# Questions Asked onApril 18, 2011

1. ## spanish

Using the subject “usted” and the verb in the imperative, tell your instructor three things she or he must do. Then tell your instructor two things she or he must not do. You will be graded on accuracy and pronunciation. Provide your sentences in

2. ## Spanish

A mis amigos 1.___ mucho la comida de la cafetería. A Esmeralda 2.___ las papas fritas y los refrescos. A Rodrigo 3.___ más la fruta. A mí 4.___ los sándwiches y la leche. Pero a todos nosotros 5.___ mucho el yogur. Y a ti, ¿qué 6.___ ?

3. ## Physics

A ray of light of frequency is 5.09 x 10^14 Hz is traveling from water to medium X. The angle of incidence in water is 45 degrees and the angle of refraction in Medium X is 29 degrees. Calculate the index of refraction

4. ## Calc 2

Find a Cartesian equation for the polar curve y = 5tan(theta)sec(theta). I think I got it but I just wanted to double check. Thanks in advance!

5. ## geometry

In the diagram below of isosceles trapezoid DEFG, DE ll GF. DE = 4x − 2, EF = 3x + 2, FG = 5x − 3, and GD = 2x + 5. Find the value of x. the answer is 3 but idk how, please help

6. ## Spanish

What do the following people like? Write the correct form of the verb gustar in each sentence. 1. A mí la cena que prepara Sebastián. 2. A Patricia las hamburguesas, las papas fritas y los refrescos. 3. A nosotras la comida nutritiva. 4. A ustedes las

7. ## Calc

At the time of the birth of a child, a parent wants to begin a college fund that will grow to \$50000 by the child's 18th birthday. Interest is compounded continuously at 8.5%. What should the initial investment (P0) be?

8. ## Physics

1) Part A: Two pellets, each with a charge of 3 × 10−6 C, are located 0.03 m apart. What is the electric force between them? The value of the Coulomb constant is 8.99 × 109 N · m2/C2 and the universal gravitational constant is 6.67259 × 10−11 m3/kg

9. ## physics

An FM radio station broadcasts its signal at a frequency of 9.15 ×107 hertz. Determine the wavelength of the signal in air. Round your answer to the nearest hundredth of a meter.

10. ## chemisrty

what is the balance equation of CH3COOH(aq)+NH3(aq)

11. ## Chemistry

Calculate [OH-] and pH for the following strong base solution: 10.0 mL of 0.0105 M Ca(OH)2 diluted to 500.0 mL

12. ## Thermochemistry

The enthalpy formation of ethanol, C2H5OH, is -277.0 kJ/mol @ 298.15 K. Calculate the enthalpy of combustion of one mole of ethanol, assuming that the products are CO2(g) & H2O (l).

13. ## math

Name the lengths of the sides of three rectangles that have perimeters of 14 units.

14. ## Chemistry

If you were to prepare a 1.00 molal solution of CaCl2 beginning with water at 27.0 C, what would the final temperature of the solution be (in C)? Assume that the specific heats of both pure H2O and the solution are the same, 4.18 J/K*g. The dissolution of

15. ## Spanish

What do the following people like? Write the correct form of the verb gustar in each sentence. 1. A mí la cena que prepara Sebastián. 2. A Patricia las hamburguesas, las papas fritas y los refrescos. 3. A nosotras la comida nutritiva. 4. A ustedes las

16. ## Geometry

The lateral area of a regular pyramid is 300 square units. The perimeter of its base is 100 units. Find the slant height of the pyramid. my answer is 5 units is this correct?

17. ## chem

the root mean square speed of a certain gaseous oxide is 493 m/s at 20 C. what is the molecular formula of the compound. how is the answer NO???

18. ## English

Need to underline the noun or pronoun and circle the word that modifies it.... 1. Countless pioneers crossed this vast continent. Noun=pioneers Adj=countless, Noun=continent Adj=this,vast 2. Some people wanted rich, productive farmland. Noun=people

19. ## science

How many grams of glucose (180g/mole) would be needed to make 100ml of a 1.5 M solution?

20. ## math

Please can you me What a linear inequality describes the graph of a dashed line passing through (0,3) and (6,0) with the space beneath the graph shaded?

21. ## physics

A sphere of mass M is supported by a string that passes over a pulley at the end of a horizontal rod of length L. The string makes an angle è with the rod. The fundamental frequency of the standing waves in the portion of the string above the rod is f.

22. ## science

How large a current would a very long, straight wire have to carry so that the magnetic field 2 cm from the wire is equal to 1 G (comparable to the earth’s northward-pointing magnetic field)?

23. ## physics

an electric motor lifts on elevator 9 m in 15s by exerting an upward force of 1.2 x 10^4 calculate the power

24. ## Algebra

The tour de France is a bicycle race that begins in Ireland but is primarily a race through France. On each day, racers cover a certain distance depending on the steepness of the terrain. Suppose that one particulAr day the racers must comp,tee 210 mi. One

25. ## HELPPP

Solve the linear programming problem by the method of corners. Minimize C = 5x + y subject to x + 3y ≥ 43 x + y ≥ 27 x ≥ 0, y ≥ 0

26. ## Chemistry

Calcium fluoride is the well-known mineral fluorite. It is known that each unit cell contains four Ca2+ ions and eight F- ions and that the Ca2+ are arranged in a face-centered cubic lattice. The F- ions fill all the tetrahedral holes. The edge of the CaF2

27. ## physics

With the forces in equilibrium if a stationary climber is using a rope which is 60 degrees to the vertical, the rock face is at 30 degrees to the vertical, and the weight of the climber in cluding equipment is 850N. What is the tension on the rope? What is

28. ## physics

a very bright source of red light has much more energy than a dim source of blue light, but the red light has no effect in ejecting electrons from a certain photosensitive surface. why is this so?

