# allen

Newest questions and responses by allen
1. ## Math

Did I simplify these together correctly (2-3i)-(3+5i)? 1) I distributed the negative through 3+5i and got -3-5i 2) then I eventually after that let the 2-3i the same so I have it as: 2-3i-3-5i 3) (2-3) -(-3i-5i) 4) 2-3=-1 and -3-5=-8 5) so eventually in

2. ## science

In space, astronauts don’t have gravity to keep them in place. That makes doing even simple tasks difficult. Gene Cernan was the first astronaut who worked on a task outside a spaceship. He said of the experience, “Every time I’d push or turn a

3. ## science

In space, astronauts don’t have gravity to keep them in place. That makes doing even simple tasks difficult. Gene Cernan was the first astronaut who worked on a task outside a spaceship. He said of the experience, “Every time I’d push or turn a

4. ## physics

if a ball is thrown downward from a roof top 100meters tall and hits the ground in 3 seconds how hard is it thrown?

5. ## Chemistry

Different manufacturers claim to have the best antacid. Which of the following tablets would neutralize the most acid for the money? A. Rolaids (550 mg CaCO3 and 110 mg Mg(OH)2 per tablet) – 150 tablets for \$9.44 B. Tums (500 mg CaCO3 per tablet) – 150

6. ## physics

What is the momentum of a 60 kg sprinter running at 8.0 m/s?

7. ## APUSH

How have perspectives about health and conservation changed since the late 1800s?

8. ## physics

A toaster oven operating at 800 W of power takes 60 min to bake a potato. How much energy is this in joules? How much energy is this in kilowatt-hours?

9. ## Math

Can anyone help with this question? Your backpack contains 2010 chocolate bars, which you are going to divide between your best friend and yourself. You think you are a nice person, so you will give your best friend more than zero chocolate bars. However,

10. ## Chemistry

How many mL of 0.0257 N KIO3 would be needed to reach the end-point in the oxidation of 34.2 mL of 0.0416N hydrazine in hydrochloric acid solution

11. ## Trig

To help a young tree grow straight, a gardener attaches three guy wires to it and the ground. She places the wires two feet below the top of the tree. If the wires are ten feet long and each makes an angle of 58 degrees with the ground. Find the height of

12. ## algebra

A tower 25 meters tall casts a shadow 20.8 meters long. What is the distance from the top of the tower to the end of the shadow?

13. ## Math

Sarah had got 40 out of 50 questions right. What is the percentage of questions Sarah got right? Explain and show your work.

14. ## math help? burnet help.

How is the the graph of y=1/4x -4 obtained from the graph of y=1/x? Horizontally stretched by a factor of 4 and shifted up by 4 units. Vertically stretched by a factor of 4 and shifted down by 4 units. < my answer Horizontally compressed by a factor of 4

15. ## Math

A decorative pottery bowl with a diameter of 30 cm is used as a garden ornament . A rain shower fills it with water to a maximum depth of 7 cm. The bowl is slowly tipped to remove the water. What angle will the rim of the bowl make with the horizontal when

16. ## chemistry

A solution containing 40 g of calcium bromide requires 14.2 g of chlorine to react completely with it and 22,2 g of calcium chloride is produced in addition to ehaever bromine is obtained. How many grams of calcium bromide are required to produce 10.0

17. ## Physics

A car travelling at 90 km/hr sounds it horn as it approaches a stationary cyclist.if the car horn is at 512 Hz and temperature of air is 10 degree centigrade, what is the frequency of the sound waves reaching the cyclist as car approaches.

18. ## Physics

What is the final speed of an object and how far does it travel while accclerating if its initial speed is 10m/s and it accelerates at 8.9m/s squared for 5 s

19. ## Physics

if mars orbits the sun at an angular velocity of 1.06x10-7 rad/s, how long is a year on mars in earth days assuming it travels in a circular orbit?pls explain

20. ## united

write five sentience about my birthday

21. ## Math

Estimate. Then find the sum 540,943 + 382093

22. ## Ap European

In what respect must each of the following share in the war guilt? World war 1 Austria,Serbia,Russia,France,Britain,German

23. ## Ap European

In what respect must each of the following share in the war guilt? Austria,Serbia,Russia,France,Britain,Germany

24. ## English

In america, our government is based on the principles of society and the rights of man. do you agree or disagree? List at list 3 example.

