Questions Asked onApril 16, 2012

1. Chemistry

If the literature value for the ΔHfus of water is 6.01 kJ/mol, how many kJ of heat energy would be required to completely melt 130 g of ice at 0°C?

2. psychology

humanistic therapy acknowledge unconscious forces and --- as a source of personal difficulties environment negative thoughts genetics psychosis please help

3. Chemistry

Assume equal concentrations, rank these solutions by pH HBrO, Ca(OH)2, HCl, KOH, NH3 Here's how I ranked it: highest: Ca(OH)2 > HCl > KOH > NH3 > HBrO lowest is this correct? if not please tell me why!

4. psuchology

Currently there are --- types of cognitive therapy in common practice. 2 4 6 cognitive therapy is rarely used today please help

5. chemistry

a 500ml sample of o2 gas at 24 degrees celsius was prepared by decomposing a 3% aqueous solution of hydrogen peroxide, in this presence of a small amount of manganese catalyst by the reaction 2H2O2>2H2O+O2. The oxygen thus prepared was collected by

6. Chemistry

Calculate the amount of heat released in the complete combustion of 8.17 grams of Al to from Al2O3 at 25 celcius and 1 atm. The delta enthalphy change in the heat of formation for Al2O3 = 1676 KJ/mol 4Al(s) + 3O2(g) --> 2Al2O3(s)

7. physics

Skater 1 has a mass of 45 kg and is at rest. Skater 2 has a mass of 50 kg and is moving slowly at a constant velocity of 3.2 m/s [E]. Skater 3 has a mass of 75 kg and is moving quickly at a constant velocity of 9.6 m/s [E]. Which skater experiences the

8. physics

If a 80 lightbulb emits 4.0 of the input energy as visible light (average wavelength 550 ) uniformly in all directions, estimate how many photons per second of visible light will strike the pupil (4.0 diameter) of the eye of an observer 3.0 away. 1. I

9. RMS Speed

A gas is at 20°C. To what temperature must it be raised to triple the rms speed of its molecules? Ans: 2364oC I don't get how they got the answer. Please help!

10. College Chemistry

A sample of an iron alloy contains 92.1g Fe, 2.59g C, and 1.59g Cr. Calculate the percent by mass of each component present in the alloy sample.

11. Chemistry

At 25 degrees Celsius all of these are true for a neutral solution : pH = 7.00, pOH = 7.00, and [H+] = [OH-] is that correct? For a neutral, aqueous solution regardless of temperature.. would the only correct statement be [H+] = [OH-]? pH = 7.00 and pOH =

12. engineering science

The spherical side mirror on a car is convex and has a radius of curvature of 25 cm. Another car is following, 20 m behind the mirror. If the height of the car is 1.6 m, how tall is its image?

13. Chemistry

For the chemical reaction CH3Br + OH- CH3OH + Br-, which of the following would speed up the reaction? increasing the CH3Br concentration reducing the OH concentration cooling the reactant mixture Please help with this question. I appreciate it. Thank you.

14. Chemistry

How would you find the pH of a solution prepared by mixing 50 mL of 0.125 M KOH with o.050 L of 0.125 M HCl?

15. college chemistry

Followed by the total volume. Calculate the molarity of this solution: 0.521 mol NaCl;125 mL

16. physics

calculate the net charge on a substance consisting of a combination of 3.0X10^13 protons and 8.6X10^13 electrons.

17. Math

Estimate the number of pints In 445 ounces?

18. chemistry

need formula to this. Carbon monoxide reacts with oxygen to produce carbon dioxide. If 3.0 Liters of carbon monoxide at STP, how many liters of oxygen are required to run the reaction

19. Organic Chem

Outline a separation scheme for isolating pure isopentyl acetate from the reaction mixture.

20. chemistry

What volume of nitrogen at 215 degress celcius and 715 mmHg would be required to react with .100 moles of hydrogen to produce ammonia? N2+3H2--> 2NH3

21. Chemistry

A 125-g piece of metal is heated to 288 degrees celsius and dropped into 85.0 g of water at 26 degrees celsius. If the final temperature of water and metal is 58 degrees celsius, what is the specific heat of the metal?

22. chemistry

A liquid was analyzed to be 54.5% C, 9.10% H, and 36.4% O. An empty flask, whose mass was 45.32 g, when filled with the vapor of the liquid at 735mm Hg and 99.2°C had a mass of 46.05 g. The volume of the flask was found to be 263.2 mL. empirical formula

23. physics

Two fi gure skaters are moving east together during a performance. Skater 1 (78 kg) is behind skater 2 (56 kg) when skater 2 pushes on skater 1 with a force of 64 N [W]. Assume that no friction acts on either skater. T / I (a) Determine the acceleration of

24. pre cal

What is the center of the conic whose equation is x^2 + 2y^2 - 6x + 8y = 0 2.Which one of the following equations represents a hyperbola? (5 points) A) 3x^2 + y^2 + 12x - 7 = 0 B) 3x^2 + 3y^2 + 12x - 7 = 0 C) 3x^2 + y + 12x - 7 = 0 D) 3x^2 - 3y^2 + 12x - 7

25. physics- help please !!1

A toy rocket moving vertically upward passes by a 2.2m -high window whose sill is 7.0m above the ground. The rocket takes 0.17s to travel the 2.2m height of the window part a) what was the launch speed of the rocker ? assume the propellant is burned very

26. Math

Nico was stunned when he opened the mail. Here was a check for \$322.50! This was the interest he earned on his investment. One year ago Nico had been given \$5,000. His parents made him put it in the bank and save it for college, but they said he could keep

27. physics

Humans can hear sounds with frequencies up to about 20.0 kHz, but dogs can hear frequencies up to about 40.0 kHz. Dog whistles are made to emit sounds that dogs can hear but humans cannot. If the part of a dog whistle that actually produces the high

28. AP Chemistry

A voltaic cell is constructed that uses the following half-cell reactions. Cu+(aq) + e- Cu(s) I2(s) + 2 e- 2 I -(aq) The cell is operated at 298 K with [Cu+ ] = 2.3 M and [I - ] = 3.3 M. (a) Determine E for the cell at these concentrations. (b) If [Cu+ ]

29. physics

in a bizzare but harmless accident, superman fell from the top of the eiffel tower. how fast was superman traveling when he hit the ground 7.80 seconds after falling

30. college algebra

a cub measures n inches on each edge. If a slice 1 inch thick is cut from one face of the cube and then a slice 3 inches thick is cut from another face of the cube, the resulting solid has a volume of 1560 cubic inches. Find the dimensions of the original

31. Physics help!!

A Styrofoam bucket of negligible mass contains 1.60 kg of water and 0.425 kg of ice. More ice, from a refrigerator at -14.8 degree C, is added to the mixture in the bucket, and when thermal equilibrium has been reached, the total mass of ice in the bucket

32. Trig

How do you find the exact circular function value of csc(-23pi/6)? I don't know how to do the pi symbol on the keyboard.

33. college algebra

A propane tank has the shape of a circular cylinder with a hemisphere at each end. The cylinder is 6 feet long and volume of the tank is 5pie cubic feet. Find, to the nearest thousandth of a foot the length of the radius x.