29. ## math

. Find the volume of the sphere with a radius of 9. Use ð = 3.14 and round your answer to the nearest tenth. 4. Find the volume of an ellipsoid with a semi-major axis of length 10 and the first semi-minor axis has length of 6 while the second semi-minor

30. ## algerba 1

From the top of a lighthouse 210 feet high, the angle of depression to a boat is 27. Find the distance from the boat to the food of the lighthouse. The lighthouse was built at sea level. Help me!

31. ## Math

An airplane rises vertically 1000 feet over a horizontal distance of 1 mile. What is the angle of elevation of the airplane's path? (hint: 1 mile = 5280 feet)

32. ## caprock

Hachure lines, or lines with teeth, describe

33. ## math

Richard is flying a kite. The kite string makes an angle of 57 degress with the ground. If Richard is standing 100 feet from the point on the ground direcly below the kite, find the length of the kite string.. Please help!!!

34. ## statistics

) Overproduction of uric acid in the body can be an indication of cell breakdown. This may be an advance indication of an illness such as gout, leukemia, or lymphoma. Over a period of months, an adult male patient has taken eight blood tests for uric acid.

35. ## chemistry

At room temperature, 20° C, water (H2O) is a liquid and oxygen (O2) is a gas. Based on kinetic molecular theory, which answer best explains the states of the two fluids?

36. ## chemistry

Is there a relationship between HOMO & LUMO and bonding & antibonding? Explain.

37. ## geometry

Find the surface area of a rectangular prism with a length of 8 inches, a width of 5 inches and a height of 2 inches. so far this is what I have- (2(8)+2(5))2=72 + 2(8.5)=80 my answer is 152in^2 the books answer is 132in^2 What did I do wrong???? Thanks

During the 2011 student's orientation at Unam, it was reported that number of male students who attended the orientation was nine hundred and forty less than four times the number of female students. a) From the statement above, formulate a mathematical

39. ## geometry

I have a circle with a radius of 20in. Arc mEGF = 235(not shaded part of circle) find the area of arc EF (shaded sector of circle). My answer was 82.3 in^2 correct answer is 436.3 in^2 I need disrection on this one- I was really off on my answer.

40. ## chemistry

Ammonia, NH3, for fertilixer is made by causing hydrogen and nitrogen to react at high temperature and pressure. How many moles of ammonia can be made from 0.15 moles of nitrogen gas?

41. ## Managerial Economics

As vice president of sales for a rapidly growing company, you are grappling with the question of expanding the size of your direct sales force (from its current level of 60 national sales people) You are considering hiring from 5 to 10 additional

42. ## Physics

A charge of 0.25 C moved from a position where the electric potential is 20 V to a position where the potential is 50 V. What is the change in potential energy?

43. ## Probability/Statistics

A secretary addresses 50 different letters and envelopes to 50 different people, but the letters are randomly mixed before being put into envelopes. What is the probability that at least one letter gets into the correct envelope?

44. ## Math

In a shipment of 1000 light bulbs 1/40 of the bulbds were defective. What is the ratiio of defective bulbs to nondefective bulbs?

45. ## physics

A DVD is spinning at 180 rpm’s. Calculate its angular acceleration when it increases to 240 rpms’s in 2 seconds. (Remember, convert rpm’s to radians/second)

46. ## Physics

Orange light (wavelength=600nm) is passes through a single slit. Use a=2000nm and L=2m. a) Determine the linear size on the screen of the 2nd maximum (not including the central maximum). b) Determine how many total maxima occur in the pattern. a) I thought

47. ## Physics

Orange light (wavelength=600nm) is passes through a single slit. Use a=2000nm and L=2m. a) Determine the linear size on the screen of the 2nd maximum (not including the central maximum). b) Determine how many total maxima occur in the pattern. a) I thought

48. ## chem

An aspirin tablet weighing 0.475 g has been analyzed and contains 68.2 % ASA (180.16 g/mol) by mass. A student dissolved the tablet in hot NaOH and the cooled solution was diluted with DI water to the mark in a 250 mL volumetric flask. Exactly 3.00 mL of

49. ## object oriented programming

We want to define a class clockType, to implement the time of day in a program. The time is represented as a set of three integers: one to represent the hours, one to represent the minutes, and one to represent the seconds. We also want to perform the

50. ## english

CAB : VEHICLE :: wasp :

51. ## physics

1)найти среднюю длину свободного пробега молекулы кислорода при нормальном давлении, если коэффицент диффузии кислорода при том же

52. ## Math

1.Isoscles obtuse triangle TRI with vertex angle T. 2.Rhombus RHOM with acute

53. ## Physics

An escalator in a department store is driven by a large electric motor whose power consumption changes with the load to keep the escalator moving at a constance velocity, up to a certain maximum power capacity. An escalator working at 0.22 of its maximum

54. ## american history

"All powers not delegated to the United States by the Constitution . . . are reserved to the States respectively, or to the people." This language, drafted by _______ and incorporated into the _______ Amendment of the Bill of Rights was intended to address

55. ## Chemistry

how many grams of solid KOH is needed to neutralize 1.00 L of 0.250 M HNO3 solution?