25. ## Physic

A 75-W, 120-V bulb is connected in parallel with 25-W, 120-V bulb. What is the net resistance?

26. ## Physic

A 2.5-kohms and a 3.7-kohms resistor are connected in parallel; this combination is connected in series with a 1.4 kohms resistor. If each resistor is rated at 0.5W (maximum without overheating), what is the maximum voltage that can be applied across the

27. ## Physic

Two resistors when connected in series to a 120-V line use one-fourth the power that is used when they are connected in parallel. If one resistor is 4.8 kohms. what is the resistance of the other?

28. ## Physic

A 2.5-kohms and a 3.7-kohms resistor are connected in parallel; this combination is connected in series with a 1.4 kohms resistor. If each resistor is rated at 0.5W (maximum without overheating), what is the maximum voltage that can be applied across the

29. ## Physic

Two resistors when connected in series to a 120-V line use one-fourth the power that is used when they are connected in parallel. If one resistor is 4.8 kohms. what is the resistance of the other?

30. ## Physic

A 75-W, 120-V bulb is connected in parallel with 25-W, 120-V bulb. What is the net resistance?

31. ## math

Identify the solution(s) of the system of equations, if any. x + 2y = 7 3x - 6y = 3 (4, ) (4, ) (, 4) (, 4)

32. ## math

what the difference of 13 over 32 and 1 over 2

33. ## corporate finance

Your finance text book sold 45,500 copies in its first year. The publishing company expects the sales to grow at a rate of 20.0 percent for the next three years, and by 7.0 percent in the fourth year. Calculate the total number of copies that the publisher

34. ## physics

Calculate the speed of water (in m/s) flowing from a pipe at the bottom of an open topped barrel which has a water level 138 cm high in it.

35. ## physics

A sound registers 77.9 decibels on a detector. What is the intensity in W/m2? Assume the threshold of human hearing is 1.0×10-12 W/m2. Give your answer in picowatts/m2. 1 pW = 1×10-12 W/m2

36. ## physics

Calculate the speed of a wave in m/s along a taut string with tension 139 Newtons and a mass per unit length of 3.6 grams per metre.

37. ## college physics

"The Magnitude of the buoyant force is equal to the weight of fluid displaced” is a statement of which principle in the study of fluids? Select one: a. Pascal's Principle b. Archimedes' Principle c. Bernouilli’s Principle d. The Equation of Continuity

38. ## physics

An object of mass 1.6 kg is dropped from a height of 2.9 metres. It lands with a speed of 2.8 m/s. How much energy was lost due to air resistance? (Give your answer to 2 s.f., expressed as a magnitude)

39. ## physics

Calculate the magnitude of the force if a ball of mass 249.9 grams, and initial velocity +16.5 m/s is struck back on the same path with a final velocity of -22.0 m/s. Assume the contact time is 3.1 milliseconds. Use 2 s.f.

40. ## physics

An astronaut, mass 128.2 kg including spacesuit, pushes off from the International Space Station (mass 110 tons) with a speed of 1.2 m/s. What is the speed of the Space station in the opposite direction? Use 2 s f. for your answer

41. ## Physics

A system gains 473J of kinetic energy while losing 271J of potential energy. The thermal energy increases by 127J . Use an energy bar chart of this process to find the external work Wext.

42. ## Physics

A block of mass 12.0 kg is initially sitting at rest on a 30.0o incline. There is a spring mounted to the ramp with spring constant k = 13500 N/m. The block is released to slide down the incline and comes to a stop momentarily after the spring has been

43. ## Chem

Calculate the standard cell potential given the following standard reduction potentials: Al3++3e−→Al;E∘=−1.66 V Fe2++2e−→Fe;E∘=−0.440 V

44. ## Language Arts (english)

1.In general terms, how do the townspeople in “The Handsomest Drowned Man in the World” react to the body which washes up on their shore? 2.Why do the townspeople react to Esteban as they do? What is he to them? 3.What is a fable, how might “The

45. ## Algebra

How do I solve: One leg of a right triangle is 4 m longer than the other. If the length of the hypotenuse is 18 m, how long are the other two legs?