34. chemistry

Given that the specific heat capacities of ice and steam are 2.06 J/g degrees celsius and 2.03 J/g degrees celsius, respectively, and considering the information about water given, calculate the total quantity of heat evolved when 10.0g of steam at

35. income tax

Jonathan is married, files a joint return, and has one child. During 2011, Jonathan has \$85,000 of taxable income. He has \$20,000 of positive AMT adjustments and \$28,000 of tax preferences. Since Jonathan rents his home (pays no mortgage interest) and

36. area hexagon

Find the area of a regular hexagon with an apothem 10.4 yards long and a side 12 yards long. Please help

37. Chemistry

Given that the specific heat capacities of ice and steam are 2.06 J/g degrees celsius, respectively, and considering the information about water given in exercise 16, calculate the total quantity of heat evolved when 10.0g of steam at 200. degrees celsius

38. chemistry

what mass of ethanol(C2H5OH) will be required to prepare a 2.00m solution in 8.00kg of water?

39. Physics

The human ear can detect sounds with frequencies between 20 Hz and 20kHz. Find the largest and smallest wavelengths the ear can detect, assuming that the sound travels through air with a speed of 343 m/s at 20°C. smallest ___m largest____m

40. Physics 100

A 355-g piece of metal at 48.0 degree celsius is dropped into 111g of water at 15.0 degree celsius.If the final temperature of the mixture is 32.5 degree celsius what is the specific heat of the metal?

41. AP Chemistry

A voltaic cell is constructed that uses the following half-cell reactions. Cu+(aq) + e- Cu(s) I2(s) + 2 e- 2 I -(aq) The cell is operated at 298 K with [Cu+ ] = 2.3 M and [I - ] = 3.3 M. (a) Determine E for the cell at these concentrations. (b) If [Cu+ ]

42. Chemistry

What volume of carbon monoxide gas (at STP) is needed when 1.35 Moles of oxygen gas react completely in the following equation. 2CO + O2 > 2CO2 please show your work I'm having trouble with Gas Stoichiometry.

43. Chemistry

Complete and balance the following equation: NO2{-} + Cr2O7{2-} = Cr{3+} + NO3{-}

44. Geometry

In the standard (x,y) coordinate plane, if the x-coordinate of each point on a line is 4 less than twice its y-coordinate, what is the slope of the line?

45. maths

a box containing pens,nickels,and dimes has 13 coins with a total value of 83 cents.how many coins of each type are in the box?

46. Pharmacology

the ration 3:100 would properly be expressed in fraction form as

47. Math

A math teacher is randomly distributing 15 rulers with centimeter labels and 10 rulers without centimeter labels. What is the probability that the first ruler she hands out will have centimeter labels and the second ruler will not have labels.

48. finance

Winnebagel Corp. currently sells 29,400 motor homes per year at \$44,100 each, and 11,760 luxury motor coaches per year at \$83,300 each. The company wants to introduce a new portable camper to fill out its product line; it hopes to sell 20,580 of these

49. CHEMISTRY

Suppose 1400 J of heat energy are put into a sample of liquid water at 23°C, and the final temperature of the water is 78°C. How many grams of water are present?

50. Chemistry

Consider the voltaic cell illustrated in the figure, which is based on the cell reaction: Zn(s)+Cu^2+(aq) -> Zn^2+(aq)+Cu(s) Under standard conditions, what is the maximum electrical work, in joules, that the cell can accomplish if 52.0g of copper is

51. Trigonometry

A standard doorway measures 6 feet 8 inches by 3 feet. What is the largest dimension that will fit through the doorway without bending?

52. math

Sonya spent 3/8 of her money and then had \$15.00 left. How much money did Sonya originally have?

53. Chemistry

A 1.00-L solution saturated at 25°C with calcium oxalate (CaC2O4) contains 0.0061 g of CaC2O4. The solubility constant (Ksp) for this salt is [CaC2O4=128.09 g/mol]

54. Algebra 2

Abelardo wants to create several different 7-character screen names. He wants to use arrangements of the first 3 letters of his first name(abe, followed by arrangements of 4 digits in 1984, the year of his birth. How many different screen names can he

55. chemistry

why would it be undesirable to wash the crude halide with aqueous sodium hydroxide

56. Chemistry

Complete and balance the following equation: NO2{-} + Cr2O7{2-} = Cr{3+} + NO3{-}

57. Chemistry

Consider the voltaic cell illustrated in the figure, which is based on the cell reaction: Zn(s)+Cu^2+(aq) -> Zn^2+(aq)+Cu(s) Under standard conditions, what is the maximum electrical work, in joules, that the cell can accomplish if 52.0g of copper is

58. physics

A toy car (200 g) moves by shooting a plastic ball (50 g) horizontally out the back. The average acceleration of the car is 1.2 m/s 2 [E] and there is negligible friction acting on each part of the toy. T / I C (a) Draw an FBD for each object. (b) Identify

59. physics

at what velocity must a conductor 75mm long cut a magnetic field of flux density 0.6T if an emf of 9V is to be induced in it? Assuming the conductor, the field and the direction of motion are mutually perpendicular.

asked by frank fred
60. MATH

I have been trying to do this problem for a couple of days but i cant seem to get the answer. Any help would be greatly appreciated. For each of the following forms determine whether the following limit type is indeterminate, always has a fixed finite

61. physics

AM radio signals are electromagnetic waves transmitted between frequencies of 550 kHz and 1600 kHz. Find the range of wavelengths for these signals. largest ___m smallest___m

62. physics

a 200g tennis ball approaches a racket at 20m/s is in contact with the racket for 0.008s and the ball rebounds at 4m/s. find the average force that the racket exerted on the ball

63. Algebra

You go to the video store to rent 5 movies for the weekend. Movies rent for \$2 and \$3. You spend \$13. How many \$2 movies did you rent? ~Mish

64. chemistry

What volume of nitrogen at 215 degress celcius and 715 mmHg would be required to react with .100 moles of hydrogen to produce ammonia? N2+3H2--> 2NH3

65. math

you are making a scale drawing with a scale of 2in.=17ft. elplain how you find the length of the drawing of an object that has an actual lenght of 51ft

66. physics

Ice of mass 11.0 kg at 0.00° C is placed in an ice chest. The ice chest has 3.00 cm thick walls of thermal conductivity 1.00 10-5 kcal/s · m · C° and a surface area of 1.25 m2. (a) How much heat must be absorbed by the ice before it melts? (b) If the

67. physics

Comic-book superheroes are sometimes able to punch holes through steel walls. (a) If the ultimate shear strength of steel is taken to be 2.90 109 Pa, what force is required to punch through a steel plate 2.10 cm thick? Assume the superhero's fist has

68. history

How did George Kennan’s containment doctrine change during the Truman, Eisenhower and Kennedy administrations? Which president was the most successful in containing Communism? HELP!!!

