific questions and include what you think the answers might be. Someone here will be happy to help you. =)

81. economics

What were the original causes of the u.s. trade deficit? Help please ASAP Check this site. (Broken Link Removed)

How would you make a serial dilution if you have 100mM of X These are the values of X that she gave. X 0 1 3 1 10 30 100 These are the values of X in the serial dilution. If you could help me out by start me off because I am kind of confused with the

1. Math

Ok so you guys good

posted on November 19, 2018
2. math

posted on July 13, 2018
3. Science

posted on June 18, 2018
4. MatH HELP

How did you get .29629

posted on November 21, 2017
5. english plz plz help

Ms.Sue , I just took the quiz. The right answers were: 1) D 2) C 3) B 4) C 5) A 6) B So stop calling people names and saying that they're lying. I just got a 100% on the quiz. Why do you even put answers here if you're just going to insult the other people

posted on September 20, 2017
6. english

d

posted on March 28, 2017
7. Math

If two trapezoids have the same area do they always have the same perimeter

posted on January 24, 2017
8. math

I just need help hoes

posted on January 19, 2017
9. Math

posted on December 1, 2016
10. Government

4) effective government cannot be run by politicians that base their public opinions on poll results.

posted on November 14, 2016
11. Expected Value

Thanks

posted on October 6, 2016
12. Expected Value? Help

For (a) I have 11.55 is this correct

posted on September 25, 2016
13. Expected Value? Help

what?

posted on September 25, 2016
14. Expected Value?

iS IT 44.616

posted on September 25, 2016
15. math

Is 16.6 a rational or irrational# ????

posted on August 21, 2016
16. math

40

posted on November 3, 2015
17. science

observing

posted on September 28, 2015
18. subtraction (math)

Your butt plus my bütt ID thesse nuts

posted on September 1, 2015