56. ## stastics

Following are the speeds of 40 cars clocked by radar on a particular road in a 35-mph zone on a particular afternoon: 30, 36, 42, 36, 30, 52, 36, 34, 36, 33, 30, 32, 35, 32, 37, 34, 36, 31, 35, 20, 24, 46, 23, 31, 32, 45, 34, 37, 28, 40, 34, 38, 40, 52,

57. ## Command Economies

Could I know the features of Command Economies/good and bad? I think I found their relative advantages and disadvantages. Down below. Please check, and do tell me if there are more. Thanks so much. Command Economy Advantages: -Equality is focused on

58. ## chem

A sample of O2 gas was collected over water at 23ºC and 711 torr. What is the partial pressure of the O2? (The vapor pressure of water at 23ºC is 21.2 torr.) Partial pressure of O2:_____torr

59. ## Economics

explain how the wage can adjust to balance the supply and demand for labor while simultaneously equaling the value of the marginal product of labor

60. ## Math

I have three more questions I do not understand. 1. Two points (-1,1) and (3,-2) are graphed on a coordinate plane. What is the shortest distance between the points? A. 3 B. 4 C. 5 D. 7 I have no idea how to do this. 2. Which expression represents the nth

61. ## life orientation

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

62. ## Math

From the top of a lighthouse 210 feet high, the angle if depression to a boat is 27 degress. Find the distance from the boat to the food of the lighthouse. The lighthouse was built at sea level.

63. ## Chemistry Help!

The nitrogen-to-hydrogen single bond energy is 389 kJ/mol in NH3. What is the minimum frequency of radiation having the necessary energy to break this bond?

64. ## Math

Which statement is correct? A. All intergers are rational numbers. B. All irrational numbers are whole numbers. C. A real number must be a rational number. D. A repeating decimal is an irrational number I think it's either A or C.

65. ## algebra

the mass of mars is about 6.421x10^2 metric tons. The mass of the sun is about 1.998x10^27 metric tons. About how many times the mass of mars is the mass of the sun? Give your answer in scientific notation. I came up with 1 where do I keep going wrong?

66. ## physics

Using trigonometry A patients leg is raised at an angle of 45 degrees and a traction force of 50N is applied in line with the leg; Find the vertical component of this force? Find the horizontal component of this force?

67. ## College Algebra

The length of a rectangle is 3 times the width . If the perimeter is to be at least 48 meters, what are the possible values for the width? (If the perimeter is at least 48 meters, then it is greater than or equal to 48 meters.) Enter the expression for the

68. ## Math

The chart shows the number of cars sold per week at a car dealership during the month of June. Salesperson Week 1 Week 2 Week 3 Week 4 Tim 4 8 2 1 Geena 1 2 7 1 Rafael 2 1 5 4 Sonny 4 1 1 10 How should the data be displayed to make the most convincing

69. ## Physics

The deceleration(negative acceleration) of an automobile in a full skid on the dr pavement is a little greater than one half "g" or half the acceleration you would experience in free fall. Suppose you are going down the high way and you suddenly decide you

70. ## Math

A laffer leaning against a house maes an angle of 60 degress with the ground. The foot of the leadder is 7 feet from the foundation of the house. How long is the ladder? Please help.

1.¿Qué aprendas en la clase de español? Yo aprendo hablar y escribir en español. 2.¿Qué piensas hacer mañana? Pienso ir a una escuela. 3.¿Te gusta la escuela? Por qué? Sí, me gusta la escuela. Porque yo aprendo mucho en escuela y saco buenas

72. ## math

Richard is flying a kite. The kite string makes an angle of 57 degress with the ground. If Richard is standing 100 feet from the point on the ground direcly below the kite, find the length of the kite string.. Please help!!!

73. ## differential equations

Search: A 8 kg mass is attached to a spring hanging from the ceiling and allowed to come to rest. assume that the spring constant is 40 n/ m and a damping constant is 3 N/m. At t=0 and external force of 2 sin(2t+PI/4)N is applied to the system. determine

74. ## Geometry

Need help I missed this problem on my test. My answer was 31.8in^2. The right answer was 8.0in^2 How should I have worked the problem: A pie has a diameter of 9 inches. Each slice of the pie has a central angle of 45 degrees. What is the area of each slice

75. ## Physics

An ice skater spins with her arms extended and then pulls her arms in and spins faster. Which statement is correct? A. Her kinetic energy of rotation increases because of the work she does to pull her arms in. B. Her kinetic energy of rotation does not

76. ## calculus

find the point on the line 6x+7y-5=0 closest to (2,2)

77. ## english

so i posted a question very similar to this yesturdya but i have now have a more spesific question. do you guys know any poems about or from the 1950's that talks abuot basic life..

78. ## Spanish Could someone please check my work? Thank

Mi primera clase que tengo es la orquesta. No es difícil pero el profesor es muy estricto. Mi segunda clase es el álgebra. Es difícil pero es muy importante. Mi tercera clase es la geografiá. Antes mi clase, tengo el almuerzo. Después del almuerzo,

79. ## Chemistry

A valence election in an atom of sulfur is excited by heating a sample. The electron jumps from the s orbital to the p orbital. What is the electron configuration of the excited sulfur atom, and what would the orbital diagram look like?