69. world history

What was the cause of the peloponnesian War ? A.Greeks sought revenge for the Persian Wars. B.Sparta wanted control of the powerful Ahenian army. C.A spartan murdered the Athenian ruler Pericles. D.Many Greeks outside of Athens resented Athenian domination

70. chemistry

The dH for the reaction below is -482 kJ. Calculate the heat (kJ) released to the surroundings when 12.0 g of CO (g) reacts completely. 2CO(g) + O2(g) --> 2CO2(g)

71. Chemistry

1.Write a mathematical equation that can be used to calculate the concentration of the HCl solution after the standardization procedure (Titration #1). 2. Using LeChatelier’s principle, predict whether [OH-] in the calcium hydroxide/0.050 M NaOH solution

72. physics

To recharge a 12 V battery, a battery charger must move 2.7 × 105 C of charge from the negative terminal to the positive terminal. How much work is done by the battery charger? Answer in units of J

73. Calculus

A electric circuit board has equally spaced parallel wires with connections at points A, B, C. If the length of AB=3.42 cm, what is the length of BC?

74. physics

A ship mapping the depth of the ocean emits a sound of 37 kHz. The sound travels to the ocean floor and returns 0.65 s later. (a) How deep is the water at that location? m (b) What is the wavelength of the wave in water? cm (c) What is the wavelength of

75. Chemistry

Balance the equation. Cu + HNO3 --> Cu(NO3)2 + NO2 + H2O I'm having a little trouble getting this equation to balance. Thank you in advance! :)

76. physics

A copper plate has a hole cut in its center. When the plate is heated, the hole gets smaller. When heat is added to a system, the temperature must rise. When the pendulum of a grandfather clock is heated, the clock runs more slowly. Cold objects do not

77. math

if you threw a 6-sided die 48 times, about how many times would you expect it to land on a number greater than or equal to 4.

78. Biology

GENETICS PRACTICE PROBLEMS Worth 10 points each problem is either right or wrong 1. In humans, assume that brown eyes (B) are dominant over blue eyes (b). A blue eyed man, both of whose parents were brown eyed, marries a brown eyed woman whose father was

79. calculus

A 160-lb man carries a 25-lb can of paint up a helical staircase that encircles a silo witha radius of 20 ft. If the silo is 90 ft high and the man makes exactly three complete revolutions, how much work is done by the man against gravity in climbing to

80. CHEMISTRY

A student calibrates his/her calorimeter. S/he performs part 1 as instructed. The data are: 99.2 g water at 36.0°C are added to 97.3 g water in the calorimeter at 16.0°C. The final temperature is 26.0°C. Calculate the heat capacity of the calorimeter in

81. math

What mystery number has 8 digits; none of the digits are the same. It is evenly divisible by 10. The value of one of the digits is 80,000. The digits in the millions place is the largest 1-digit odd number. The digit in the thousands place is 3 less than

82. physics

the energy received by the earth from the sun is 1400w/m2. Assuming that the sun is a black body radiator and the ratio of the radius of the earth's orbit to the sun's radius is 216. Calculate the surface temperature of the sun. Stefan constant =

asked by frank fred
83. Social Civics

Does anyone know how to prepare for the final exam for Social Civics for American Schools?

84. physics

A metal container, which has a mass of 9.4 kg contains 14.2 kg of water. A 1.7-kg piece of the same metal, initially at a temperature of 160.0°C, is dropped into the water. The container and the water initially have a temperature of 15.0°C and the final

85. algebra

if the red river is 500 miles longer than the blue river. if the sum of their lengths is 5550 miles what is the length of each river

86. English

Can you please check these instructions, Writeacher. Thank you very much. English remedial test 1) Complete the following sentences with must/mustn’t, have to, don’t have to, should/shouldn’t 2) Fill in the correct future form (will future, going to

87. chemistry

The dH for the reaction below is -482 kJ. Calculate the heat (kJ) released to the surroundings when 12.0 g of CO (g) reacts completely. 2CO(g) + O2(g) --> 2CO2(g)

88. College Algebra

The number of Mosquitoes M9x), in millions, in a certain area depends on the June rainfall x, in inches:M(x)=19x-x^2. What rainfall produces the maximum number of mosquitos?

89. Discrete Math

1.Using the principle of inclusion-exclusion find the numbers of integers between 1 and 1000 (inclusive)that are divisible by at least one of 2,3,5,or 7? 2.A drug store sells gum, candy, and playing cards. 15 teenagers are in the store...the clerk notes

90. Consumer Math

Franklin deposited \$1,400 in a savings account that accrues simple interest at 6.75%. What is the balance in his account at the beginning of the third quarter?

91. Math 7 - Homework Question Check (Q2)

37. On the lines below, explain why the graph you choose is misleading? Answer - The reason why graph A was misleading is because on the left side (where the numbers are) it started from 0 to 50, then 50 to 100, AND 100 to 300! From 100 to 300 is too much,

92. Math 7 - Homework Question Check

12. Is the figure below a right triangle? On the lines below, explain how you determined your answer. Answer - The figure below is not a right triangle. The reason why it's not a right triangle is because this figure is a acute angle. Acute angle is less

93. economics

Suppose that for the firm below, the goods market is perfectly competitive. The market price of the product the firm produces is \$4 at each quantity supplied by the firm. What is the amount of labor that this profit-maximizing firm will hire, and what wage

94. Physics (Energy and Momentum)

A body of 5.10 kg mass makes an elastic collision with another body at rest and continues to move in the original direction, but with one-fourth of its original speed. What is the mass (in kilograms) of the struck body? Assuming a perfectly elastic

95. ALGEBRA

Select all statements that are true. (log_b\(A\))/(log_b\(B\))=log_b\(A-B\) (If ) log_1.5\(8\)=x, text( then ) x**(1.5) =8. log\(500\) text( is the exponent on ) 10 text( that gives ) 500. text (In )log_b\(N\), text( the exponent is )N. text( If )

96. Physics

How much heat is required to raise by 10.30°C the temperature of 1.2 kg of water? How much heat is required to raise by 10.30°C the temperature of 1.2 kg of iron?

97. discrete math

Find the solution to the following lhcc recurrence: an=3nan-1 for n >or equal to with initial conditions a0=4

98. English

i hve to do metaphor assignment where i tell which type of writer i be. i not know what metaphor to use some example be spider: I am a writer: I am a spider, spinning a web of meaning with words and images pulled from my soul. I display my beautiful and

99. math

A building has 4 stories that are each 15 feet high. A scale drawing has the height of the building at 5 inches. Which of the following is the correct scale?

100. Native American Studies: Contemporary Perspective

Define secularism and describe the role of secularism in Native and non-Native interactions. How does secularism influence Native and non-Native paradigms regarding natural resources? How has this difference influenced Native and non-Native interactions?

101. physics

An athlete swings a 4.30 kg ball horizontally on the end of a rope. The ball moves in a circle of radius 0.790 m at an angular speed of 0.590 rev/s. (a) What is the tangential speed of the ball? m/s (b) What is its centripetal acceleration? m/s2 (c) If the

102. history

How did George Kennan’s containment doctrine change during the Truman, Eisenhower and Kennedy administrations? Which president was the most successful in containing Communism

103. Consumer Math

Edith earns an annual gross salary of \$17,500. She has 28% of her gross salary withheld for taxes and other deductions. What is the net pay of each paycheck if she is paid weekly?