46. ## Math

Find the z-score such that the area under the standard normal curve to the left is 0.25

47. ## math

Find the value of z = 0.94

48. ## Solid mensuration

The bases of a triangular right prism are apart. find the volume and the total surface area of the prism if one side of the quilateral triangular base measures 6cm

49. ## Physics

In a photoelectric-effect experiment it is observed that no current flows unless the wavelength is less than 570nm . A)What is the work function of this material? W0= in eV B) What is the stopping voltage required if light of wavelength 420nm is used?

50. ## physics

A gamma-ray photon produces an electron-positron pair, each with a kinetic energy of 275keV . What was the energy of the photon? E=in MeV What was the wavelength of the photon? wavelength in m Please help thank you!

51. ## Physics

In a photoelectric-effect experiment it is observed that no current flows unless the wavelength is less than 570nm . A)What is the work function of this material? W0= in eV B) What is the stopping voltage required if light of wavelength 420nm is used?

52. ## phics

In an experiment on motion, a cart weighing 240 N was pulled up an inclined plane. Which of the following would be the expected reading on the spring scale as the cart is pulled up an inclined plane set upon two books

53. ## math

Your question: "The shorter diagonal of a rhombus is 50 mm long. Each of its obtuse angles measures 140. Find the length of each side."

54. ## cmsd

Your question: "The shorter diagonal of a rhombus is 50 mm long. Each of its obtuse angles measures 140. Find the length of each side."

55. ## Math

Mark bought 54 cm of lace and 2m 45cm of black lace. How much total lace in meters did he buy?

56. ## posibility

One problem encountered by developers of the space shuttle program is air pollution in the area surronding the launch site. Acertain direction from the launch site is considered critical in terms of hydrogen chloride pollution from the exhaust cloud. It

57. ## Finance

The following information was available as of the close of business June 1, 2004 on government of Canada bonds. Coupon...Maturity.....Price.....Yield 5.00%......June 1, 2005......102.35......2.60 10.50%......June 1, 2006......113.91......3.26

58. ## Math 102

What number must be added to the numerator and subtracted from the denominator of 10/23 to obtain a fraction equivalent of 6/5? Please provide step by step, this is a word problem for rational expressions. Thank you

true or false Arbitration and grievance procedures have done virtually nothing to prevent chaos and disorder in labor relations.

60. ## finite math

Given n(A')=23, n(B')=16, and n((A [intersect] B) U (AUB)'))= 24, find (A [intersect] B) I apologize but intersect was the best way I found to represent the upside down U symbol.

how sympathetic are you to the statement of a former general motors chairman that offering a union leader a seat on GMs board of directors made "as much sense as having a member of GM's management sitting on the board of an international union?" Explain. I

62. ## finite math

suppose that 3 digits are selected at random from the set S={1,2,3,4,5,6} and are arranged in random order. Find the probability that the resulting 3-digit number is less than 300.

governmental wage and price controls should never be tried again. they have been failures. agree? why or why not?

do you believe that public employees should be able to employ collective bargaining for wage increases or should the ‘free market’ continue to dictate wages in the public sector? Why or why not?

Labor’s membership stagnation in the last half-century can be explained by several formidable obstacles. Explain

66. ## Physics

For a record playing at 45 rpm, find the frequency and the angular velocity. Frequency= Angular velocity=

67. ## chemistry

How many grams of carbon can be burned in 15 dm3 of oxygen and many dm3 of CO2 is produced?

68. ## chemistry

how many grams of magnesium are required to liberate 250 cm3 of Hydrogen gas from HCL

69. ## alebra

how do i simplify 3m+n/4n^2m + 3m +n +5/4n^2m

70. ## algebra

how do i simpllify 5/x + 4/x^2 - 3/x^3

71. ## physics

if one man 50 kgs fell from 10 meter high builder, how much impact force when he hit the concrete ground and how long the time it happen.

72. ## College Physics

Find the minimum work required to carry a truckload of furniture weighing 1.99 104 N to a third-story apartment, 24.0 m above the truck.