80. ## statistics

Develop the estimated regression equation to predict the city score, given the Recession Resistance rating alone

81. ## Chemistry

Find the equation that describes the energy of a photon emitted as an electron relaxes from a higher energy level to a lower one in a hydrogen atom. 6 to 1 6 to 2 6 to 3 6 to 4 6 to 5 5 to 1 5 to 2 5 to 3 5 to 4 4 to 1

82. ## Physics

The brakes on a parked car fall and it accelerates at a constant rate, rolling into a lamp post down the hill. the car reaches a velocity of 4.3m/s by the time it smashes into the lamp post. The time between the brakes failing and the smashing of the car

83. ## Algebra II

find An if n = 2 of the arithmetic sequence with An = 14n - 3 i'm lost can some one help

84. ## Integrated Physics and Chemistry

Some refrigerants used in air conditioners have been associated with.. A)somg B)destruction of the ozone layer C)thermal pollution D)power failures

85. ## physics

what is cross product or vector product plz explain it in detail.....

86. ## Algebra2/ Trig

During a baseball season, a company pledges a donation to a charity of \$5000 plus \$100 for every home run hit by the local team. Does it make more sense to represent this situation using a sequence or a series? Explain your reasoning.

87. ## Physics

A 2340 kg car traveling to the west at 20.7 m/s slows down uniformly under a force of 8340 N to the east. a) How much force would be required to cause the same acceleration on a car of mass 3180 kg? Answer in units of N. b) How far would the car move

88. ## Physics

Suppose that you want to take a photograph of yourself as you look at your image in a flat mirror 1.6 away. For what distance should the camera lens be focused?

89. ## math

From the top of a lighthouse 210 feet high, the angle if depression to a boat is 27 degress. Find the distance from the boat to the food of the lighthouse. The lighthouse was built at sea level.

90. ## math

An airplane rises vertically 1000 feet over a horizontal distance of 1 mile. What is the angle of elevation of the airplane's path? (hint: 1 mile = 5280 feet)

91. ## math

From the top of a lighthouse 210 feet high, the angle if depression to a boat is 27 degress. Find the distance from the boat to the food of the lighthouse. The lighthouse was built at sea level.

92. ## physics

The total area of contact between the tires of a racing bicycle and the road is 1.5 square inches. The bicycle and its rider weigh 171 pounds. What is the air pressure inside its tires?

93. ## Environmental Science

I have been studying for several hours and am having problems with finding the answer to this question. Can anyone help please? Conservationists argue that watershed protection and other ecological functions of forget are more economically valuable than

94. ## Chemistry

You are in the silver recovery business. You receive 55‐gal drums of waste silver solution from photography laboratories, metal plating operations, and other industrial companies. Currently, you have a drum of waste from a silver‐plating factory with

95. ## Physics

A transformer has 3000 loops in its primary coil and 1500 loops in its secondary coil. What is the voltage in the secondary coil if the voltage in the primary coil is 120 V??? ***PLEASE explain how you get the answer*** thank you:)

96. ## Science

Write a mechanism for the Claisen reaction of ethyl ethanoate (ethyl acetate) to give ethyl acetoacetate?

97. ## statitics

a light bulb manufacture gaurentees that the mean life of a certain type of bulb is at least 875 hours. A random sample of 40 light bulbs has a mean life of 863 hours with a standard deviation of 50. a=0.04

98. ## math

In how many ways can a committee of five people be selected from seven women and nine men if at least one woman must be in the committee?

99. ## math

Ben has 15 puzzles and 27cds. When he takes a trip, he likes to bring one puzzle and one cd . How many trips can he take with a different puzzle and cd pair

100. ## Math

From the top of a lighthouse 210 feet high, the angle if depression to a boat is 27 degress. Find the distance from the boat to the food of the lighthouse. The lighthouse was built at sea level.

101. ## Capitalism

Hi. I would like to know what Capitalism is in simple terms. From Wikipedia, this is what it says: Capitalism is an economic system in which the means of production are privately owned and operated for profit. Could I get more information please.

102. ## math

What is the maximum value of [z = 8x + 7y] , subject to the conditions {2x + 4y >= 4, 2x + 3y = 0, y >= 0}

103. ## physics

What average force is required to stop an 1900 car in 6.0 if the car is traveling at 80 ?

104. ## Spanish-8th please check for errors

¿Cómo se llama tu maestro de español? Mi maestra se llama es Señora Johnston. Mi maestra se llama es Maestra Johnston.

105. ## Chemistry

A hydrogen atom electron in an excited state with n = 7 drops to a lower energy state with n = 3. What is the wavelength of the light emitted in this transition

106. ## College Math

Lottery: One million tickets were sold for a lottery in which a single prize will be awarded. a)If you purchase a ticket, determine your odds against winning. b)If you purchase 10 tickets, determine your odds against winning.

107. ## Intro to Physical Science

A car whose mass is 1000 kg is traveling at a constant speed of 10 m/s Neglecting any friction, how much force will the engine have to supply to keep going the same speed?

108. ## prep chem

How many milliliters of oxygen 2(g) will be produced at 720mmHg and 17 celsius if 0.460 grams of KClO3 are reacted in the reaction? Formula is 2 KClO3 --> 2 KCl + 3 O2(g) I know to change temp into K

109. ## Calculus

Find any absolute max/min and local max/min for the function f(x)=x^3-4x+5 on the interval [0,5). Made sure to prove that these points are max/min values. This is what I did so far. f'(x)=3x^2-4=0 3x^2=4 x= 2/sqrt3 The -2/sqrt3 is outside of interval so

111. ## Math

If one leg of a right triangle is 8 inches long, and the other leg is 12 inches long. How many inches long is the triangles hypotenuse?

112. ## chemistry

describe the procedure you would follow and the information you would need to know to find the mass of a reactant in a chemical equation when you are given the mass of one product

113. ## math

A laffer leaning against a house maes an angle of 60 degress with the ground. The foot of the leadder is 7 feet from the foundation of the house. How long is the ladder? Please help.