104. Physics

FM radio signals are electromagnetic waves transmitted between frequencies of 88 MHz and 107 MHz. Find the range of wavelengths for these signals. largest

105. Math

A bag contains 5red balls and 4 white balls. Two balls are drawn at random from the bag. The first ball drawn is put back into the bag before the second ball is drawn. What is the probability that the two balls drawn are both red?

106. dameno

The driver of a 1300-kg car moving at 21 m/s brakes quickly to 13 m/s when he spots a local garage sale. (a) Find the change in the car's kinetic energy.

107. Native American Studies

Which of the practices listed is an example of an activity Native American people might regard as an act of desecration?

108. physics

The red laser light used in supermarket scanners has a wavelength of 633 x 10-9 m. (This is 633 nanometers, 633 nm). Find the frequency of the red laser light.

109. geometry

If m = 6.25 cm and n = 10 cm, what is the measure of angle ?

110. math

if you threw a 6-sided die 48 times, about how many times would you expect to land on a number greater than or equal to 4? how do i find the answer?explain.

111. physics

A plank 2.00 cm thick and 16.3 cm wide is firmly attached to the railing of a ship by clamps so that the rest of the board extends 2.00 m horizontally over the sea below. A man of mass 87.6 kg is forced to stand on the very end. If the end of the board

112. maths

During a trip, Sally spent 1/4 of her money on some clothes. She also spent 1/3 of the remaining money on a bag. She then bought a camera which cost \$15 more than the bag and had \$95 left. How much money did Sally have at first?

113. College Math

An artifact was found and tested for its carbon-14 content. If 88% of the original carbon-14 was still present, what is its probable age (to the nearest 100 years)? Use that carbon-14 has a half-life of 5,730 years.

114. Physics

A car of mass 1.25 103 kg is initially moving on a level road at a speed of 17.0 m/s. Compute the increase in temperature of the brakes, assuming that all the mechanical energy ends up as internal energy in the brake system. Assume a total heat capacity of

115. PHYSICS

FIND THE LENGTH (IN CM) OF A PENDULUM WITH A PERIOD OF 1.20S.

116. Physics help!!

A Styrofoam bucket of negligible mass contains 1.60 kg of water and 0.425 kg of ice. More ice, from a refrigerator at -14.8 degree C, is added to the mixture in the bucket, and when thermal equilibrium has been reached, the total mass of ice in the bucket

117. Chemistry

How much volume (in mL) of 0.75 M K2SO4 (aq) and water must be mixed to prepare to 150.0 mL of 0.10 M K2SO4 solution? Thanks!

118. Consumer Math

Sylvia receives a net pay of \$390.45 biweekly. She has \$130 withheld from her paycheck. What is her annual gross salary?

119. Math

Find the coefficient of x^2y^3 in the binomial expansion of (x-2y)^5.

120. Physics

FM radio signals are electromagnetic waves transmitted between frequencies of 88 MHz and 107 MHz. Find the range of wavelengths for these signals. largest

121. statistics

the universal baking ic purhases bags of flour which vary somewhat in weight. the bakery wants to determine if the mean weights per bag purchased from two suppliers are different, a) perform a hypothesis test at a 10 percent level if the supllier 1 sample

122. Math

Juan has two number cubes, each with faces 1,2,3,4,5,6. What is the probability he can roll the cubes so that the sum of the faces showing equals 11?

123. Physics

a 65 kg sled starting from the rest slides down a 14 m high frictionless ramp. at the bottom of the ramp the sled encounters a level area that is not frictionless. how much work is done by friction to stop the sled?

124. CHEMISTRY

WHAT IS THE COST PER KJ TO PRODUCE METHANOL, ETHANOL, PARIFFIN, PROPANOL,AND BUTANOL?

125. Composition 155

explain how purpose, audience, tone, and content impact academic writing. Be sure to use the three components of a good paragraph covered in this week’s readings. In addition, be sure to answer the following questions: What is the purpose of this topic?

126. Chemistry

Calculate the volume of 1.78M sulfuric acid that would be needed to neutralize 62.4 mL of a 2.09 M aqueous ammonia solution. The equation for the reaction is H2SO4(aq) + 2 NH3(aq) ---> 2 NH4(aq)+ SO4 ^-2 (aq)

127. College Math

The "learning curve" describes the rate at which a person learns certain tasks. If a person sets a goal of typing N words per minute (wpm), the length of time t (in days) to achieve this goal is given by the following formula. t=62.5ln(1-N/80) (a)

128. physics

projectile motion with constant horizontal speed ? A stone falls off a cliff with horizontal velocity v m/s. it falls a distance of 5cm vertically and 200m horizontally in t seconds. when it has fallen a vertical distance of 20cm, what is its horizontal

129. Algebra

If the sides of a square are increased by 3 cm, its area becomes 100 cm2. Find the length of the sides of the original square.

130. science

How many moles are in a 12.0 g sample of iron (II) oxide

131. history

what event caused the greek city- states to put aside their differences.

132. physics

Two waves traveling on a string in the same direction both have a frequency of 100 Hz, a wavelength of 2cm and an amplitude of .02 m. What is the amplitude of the resultant wave if the original waves differ in phase (a) by Pi/6 and (b) by Pi/3

133. chemistry 2

An experiment calls for 125 mL of 0.105 M NaCl solution. What mass of NaCl is required? What mass of NaCl would be required for 1.00 L of the same solution?

134. poetry

I am trying to identify examples of metaphors and assonance in the poem June by William Cullen Bryant? Can you help?

135. chemistry

Given a saturated solution of 25 drops of Ca(OH)2 in water that requires 34 drops of 0.0050 M HCl to titrate to the endpoint, calculate [OH-] and [Ca2+]. An ICE table will help you relate [OH-] to [Ca2+].

136. ALGEBRA

Consider the following expression. 3(x - 2) - 9(x**2 + 7 x + 4) - 5(x + 8) (a) Simplify the expression.

137. historical globalization \$ imperialism grade 10

what does eurocentric attitude means?

138. Chemistry

What is the equationfor this?: Sulfur reacts with oxygen to produce sufur trioxide

139. social 10

What major way did the new imperialism of the late 1800s to early 1900s differ from the imperialism of the previous few ceenturies? PLEASE HELP ME!

140. Pre-Calc Help!!!

Simplify the expression by using a Double-Angle Formula or a Half-Angle Formula. Sqrt(1-cos50/2)

141. US History

The major difference in ethnicity, religion, and settlement patterns of California: A. was founded by Spain, was Catholic, and settled very early in the 18th century B. they were completely successful in Christianizing the indians C. the area was dominated

142. math

you are making a scale drawing with a scale of 2 in =17ft. explain how you find the lenght of the drawing of an object that has an actual lenght of 51ft. what points should you include in your explanation?