73. ## College Physics

A 4.30 kg block starts from rest and slides down a frictionless incline, dropping a vertical distance of 2.60 m, before compressing a spring of force constant 2.20 104 N/m. Find the maximum compression of the spring.

74. ## College Physics

A 4.30 kg block starts from rest and slides down a frictionless incline, dropping a vertical distance of 2.60 m, before compressing a spring of force constant 2.20 104 N/m. Find the maximum compression of the spring.

75. ## College Physics

A 4.30 kg block starts from rest and slides down a frictionless incline, dropping a vertical distance of 2.60 m, before compressing a spring of force constant 2.20 104 N/m. Find the maximum compression of the spring.

76. ## College Physics

A 4.30 kg block starts from rest and slides down a frictionless incline, dropping a vertical distance of 2.60 m, before compressing a spring of force constant 2.20 104 N/m. Find the maximum compression of the spring.

77. ## College Physics

A 4.30 kg block starts from rest and slides down a frictionless incline, dropping a vertical distance of 2.60 m, before compressing a spring of force constant 2.20 104 N/m. Find the maximum compression of the spring.

78. ## mystery trip

can you help me unscramble this famous couple names enargraaetnmgremaad

79. ## Physics

During a baseball game, a batter hits a pop-up to a fielder 83 m away. The acceleration of gravity is 9.8 m/s^2. If the ball remains in the air for 6.5 s, how high does it rise? Answer in units of m

80. ## english 30-1

write a short compostion discussing social satire in happy event. what aspects of society is satized? how are devices like irony and hyperbole is used to achieve satire? what changes does the author suggest?

81. ## Physics

A baseball is tossed at a steep angle into the air and makes a smooth parabolic path. Its time in the air is t and it reaches a maximum height h. Assume that air resistance is negligible. a. Show that the height reached by the ball is gt^2/8. b. If the

82. ## Physics

A rock thrown from a bridge hits the water below at a horizontal distance x directly below the throwing point. The rock travels a smooth parabolic path in time t. a. Show that the virtical distance of the bridge above water is 1/2gt^2. b. What is the

83. ## mathematics

2a^2-3a-2/4a^2-1 (4a^2-1 = denominator) divided by a^2-4/2a^2-5a+2

84. ## physics

If you do 100 j work in 50 seconds, then your Power output is

85. ## statistics

In a binomial distribution: A) the random variable X is continuous. B)the probability of event of interest (pie symbol)is stable from trail to trial C) the number of trials n must be at least 30 D) the results of one trial are dependent on the results of

Out of 42 kids in a class twice as many failed Ela as math,4 failed both. If 7 failed neither, find how many failed each subject. Show work thanks

87. ## Health(quick question)

why do you need Fiber in foods and is it used to build up muscles

88. ## ELA (QUICK QUESTION)

i need some postive and negative aspects of schools. i need help starting my intro can you help me thanks

89. ## Math

Here's a frequency distribution table for the speeds of a sample of automobiles. Speed(MPH) Frequency Midpoint(I found) 50-54 2 52 55-59 4 57 60-64 5 62 65-69 10 67 70-74 9 72 75-79 5 77 I am trying to find the variance but whatever I do I can't seem to

90. ## please explain poster thx

i found this propaganda poster can you explain it on the poster it says When you ride Alone you ride with Hitler. The next poster i found was Be ready join now CAn you explain these two posters thanks

91. ## Ela(summary)

Can you give my a nice summary for milk weed? i really don't get the book i read it

92. ## History

Why did Arthur Ashe created the National Junior Tennis?

93. ## SCIENCE(easy)

explain what might happen to a boulder(large/rock) that is left in your school yard for a long time.

94. ## TECH(recycle)

I'm making a recycle logo i need some good ideas to put in the logo and can u give me examples of good recycling logos

95. ## logos

i need some amazing logos can u help

96. ## free verse poems please

i need really good examples of free verse poems please

97. ## POEMS tanka poem

examples of tanka poems thanks

98. ## poems

I NEED EXAMPLES OF HAIKU POEMS

99. ## math

Condensing 1/2logs+logm+logh-2logI-logd-logk logt+logh+logx-2logl-log0-logl