114. ## chemistry

chlorine is a non-metal, predict what will happen if you lower some burning sodium into a gas jar of chlorine. will there be a reaction? what product will be formed?

115. ## Physics

A cylinder of oxygen has a gauge pressure of 2000psi and a volume of 16L at 70 degrees F. If the oxygen is used as a constant flow rate of 2 L/minute, measured at 1 atm of pressure, how long will the tank last? Hint: Calculate the mass (grams) of oxygen in

116. ## College Algebra

If 24% of your monthly pay is withheld for federal income taxes and another 6% is withheld for Social Security, state income tax, and other miscellaneous items, leaving you with \$989.50 a month in take-home pay, then the amount you earned before the

117. ## physics

Calculate the angular velocity of the minute hand of a clock.

118. ## Math

Richard is flying a kite. The kite string makes an angle of 57 degress with the ground. If Richard is standing 100 feet from the point on the ground direcly below the kite, find the length of the kite string.. Please help!!!

119. ## Chem

How do you find the pH for 0.010M of HNO3?

120. ## math

An airplane rises vertically 1000 feet over a horizontal distance of 1 mile. What is the angle of elevation of the airplane's path? (hint: 1 mile = 5280 feet)

121. ## Physics

The total area of contact between the tires of a racing bicycle and the road is 1.5 square inches. The bicycle and its rider weigh 171 pounds. What is the air pressure inside its tires?

122. ## accounting

(TCO 8) Partial balance sheets for ABC Company and additional information are provided below. ABC Company, Partial Balance Sheets, As of December 31 2009 2008 Equipment \$100,000 \$75,000 Accumulated depreciation (25,000) (20,000) Common stock, \$5 par

123. ## Intro to Physical Science

A car whose mass is 1000 kg is traveling at a constant speed of 10 m/s Neglecting any friction, how much force will the engine have to supply to keep going the same speed?

124. ## trigonometry

convert the polar equation r^2=2cos^2theta + 3sin^2theta into a rectangular equation

125. ## Math

An airplane rises vertically 1000 feet over a horizontal distance of 1 mile. What is the angle of elevation of the airplane's path? (hint: 1 mile = 5280 feet)

126. ## Physics

Much of the time and expense in drilling an oil well goes into changing the drill bit as it wears out. the drilling pipe must be pulled up and disassembled one section at a time in order to pull the drill bit out of the hole and replace it. A pipe 0.65

127. ## cómo comenzar a aprender inglÃ©s?

Necesito aprender inglés y no sé por donde comenzr, por favor, ayuda.

128. ## Accounting

How does an inventory write-off effect the cash flow statement?

129. ## College Algebra

If 24% of your monthly pay is withheld for federal income taxes and another 6% is withheld for Social Security, state income tax, and other miscellaneous items, leaving you with \$989.50 a month in take-home pay, then the amount you earned before the

130. ## ethics

A person driving home late one evening on a dark, deserted road comes across a single-vehicle accident. Getting out of the car and viewing the damaged vehicle, it is clear that the lone occupant, the driver, is hurt and unconscious. Wishing to help the

131. ## math

Find the # of possible choices for a 2 digit password that is greater than 19. Then find the # of possible choices for a 4 digit PIN # if the digits can not be repeated. HELP!

132. ## Accounting

a. IPC purchases real estate in prime locations where an existing theatre chain does not adequately serve the market. After purchasing the real estate, IPC engages a contractor to build a theatre complex. During fiscal 2009, IPC received a \$2,000,000

133. ## science acids and bases

what can you tell about the equations 2 P2O5?

134. ## Math

A laffer leaning against a house maes an angle of 60 degress with the ground. The foot of the leadder is 7 feet from the foundation of the house. How long is the ladder? Please help.

135. ## Science

Write a mechanism for the aldol reaction of 3,3-dimethyl-2-butanone.

136. ## Chemistry Help!

In the n = 5 principal shell, what is the maximum number of electrons that can have m1= -2

137. ## physics

While on the moon, the apollo astronauts enjoyed the effects on gravity so much smaller then that ont he earth. If neil armstrong jumped up on the moon with the initial speed

138. ## math

Maximize P = 2x − 3y subject to x + 2y ≤ 14 6x + y ≤ 18 x ≥ 0, y ≥ 0

139. ## Physics

The total area of contact between the tires of a racing bicycle and the road is 1.5 square inches. The bicycle and its rider weigh 171 pounds. What is the air pressure inside its tires?

140. ## Calculus

The position in meters of a particle is given by f(t)= 14t-3t^2, where t is measured in seconds. a) Evaluate f'(2) and interpret the results. This is how I solved this. f'(t)=14-6t= 2(7-3t) f'(2)=2(7-3(2))= 2 This means the velocity of the particle is 2

141. ## Geometry

I missed this problem on my test. I had 23 ft and the correct answer was 16 ft. How should I of worked this problem? A trapezoid has base lengths of 8.5 and 14.5 feet with the area of 184 square feet. What is the height of the trapezoid? Thanks for your

142. ## physics

What is the value of the gravitational acceleration at a height of 2000 km above the surface of the Earth?

143. ## math

In standard (x,y )coordinate plane,the graph of (x-2)^2 + (y+4)^2=9 is a circle.What is the area enclosed by this circle,expressed in square coordinate units?

144. ## Math

Richard is flying a kite. The kite string makes an angle of 57 degress with the ground. If Richard is standing 100 feet from the point on the ground direcly below the kite, find the length of the kite string.. Please help!