143. chemistry

A solution containing 5.00g of solid Al2(CO3)3 dissolved in water to a total volume of 200. mL is combined with 140. mL of 1.0 M HBr. Write the total of ionic equation for the reaction described below and find the molar concentration of all ions remaining

144. Physics

FM radio signals are electromagnetic waves transmitted between frequencies of 88 MHz and 107 MHz. Find the range of wavelengths for these signals. largest I have used the equation, but im doing something wrong, so if i could get the answer instead of just

145. Literature

When you finish Antigone , you’ll write an essay analyzing the causes and/or effects of an issue, situation, or event in your journal. Your textbook explains the assignment this way: “…you’ll help readers understand an event or situation by

146. french

I don't know if any of you have read le compte de mont cristo but there are two questions I am confused about. On what project did the abbot work? and after having encountered Dantes in prison, what did the abbot learn and what was his plan?

147. raiots and perimeter

you have to figures that are similar, large one is 28yds, and the smaller one is 8yds. give the ratio of the perimeter and the ratio of the areas of the larger figure to the small one. Can someone please help not just answer but explain

148. statistics

Suppose that a random variable Y has a probability density function given by f(y) = ( ky 3 e y=2 ; y > 0 0; elsewhere: Find the value of k that makes f(y) a density function.

149. language arts

My mom went to the grocery store.she forgot her purse

150. chemistry

Which metal,Pd or Pt has the lowest specific heat?Explain why, using the law of Dulong and Petit.

151. Geometry

If AB= 9 centimeters and BC= 12 what does Ac equal ? and it is a right triangle .

152. Math Probability

If the probability that event A will happen is 1/4 and the probability of A not happening is 3/4, find the probability that event A happens 3 times out of 7 experiments

153. accounting

Question: Because Aqua Elite, Inc. is a new startup business, the beginning balances in all the general ledger accounts are zero to start. n The length of the accounting periods are three months using a fiscal calendar year. (A fiscal calendar is on a

154. Math

If a number cube is rolled, what is the probability of rolling a 3, given that the number rolled was odd?

155. Math

A bag contains 5 red balls and 4 white balls. Two balls are drawn at random from the bag. The first ball drawn is put back into the bag before the second ball is drawn. What is the probability that two balls drawn are both red?

156. physics

waves propagate down a 25 gram string at 35 m/s. If the string has a length of 1.5 meters, what is the magnitude of the tension acting on it?

157. maths

Xuan Yun has a total of 24 coins in her piggy bank. Some of them are twenty-cent coins and the others are fifty-cent coins. Thetotal savings is \$6.90. How many twenty-cent and fifty-cent coins does she have?

158. algebra

Cupcakes cost \$1.50 each to produce with fixed cost of \$50. Express the cost C, of producing the cupcakes as a linear function of x cupcakes produced.

159. Chemistry

Are hybridized orbitals used to explain the fact that the four bonds in methane are equivalent? If not, what is?

160. algebra

Cupcakes cost \$1.50 each to produce with fixed cost of \$50. a) Express the cost C, of producing the cupcakes as a linear function of x cupcakes produced. b)Find the average cost, C=C/x and simplify appropriately. c) What is the horizontal asymptote of C?

161. Phsyics

A cannonball is fired into the air with a speed of 42 m/s from a height of 28 m, with what speed does the cannonball hit the ground?

162. microeconomic

Mexico produce only two goods, fish and coconuts. They only consume goods produced within their own country and do not trade with anyone. However Mexico needs more fish now.if they produce more fish they have to give up more coconuts. In the neighbor

163. ALGEBRA

Contract the expressions. That is, use the properties of logarithms to write each expression as a single logarithm with a coefficient of 1. text ((a) ) ln\(3\)-2ln\(4\)+ln\(8\) ((b) ln\(3\)-2ln\(4+8\) (c) )ln\(3\)-2(ln\(4\)+ln\(8\))

164. economics

Mexico produce only two goods, fish and coconuts. They only consume goods produced within their own country and do not trade with anyone. However Mexico needs more fish now.if they produce more fish they have to give up more coconuts. In the neighbor

165. ALGEBRA

Find a simplified value for x by inspection. Do not use a calculator. (a) log5(25) = x (b) log2(16) = x

166. Calculus

Use theta equals inverse tangent of 28/x minus inverse tangent of 6/x to show that theta also equals 22x/(x^2=168).

167. ALGEBRA

(a) Write the expression in terms of natural logarithms. (Express all logarithmic functions in terms of ln(x) in your answer.) log_(8.5) \(127\) = Give a calculator approximation (correct to four decimal places). log_(8.5) \(127\) ~=

168. to ms.sue

this is what i flunked. SCIENCE for magnets and electricity!

169. math

last thing i promise ok the length of the wing of a model airplane is 3 in. if th escale of the model to the actual plane is 1in=25ft wha tis the length of the actual wing? is it 8.3 or 0.12

170. math

Colin is working to earn some money for a CD player.On Saturday he earned half as much as he did on Sunday,but twice as much as he did on Friday.During those three days he earned \$70.How much did he earn each day?

asked by hates math
171. Geometry

A performance was rated on a 3-point scale by an audience. A rating of 1 was given by 30%, a rating of 2 was given by 60%, and a rating of 1 was given by 10%. To the nearest tenth, what was the average of the ratings?

172. Geology

Granite age for Scottish highlands

173. Chemistry

what volume of ammonia gas will be produced when 1.26L of nitrogen react completely in the following equation? N2 + 3H2 > 2NH3 Please if someone can just give me the order of operation it will be much appreciated because chemistry is just not my forte.

174. Math

I need help trying to write out these binomial expansions: they all need to be raised to the 8th power. Thanks 1. (x + y) 2. (w + z) 3. (x - y) 4. (2a + 3b) - Now explain how your answer for #1 could be used as a formula to help you answer each of the

175. Chemistry

The pH of a 0.100 M solution of an aqueous weak acid (HA) is 4.00. What would the Ka for the weak acid be?

176. anatomy and physiology

what lifestyle factors of the muscle affect the growth, development, size and/or healing (positively or negatively) of the tissue?

177. physics

FM radio signals are electromagnetic waves transmitted between frequencies of 88 MHz and 107 MHz. Find the range of wavelengths for these signals. largest___m smallest___m

178. social grade 10

Historical Globalization & imperialism PLEASE HELP! Did imperialism lead to a better life for European immigrants to Canada?

179. physics

FM radio signals are electromagnetic waves transmitted between frequencies of 88 MHz and 107 MHz. Find the range of wavelengths for these signals. largest___m smallest___m

180. algebra

solve for x: -5 is less than or equal to 2(2x+5)-7

asked by Lover Girl
181. algebra

The third, the fourth and the fifth terms of a G.P. are (w+6), w,and (w-3) respectively. a. Find the value of w. b. Find the common ratio

182. algebra

If (x-3) is a factor of 3x^3+bx^2-17x-12. a. Find the value of b. b.Hence , find the roots fo the equation 3x^3+bx^2-17x-12=0.

183. physics

The relationship between magnetic force and magnetic pole strength is similar to the relationship between which of the following?. A) force, mass, and distance as in Newton's law of gravity.B) All of these.C) current, voltage, and resistance as in Ohm's

184. Math Probability

a bag of hershey miniatures candies contain 18 milk chocolates, 9 Mr.good bars, 9 krackel bars and 8 hershey dark chocolate. if a candy is chosen at random, find the probability that it is A) A krackel or a Dark chocolate B)Not a milk Chocolate bar?

185. Math Probability

At a political rally there are 20 republicians 13 democrates 6 independents. if a person is chosen at random what is the probability that the person is either a democrate or and independent?

186. Math Probability dice roll

two fair dice are rolled, find the A)odds of getting a 9 B) the odds against getting a 12

187. math(functions)

Find the inverse of f for which f is defined as f:x-(2x minus 1)divided by (2x plus 1)

188. physics

the temperature of a body falls from 30C to 20C in 5 minutes. The air temperature is 13C. Find the temperature after a further 5 minutes.

asked by frank fred
189. physics

Jahna and Raul move onto the setup for experiment 2. They have been asked to determine both the mass of the rod and the mass of the hanging object. They know the length of the rod, the position of the hanging mass, anf the positions and readings of the

190. physics

distinguish between Root mean square velocity, Most probable velocity, and Average velocity of gas molecules.

asked by frank fred
191. Chemistry

What mass of oxygen is consumed when 1.73L of carbon dioxide (STP) are produced in the following equation. C4H8 + 6 O2 > 4 CO2 + 4 H2O please help and show your work. My answer for this problem is 11.12g/O2. I have no confidence in my answer.

192. ALGEBRA

Evaluate the given expressions (to two decimal places). (a) log((23.0) ((b) log_(2) \(128\) text((c) ) log_(9) \(1\)

193. MTH214

Determine the height of a tower if it casts a shadow 156 ft long on level ground when the angle of elevation of the sun is 20°. (Round your answer to the nearest hundredth)

194. ALGEBRA

The Greek God Zeus ordered his blacksmith Hephaestus to create a perpetual water-making machine to fill Zeus' mighty chalice. The volume of Zeus' chalice was reported to hold about one hundred and fifty sextillion gallons (that is a fifteen followed by

195. algebra

The week before the big concert, five friends Alan, Ben, Cameron, Derryck, and Garrett, stood in line to buy tickets. There were other people there, but the five friends were in the line in the order listed above. The line was really long, and they were

196. bio anatomy

whaat are some genetic variations of the occipital lobe?

197. Geometry

How many different integer values of n satisfy the inequality 1/13 < 2/n < 1/10? F. 1 G. 2 H. 3 J. 4 K. 5

198. ALGEBRA

Solve the equations. ((a) ) (2 L)/(5) = 2 L = ((b) ) 4 = (4 M)/4 + 8 M =

199. social 10

(forms of imperialism) What are 3 ways that the new imperialism led to World War 1? PLEASE HELP!

200. algebra

Perform the division, x squared + 16x +63 divided by x + 7

201. math

Suppose the weekly use of gasoline for motor travel by adults in North America is approximately normally distributed, with a mean of 14 gallons and a standard deviation of 6 gallons. What proportion of adults use more than 18 gallons per week?

202. Math

A simple dartboard has three areas the main board has a radius of 9 inches there is a circle with a radius of 5 inches ans the bullseye has a radius of 3 inches What is the proability of a random dart landing inside the bullseye Round to the nearest 1000th

203. Calculus

Evaluate the definite integral from -π/2 to π/2 of (x^4) (sin x)/(1 + x^0)dx.

204. algebra

Find the coefficient of the fifth term in the expansion(rootK+3)^8

205. English

Hi. I will appreciate some help. Do you think it's possible to say "to attend to the guests" (i.e. take care of the guests)? Thank you very much for help.

206. Pre-Calc Help!!!

Find sin x/2, cos x/2, and tan x/2 from the given information. cos x=− 4/5, 180° < x < 270° sin(x/2= cos(x/2)= tan(x/2)=

207. Pre-Calc !!!

Prove the identity. 2tanx/1+tan^2x=sin^2x

208. Calculus

use law of cosines to show that theta equals inverse cosine of (a^2 + b^2 -484)/(2ab) where a^2=(7+xcos a)^2 + (28-xsin a)^2 and b^2=(7+xcos a)^2 + (xsin a -6)^2

209. maths

Auston,Ben and carl spent all their mone on a dinner which cost \$60. Auston paid thrice amount of money paid by Ben and Carl. Ben paid \$1.60 more than Carl. If they were to share the cost of the dinner equally, how much must Ben and Carl each return to

210. maths

A rectangular piece of wood measures 3.48m by 2.28m. Ali wishes to cut squares of the largest possible size from it without any leftover. What is the length of each square piece?

211. statistics

the manufacturing of jstcare automobile uses a random sample of 500 car owners to determeine if the proportion of satisfied caar owners is different for jetcare than for other cars a)perform a hypothesis test t the 5 percent level if the sample contained

212. Geometry

How do I find the perimeter of the rectangle (l=10.6in and h=6.1 in

213. history

what is the outcome of the battle of Marthenon?

214. ALGEBRA

Find the number of decibels for the power of the sound. Round to the nearest decibel. A rock concert, 5.21 multiplied by 10-6 watts/cm2

215. ALGEBRA

A seismograph 300 km from the epicenter of an earthquake recorded a maximum amplitude of 5.4 multiplied by 102 µm. Find this earthquake's magnitude on the Richter scale. (Round your answer to the nearest tenth.)

216. ALGEBRA

(1)/(2) log\(x\) - log\(10000\) = 4

217. algebra

HOW IS 1/(-2)³ THE SAME AS - 1/8? I understant that -2 x -2 x -2 = -8 but why does the entire fraction become negative? I would think the answer would be 1/-8? Not -1/8? Are they the same thing? This is GMAT study question.

218. ALGEBRA

Solve the equations by finding the exact solution. ln\(x\) - ln\(9\) = 3

219. algebra

Marissa has budgeted \$65 for her monthly cell phone expense. If her plan with her wireless provider is \$15 plus \$0.25 for each minute, how many minutes can she talk on her cell phone in a month and not exceed her budget?

220. algebra

HOW IS 1/(-2)³ THE SAME AS - 1/8? I understant that -2 x -2 x -2 = -8 but why does the entire fraction become negative? I would think the answer would be 1/-8? Not -1/8? Are they the same thing? This is GMAT study question.

221. ALGEBRA

Use the definition of logarithm to simplify each expression. (a) )log_(3b) \(3b\) ((b) )log_(8b) \((8b)^6\) (c) )log_(10b) \((10b)^(-13)\)

222. ALGEBRA

Evaluate the given expressions (to two decimal places). (a) ) log((23.0) (b) ) log_(2) \(128\) (c) ) log_(9) \(1\)

223. algebra

Copy Cats charges a \$21 surcharge for a batch of colored copies plus \$0.15 per page. Heritage Printing charges a \$25.50 surcharge for a batch of colored copies plus \$0.12 per page. How many pages of colored copies would make Heritage Printing cheaper than

224. physics

One mile of copper wire has a resistance of 13 Ω. Using the wire to electrically connect two terminals that are half a mile apart, rank the following situations in order of increasing resistance. I. Use the full length of wire. II. Cut the wire in half

225. math

In Mr. Roberts class there are 30 children. 18 of them are girls. What percent of the children in Mr Roberts class is girls?