145. ## physics

A car with a mass of 890 kg travels at a speed of 20.0 m/s. Seeing that the road ahead is blocked by a rock slide, the driver applies the brakes, stopping the car. The work of stopping the car becomes thermal energy of the car’s four disk brake rotors;

146. ## Geometry

A cylindrical flower pot with an open top needs to be painted. The height of the pot is 9 inches and the radius is 3 inches. If it takes Troy 5 minutes to paint 40 square inches, how long to the minute will it take him to paint the outside of the flower

147. ## Math

Josh has 15 sports cards. He has 3 more baseball cards than basketball cards. How many baseball cards does he have?

148. ## Calculus

Hi, I need someone to double check my answer because it doesn't seem right to me. Find the centroid of the region bounded by y=0 and y = x^2 -2x. I calculated the area to be 4/3 and centroid (1, 0.4)... is that correct? Thanks in advance!

149. ## College Math

In Exercises 63–68, determine the length of the sides and the measures of the angles for the congruent quadrilaterals ABCD and A′B′C′D'...BCD

150. ## Math

State the area, A, of the bottom of the box in terms of x. length = 8.5 inches width = 11 inches

151. ## math

factor the expression below using the greatest common facror 12n^5 + 8n^3 +6n

152. ## math

What are the corner points for the feasible region given on the right? gg

153. ## nurse entrance test

After deducting 16 and 2/3 percent the price of a blouse is \$35.00. The list price is what? Is it 42.00 for the list price?

154. ## Geometry

find the surface area of a right cylinder with a diameter of 4cm and a height of 6cm. Round to the nearest hundredth. Book answer is 100.53cm^2 I came up with 150.79cm^2 my work: 2rr(4)6)=150.79cm^2 What did I do wrong??

155. ## math

The constraints [x >= 0,y >= 0] indicates that the feasible region will be in the first quadrant. it is true or false

156. ## History

how did the Nazi-soviet non-agression pact lead to the war in europe and asia?

157. ## MATH

In right triangle ABC below, what is the sine of

158. ## Math

In a fish tank, there are two fewer blue fish than three times the number of yellow fish. If there are 10 blue fish, what is the number of yellow fish(n). Write an equation to solve for n.

159. ## science

I boiled eggs in organce and apple juice to see if the eggs would boil. The eggs boiled. I didn't think the eggs would boil because of the acidity in the orange and apple juice. I got B- on my sciene project. My science teacher wants for me to improve my

160. ## math

An airplane rises vertically 1000 feet over a horizontal distance of 1 mile. What is the angle of elevation of the airplane's path? (hint: 1 mile = 5280 feet)

161. ## Social Studies

We need a copy of Florida studies weekly for the current week we are in. Student copy do you have any idea how we can get access of that electronically

162. ## physics

A patient of mass 75kg sits in a wheelchair of mass 30kg. What is the force needed to push both up a 30 degree slope? If the carer stops on the 30 degree slope and applies the brake, what is the magnitude and direction of the frictional force preventing

163. ## algebra

sean has \$86 to spend. he can spend all of it on one cd and two dvd's, or he can buy two cd's and one dvd and have \$16 left over. what is the price of a cd? of a dvd?

164. ## Math

Select a variable (mean or proportion) of interest to you and collect or find the data. BEFORE you collect the data, decide what a likely mean or proportion might be. Then address the following (and a little more) in your project. a. Write a brief

165. ## math

A factory needs two raw materials, say, A and B. The probability of having an adequate supply of material A is 0.94, whereas the probability of having an adequate supply of material B is 0.96. A study shows that the probability of a shortage of both A and

166. ## Physics

a man jumps off a bridge to see how high it is. he measures his time of descent. he is in the air for 3.0 s before splashing into the water below. a. How high is the bridge above the water? b. How fast is the man going as he hits the water?

167. ## English

Can you please see if everything is correct? Thank you. 1) She said she couldn't stand science fiction or documentary films. 2) Peter asked her if she was going to leave for London that weekend. They asked us if we were Italian. 3) Jane asked me if I could

168. ## Science Please someone help

Using electronic arguments, explain why the alpha-hydrogens of carbonyl compounds are considered to be "acidic hydrogens."

169. ## Physics

A small boy is flipping a piece of cake across the lunch room at school. He uses a fork as a catapult by holding the handle on the table and pressing on the back of it with his thumb. Only part of the energy delivered to the fork goes into the accelerating

170. ## College Algebra

If 24% of your monthly pay is withheld for federal income taxes and another 6% is withheld for Social Security, state income tax, and other miscellaneous items, leaving you with \$989.50 a month in take-home pay, then the amount you earned before the

171. ## Alegebra

Solve for x & y: 3X-6Y(-6X+34)=30

172. ## math

two dice are rolled. their sum is recorded. what is the probability that their sum is between five and ten?

173. ## physics

When you stand 200 meters away from a 30 meter tall tree, what angle should it take up on the horizon?

174. ## gym-rights and responsibilities when ending a rel.

what rights and responsibilities do i have when you are a friend of the person whose friendship was ended by their friend

175. ## Accounting

How is a contract penalty recorded for the company that hires a contractor?

176. ## geometry

how many cubes with a side length 5cm do fit in a cube with a side length 20cm?

177. ## math

If the solution to the linear programming problem exists, then it has to be at a corner point.it is true or false?

178. ## math

A stereo system that regularly sells for \$240 goes on sale for \$192 what is the percent discount From jumpstart booklet grade 8

179. ## English

I urgently need to know a good site where to find reading comprehensions at a pre-intermediate, intermediate level to be set as part of a one-hour English test. I still have some doubts about a few sentences I need to check. I hope you can clarify them.