226. Social Studies 4th grade

What challenges occured to Native American culture when they had contact eith European Settlers? 1. Spread of Disease 2 Increased Barter 3 Decreased Population 4 Inreased Conflict / War 5 ????????

227. English

Can you check if the various exercises are all possible? Thank you, Writeacher. Here is exercise 1. •1) The new German teacher (arrive) _______on Tuesday, for his first lesson. 2) On Saturday night we (meet) _______our friends in the square at 3

228. English

I need help writing a thesis statement on the power of research.

229. math

If 10 points are arranged on a circle, how many lines are needed to join every point to every other point once? First solve simpler problems to determine a pattern.

230. anatomy and physiololgy

what lifestyle factors of the bone affect the growth, development, size and/or healing (positively or negatively) of the tissue.

231. College Physics

A 30.0 m steel wire and a 22.0 m copper wire, both with 1.00 mm diameters, are connected end to end and stretched to a tension of 170 N. How long does it take a transverse wave to travel the entire length of the two wires? (Take the mass per unit length of

232. life orientation

five ways in which the human or environmental problem impacts on the community

asked by mandisa moloi
233. Operations Management

What are some examples of companies that rely heavily on IT for effective supply chain management?

234. Chemistry

One more question: Which of the following effectively increases the reactant concentration? Is it: heating the reactant mixture or increasing pressure Thanks!

235. ALGEBRA

3x2 = 17x + 6

236. Algebra II

You have a 12 gallon bucket filled with water, and empty 7 and 5 gallon buckets. Without using any other measuring devices, and without estimating a half-way point on the buckets, how can you equally divide 6 gallons of water into 2 of the buckets. PLEASE

237. social 10

Historical globalization & imperialism If my ancestors were not indigenous Canadians what 3 motives for imperialism would make them immigrate to Canada? please help

238. physics

an electron has a kinetic energy that is 1.8 times its rest energy. What is its speed, expressed as a fraction of the speed of light?

239. Under the Sea

I was really impressed by the diversity of dresses that our creative team came up with! A round of applause for the FHFH designers, please!

240. algebra

convert 4mm x 10cm x 2mm in to feet and inches

241. physics

An electric motor best makes use of the fact that on a current-carrying wire in a magnetic field there exists which of these?. A) electromagnetic energy to be tapped.B) rotation.C) All of these.D) a force.E) a changing voltage. Is this roation or all of

242. Math

If i had a 65% in a course now, and i need a 70% to pass, What will i need to get on my final exam worth 25% to pass the course?

243. Tax (HELP Plz)

Jim Johnson has 40% interest in Richards and Johnson, LLP. The partnership has the following activity for the year: Sales \$180,000 Cost of Goods Sold 105,000 Guaranteed Payment to Ron Richards 25,000 Depreciation 11,000 Interest Expense 1,000 Tax-Exempt

244. lifeorentation

Identify and discribe one environmental problem that causes ill ,accidents,crises and disaster

245. English

The Modern Drama collection theme is Opening Doors. Discuss examples of the ways in which doors and keys are used as symbols in The Miracle Worker. Make at least two references to specific details in the play to support your ideas.

246. math

how many feet are there in 4,000 miles?

247. History (To Mrs. Sue)

The major difference in ethnicity, religion, and settlement patterns of California: A. was founded by Spain, was Catholic, and settled very early in the 18th century B. they were completely successful in Christianizing the indians C. the area was dominated

248. ALGEBRA

ln\(e\) = ln\( sqrt(2)/x \) -ln\(e\)

249. ALGEBRA

Solve the equations by finding the exact solution. (a) 1 = x - 1 (B)

250. to ms.sue

thank you so much! so it would be like a class right? when do i get started? thank you sooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooo

251. math

1. Gina wants to begin by figuring out how long the corn bed will be. She knows that in her previous two gardens, she was able to plant 2 rows in a 5 foot long space and 5 rows in an 11 foot long space. Find a linear equation for the length of the bed (y)

252. physics

define black body, emissivity, solar constant in relation to heat transfer.

asked by frank fred
253. math

Marissa has budgeted \$65 for her monthly cell phone expense. If her plan with her wireless provider is \$15 plus \$0.25 for each minute, how many minutes can she talk on her cell phone in a month and not exceed her budget?

254. life orientation

in 10-15 lines critically discuss 5 ways in which the human or environmental problem impacts on the community.provide relevant sources to support your claims?

255. English

Can you please check the sentences? Thank you, Writeacher. 1) Are there any questions before you start? Did you have any difficulty in doing your homework? 2) Take a photocopy and pass the others on. Share these copies, one between two. Please, keep an eye

256. history

According to the doves(people opposed to the Vietnam war) answer this question. Was the motive for US involvement in Vietnam primarily to help the average South Vietnamese citizen or was it primarily to gain a power advantage over Russia and China? That

257. math

At a political rally there are 20 republicians, 13 democrates, 6 independents. If a person is chosen at random what is the probability that a) the person is either a democrate or and independent?

258. Math

Hello, I need help with a 5th grade math question. The red train returns to central station every 45 min. The blue train returns to central station every 60 min. If both trains leave the station together, in how many min. will they both be back at the

259. English

I left out two exercises for you to check. Thank you very much, Writeacher. By the way, do you say "talk about a topic of your choosing/or of your choice? 1) I ……………………… buy any butter, mum has just bought some. (Shall I include a colon

260. Chemistry

Are the concentrations of CO, H2O, CO2 and H2 necessarily equal

261. economics

Explain why the productivity standard for the distribution of income entails rewarding people based on their contribution to society s total output. Why does the productivity standard typically fail to yield an equal distribution of income?

262. Algebra

For what values of x is x/[x(3x-4)] undefined?

263. chem

Hey you guys how do you find the moles of .75g of He

264. Algebra

What is the vertex of y=(x-2)^2 +5?

265. Algebra

(100x^3y^-2)/(64x^7y^4)

266. Consumer Math

Joey-O's Organic Farm Financial Plan Revenues Budgeted Amounts From Farming \$70,000 From Sales 8,200 Total \$78,200 EXPENSES : Fertilizer \$3,000 Pesticides 400 Feed 1,500 Equipment 1,700 Salaries 21,200 Supplies 300 Utilities 2,800 Insurance and interest

267. College Math

Consider the following expression. 3(x-2)-9(x^+7x+4)-5(x+8)

268. Chemistry

If a chlorine atom is lost from 1,2-dichloroethene [C2H2Cl2], would it have a higher or lower dipole?

Historical Globalization & IMPERIALISM I HAVE POSTED ABOUT 8 QUESTIONS THAT I REALLY NEED THE ANSWERS TO, I HAVE SAT HEAR ALL WEEKEND AND JUST DON'T GET THEM I HAVE JUST GOT MYSELF SO CONFUSED SO COULD YOU PLEASE HELP ME, I'M SO TIRED AND FED UP! THANK YOU

270. algebra

a ball falls from a height of 2.4m and bounces from the same spot, each bounces rise to 3/5 the height of the preceeding bounce. a. write the series of the movement from start to the eighth bounce. b.Find th etotal distance moved by the ball as indicated

271. algebra

Complete the tables for y=2^x and y=log base 2 x+3 y=2^x x -2, -1, ?, ? 2. y 0.25, ? 1 2 ? y=log base2 x +3 x ?, ?, ?, 1, ? y 0, 1, 2, 3, 4.

272. physics

last one before I got to go to work Which of these cities has the smallest incidence of cosmic rays? A) All about the same.B) New York City.C) Mexico City.D) Singapore.E) Anchorage.

273. bio anatomy

I am doing a paper on the occipital lobe and I am supose to talk about the pathology of it. i know that is like the study of disease of the lobe. So should i talk about different diseases that occur in the lobe? like maybe choose three different ones or

274. John F kennedy jr

I am confused. Was John !@#\$%^&ennedy Jr. murdered by a supposed bomb on the aircraft?? Or was it just a regular plane crash?

275. math

Kate is at a T-shirt sale where she can buy one and get a second one for 30% off. She wants to buy two T-shirts listed at \$19 each. How much will she pay?

276. Math

How many Terms does the binomil expansion on (X^2+2y^4)^25 have? a.23 b.24 c.25 d.26 e.27

As a professional photographer, Marion has seen the trend away from film cameras as customers purchase low-end digital cameras and printers in order to avoid processing fees associated with film-based cameras. She would like to offer a new service to

278. math

the length of the Amazon River in South America is about 4,000 mi. How many feet is this?

279. physics

Two students, Jahna, and Raul, re performing Experiment 1. To simplify their calculations, each will apply their force perpendicular to the arm of the apparatus. Jahna attaches her spring scale 15cm from the pivot and pulls with a force of 2.5N. Raul

280. ALGEBRA

Solve the equations by finding the exact solution. ln\(x\) - ln\(9\) = 3

281. to ms.sue

i ave problems. over the summer, can you teach me because my parents don't have enough money to pay.

282. math

what is a scale? example please

283. Calculus

Evaluate the integral from 0 to 24 of the square root of 9+3x dx.

284. history social

i need help to make a love poem

285. chemistry

What are the total grams of iron

286. History, World

How many innocent South Vietnamese citizens were killed during the Vietnam war?

287. elements and compounds

iron and bromine

288. com220

how do I go about a full sentence outline for the effects of tanning salons

Assignment Type: Individual Project Deliverable Length: 4-5 body pages, 1 PERT chart, 1 Gantt chart Points Possible: 185 Due Date: 4/22/2012 11:59:59 PM CT Using your current work organization (or an organization of interest) as the subject matter,

290. pre cal

does anyone take pre-cal online ?

291. English

Here is the second exercise. Thank you very much for the revision. 1) John ……………………… buy the dictionary for the exam: he can take mine. 2) You ………………………stand on the left on the escalators. 3) I

292. Life orientation

In 10-15 lines critically discuss 5 ways in which the human or environmental problem impacts on the community

293. chem 101

60F is 15.55 C 180 F is 82.22C delta T = 82.22-15.55 = 66.67 q = mass x specific heat x delta T q = 100g x 4.184 x 66.67 q = 278,947 = 279 kJ. Burning alcohol (46 g ethanol) provides 1238.43 kJ/mol. We want to know how many g ethanol to burn to provide 279

294. Learn

the length of the paper is 12 feet then what is the approximate area of the paper

295. English

I urgently need you to check this paragraph. Thank you, Writeacher. 1)Henry II was successful in bringing order and stability. 2) To avoid civil wars, he needed to reduce the power of the barons and wanted professional soldiers (mercenaries) to do this.

296. Math

A ladder is placed 6 ft aainsgt a 25 ft building. How high above the ground does the ladder touch the wall?

297. sliva

a solution is made by dissolving 3.95g of NaCl in 78.2 mL what is the concentration of sodium chloride in units of weight/volume percent

298. math

Who am I? If you multiply me by 6 and subtract 11, the result is 73.

299. math

john made 1,620 last week. of that amount 1/5 went toward taxes ans 1/4 was spent on rent. what is the best estimate of how much money went tiward taxes and rent?

300. math

A=20 m2, b=_________, h=4m

301. Health Science

Implementation of informatics has shown to be effective in many areas of health care. Perform a brief literature review and discuss one area that has shown significant savings in the operating budget.

302. Algebra

Solve for x: |x-6|>7

303. Algebra

Solve for x: (x/4)-(5/x)=(1/4)

304. Consumer Math

What types of expenditures could you include in a budget for a working student? Do you need to save money, or can you spend all of your wages?

305. College Math

A seismograph 300 km from the epicenter of an earthquake recorded a maximum amplitude of 5.3 102 µm. Find this earthquake's magnitude on the Richter scale. (Round your answer to the nearest tenth.)

306. social 10

Why is the "new imperialism" called the first era of globalization? PLEASE HELP!

307. Algebra

What is the domain and range of the equation y=-x^2-4x-7?

308. social 10

what would be a good statement to describe the differences between globalization & imperialism? PLEASE HELP!

309. Physics

a parallel plate capacitor, 10µF with air between its plate is connected to a 50 volt source and then disconnected. a)What is the charge on the capacitor and the potential difference across it.

310. math

iwant help wth reduction formula

311. Math

A number is drawn at random from {1,2,3,4,5,6}. What is the probability that either a number larger than 3 or an even number will occur?

312. sewing

when plannin a one piece facing for the armhole of a sleeless dress, the grain line of the facing should be taken from the

313. thermodynamics

0.5 kg of saturated vapor is contained in a closed system with pressure of 10 bar is cooled at constant volume until pressure decreases to 5 bar. Determine heat transfer and sketch the process in a P-v and T-v diagram answer = -473.35 kJ(heat is

314. english

is the example "... waves rumbled across the reef..." a metaphor???

asked by nicole a
315. science

what is buffer (ing) solution and its application with one example? and buffer system in blood?

asked by erode kathirvel
316. math

when a cross tile is placed on a number plane the centre number is the average of al the numbers covered. Explain why

317. math

4y-y+2/Y To 2nd power+3y

318. maths

solve the folling equation using grammars 2x+4y+z=9

asked by abraham jerry
319. SOCIAL STUDIES

HOW OLD IS THE GREAT BARRIER REEF?

320. math

Use a net to find the length and width of a single sheet of paper that could be used to wrap the entire gift box. l = 6 in w = 4 in h = 2 in

321. Math

Kirk has 25 marbles and 14 seashells. What information is needed to find the number of marbles that are NOT cat's eyes?

322. sector and diameter

Find the area of a sectorwith a central angle 0f 190degree and a diameter of 5.1cm. Can someone please help?

323. Math Need Help NOW!!!!!!!!!

HELP! I forgot what a factor and multiple Mean.

asked by Nix The Robot (is a Zelda fan)
324. grade 6 math

how many rectangles can have the perimiter of 46m

325. math

there is no width

326. social 10

Historical Globalization & imperialism Should the Europeans have tried to change the beliefs of thr people in their colonies during imperialist times? could you please give me some reasons. Please help