180. ## American kitchen technology in the 1950s

Do you know of any websites that talk about new cooking technology inventions that were created/ starting to be used in the 1950s? Thanks:)

181. ## math

write three 9s with a division sign and an addition sign to make a value of 10

182. ## Math

A vendor has 14 hellium ballons for sale: 9 are yellow, 3 are red, and 2 are green. A ballon is selcted at random and sold. If the ballon sold is yellow, what is the probablity that the next ballon selected at random, is also yellow?

183. ## math

Which type of graph would be most appropriate to show the students in the debate club, the computer club and the ecology club and the students who are in more than one of these clubs? A bar graph, line graph, Bennett diagram, or a circle graph? Is it a

184. ## math

From the top of a lighthouse 210 feet high, the angle if depression to a boat is 27 degress. Find the distance from the boat to the food of the lighthouse. The lighthouse was built at sea level.

185. ## statistics

Find the area between x = 9.5 and x = 23 under a normal distribution curve with μ = 20 and σ = 4 .

186. ## Physics

A car with a mass of 890 kg travels at a speed of 20.0 m/s. Seeing that the road ahead is blocked by a rock slide, the driver applies the brakes, stopping the car. The work of stopping the car becomes thermal energy of the car’s four disk brake rotors;

187. ## math

scott bought two items at daves fruit market. the cashier told him that he owed \$5.49. why is the cashier incorrect? what did scott purchase? DAVE'S FRUIT MARKET grapes \$2.25/bag bananas \$ 1.99/bag strwberries \$3.40/box watermelon \$5.00

188. ## Essay evaluation

Please grade my GMAT essay on 6 The author of the statement believes that the century old practice of using money in its physical form should be replaced by electronic accounts of credits and debits. Some people may argue that this practice is elitist and

189. ## maths

a worker dig a ditch with perpendicular sides.It is 1.05m wide at the top and at the bottom. If it is 1.80m deep and 21.6m long.How many cubic metres of earth are removed?[give your answer to 1 decimal place.]

190. ## Maths

Sketch the graph of each function below and give the domain and range for : 1. f(x)= ( x-1)to the power of two minus 2.

191. ## MATH

1.Isoscles obtuse triangle TRI with vertex angle T. 2.Rhombus RHOM with acute

192. ## math

calculate the effective yield, then rank them from highest yield to lowest yield: 12% compound annually 11.8% compound quarterly 11.9% compound semiannually

If Y varies inversely as X^2, determine what Y would be if X = 2 and another point on the equation is (1,8).

194. ## physics

If a coffee can has a radius of 63.0 cm and a height of 15.8 cm find its volume round to neaerest cm3

195. ## problem solving

if a circuit has a3.9k resistor and a5uf capacitor, find the current flow in the circuit at 0.005 seconds, if the maximum current flow in the circuit is 105mA

196. ## Pre-Calculus

Let F1 = 219.5, F2 = 447.3, θ1 = 52.79◦, θ2 = 7.831◦. Find the magnitude of the resultant F1 _\|_ θ1 (in quadrant 3 positive) | F2 _|/_ θ2 (in quadrant 1 positive) | I know this is probably hard to understand but I cannot draw diagrams on here

197. ## English macbeth act 2

hey can you provide me with a couple of MCQ for macbeth act 2, and does anyone know the images and mood in each scene of act 2.. plz i need to know because i have a test and i have no clue about the things listed above thanks!

198. ## math

calculate the effective yield, then rank them from highest yield to lowest yield: 12% compound annually 11.8% compound quarterly 11.9% compound semiannually 11.7% compound daily

199. ## Calculus

Hey, we covered limits at the beginning of the year, but I cannot remember how to do them at all. >>>what is the limit, as x approaches 2, of ((1/x )-(1/2))/(x-2)? Please go step by step!

200. ## chemistry

how many mL of 0.50 M ammonia would be needed to react with 1.0 L of 0.75 M HClO4

201. ## help chem quick question!

I have to find a food label that has horrible chemicals in it (such as dextrose). I am supposed to find 2 food lables with the nastiest labels.? What foods would be a good choice?

202. ## English

I forgot to include the following sentences. I really hope you can have a look at them, too. 1) But I heard his voice, which sounded very low. I couldn't see his face because he escaped very quickly. 2) The only thing I remember is that is was carrying

203. ## math

What two numbers are we ? Our quotient is 19 and our sum is 100.

204. ## math

Look at this trinomial 32a^4 + 18a^3 - 12a Write the polynomial as the product of the GCF of all its terms and a polynomial PLEase explain thanks

205. ## calculus

Please help with this very complicated question! Using 3(x-3)(x^2-6x+23)^1/2, as the chain rule fifferentiation of f(x)=(x^2-6x+23). Please explain how I find the general solution to dy/dx= 2/27(x-3)SQUARE ROOT BEGINS (x^2-6x+23)/y SQUARE ROOT ENDS (y>0),

206. ## statistics

Let x be a continuous random variable that is normally distributed with a mean of 65 and a standard deviation of 15. Find the probability that x assumes a value less than 44.

207. ## statistics

Let x be a continuous random variable that is normally distributed with a mean of 65 and a standard deviation of 15. Find the probability that x assumes a value less than 45.

208. ## statistics

Let x be a continuous random variable that is normally distributed with a mean of 24 and a standard deviation of 7. Find the probability that x assumes a value between 27.5 and 59.0. Use Table IV in Appendix C to compute the probabilities. Round your

209. ## MATH

A bike club wants to make license plates for bikes. Each license plate has a letter followed by a digit. How many different license plates can be made?

210. ## Chemistry

Determine whether the following reaction is endothermic or exothermic: Mg(g) + 2 F (g)--> Mg 2+(g) + 2 F- Mg: I1= 738 kJ/mol I2= 1451 kJ/mol F: EA= -328 kJ/mol

211. ## Prep chem

A gas occupies 30L at 25 celsius. What volume will it occupy at 200 celsius at the same pressure?

212. ## Calculus

I need to find the second derivative of y=x(x-1)^1/2. I found the first derivative is 2x-1/2(x-1)^1/2, if someone could check, but I am miserably stuck on the second derivative.

213. ## English

what is the simple predicate in the sentence, I could hear the wind blow through.

214. ## English

I forgot to include the following sentences. Thank you very much for your help. 6) "Anything could happen while we are out there", says Simon. "We might have an incident and injure ourselves, our motorbiles may break down, so we have decided that we need a

215. ## chemistry

4. How would you convert 9.0 grams of water to moles?

216. ## chemistry

5. What is the conversion factor that you would want to use to convert 2.0 moles of NaCl into grams?

217. ## grammar

What is the sentence structure, purpose and pattern of this sentence?? My dog, Ben likes to chase cats and birds.

218. ## math

How do you find one fourth or two thirds?

219. ## geometry

Two sides of a triangle measure 8 and 15. How many integer values can be assigned to the third side so that all the angles in the triangle are acute?

220. ## gym-rights and responsibilities when ending a rel.

what rights do you have when ending a friendship or relationship? what rights and responsibilities do you have when you are the person who has had the friendship or relationship ended by the other person?

221. ## Math

The radius of a disk grows at 2cm/s. Calculate the growth rate of the disks area when the radius mesures 7 cm. (Designate the area of the disk with A and the radius with r) A) Find the relation between A and r B) Find the derivative of this relation on

222. ## Algebra II

find Sn for geometric sequence with a1 = 8, n = 9, and r = -1? Sn = a1(1-r ^n) / (1-r) = 8(1-1)/(1+1) = 8(0)/2 = 0 is this correct..?

223. ## English

Whast is the full meaning of APA Style?

224. ## math

hello i need help with system of equations theres 3 only thank you 2x+3y-17 3x+y=31 2(x-3y)=24 y=3x-2 2(x+4)=24 x+y=17

225. ## math

When graph a linear inequality, we use solid line if the sign of inequality is < or >.it is true or false

226. ## math

a cross section of a hollow circular pipe shows that its inner diameter is 2 1/10inches and that the pipe is 3/5inch thick. what is the outside diameter

227. ## Social Sciences

I have to present a bill of why prostitution should be legalized in the U.S. in school and was wondering if anyone has some fun or interesting ideas to really get the class interested in my topic. I really don't want to blend in with the same old

228. ## math

hello i need help with system of equations theres 3 only thank you 2x+3y-17 3x+y=31 2(x-3y)=24 y=3x-2 2(x+4)=24 x+y=17

229. ## math

In triangle ABC if

If x is 10, is 2/x in proportion to x/50? Why I am not understanding the question very well. Algebra is not easy for me.

231. ## Chem help!!!!

I am supposed to find 2 food labels that have high chemicals in them. This is the instructions he gave us: Highlight all CHEMICAL names on the label (DO NOT COUNT wheat, flour, sugar, salt, oils, salt, etc) (however dextrose would count) please help me

232. ## need alot of help please math

hello i need help with system of equations theres 3 only thank you 2x+3y-17 3x+y=31 2(x-3y)=24 y=3x-2 2(x+4)=24 x+y=17

233. ## math

Help me calculate 6 - 3/4 And place in order greatest to least 1/3, 4/9, 3/4, 5/6, 5/8, 2/3 3/12, 2/5

Find the sum of the angle in each regular polygon. (Pentagon)

Should old growth trees be cut down and used or preserved? The only thing I know is that they grow in the Coastal forest region. The coastal forest region has both old growth and new growth stands of trees. The old growth trees are optimum for use in the

236. ## Algerbra

3(y-3)=(x+6)squared how do you find the vertex and foci,directrix

237. ## Public and Private schools

Could I know the difference between these two schools. I go to a public school so Im not sure what a private school is. All that I do know is that the students learn about religion more. Also should all the schools be fully funded by the Ministry of

238. ## science

i need help on " define upwelling and explain its importance"

239. ## calculus

Determine the exact value for the constant k such that the area of the region bounded by the curves y=x and y=kx^2 is equal to 2/3 sq units. Any help is appreciated.

240. ## French

What does this phrase mean? Puis, pendant le voyage je vais ecouter vos histoires une par une. Then, during the trip I am going to listen to your stories one by one. Is my translation correct?

241. ## CHEMISTRY

What is the meaning of negative couplage in NMR

242. ## american government

• What factors make it more likely that a bill will become law? What factors make it less likely?

243. ## algebra

v^6-64 factor

244. ## math

(B-C)^2=(C-B)^2 ,where B and C are (n x n) matrices.what is the answer, it is true or false

245. ## math

In triangle ABC if

246. ## trig

simplify the expression sin(theta+pi/4) + sin(theta-pi/4)

247. ## math

find x for a triangle that has 100 degrees and 47 degrees.

248. ## math

If you were standing in the back of a truck moving at 70 mph, and you threw a baseball in the opposite direction at 50 mph, would it come back and hit you? I think it would.

249. ## MATH

In right triangle ABC below, what is the sine of

250. ## arithmetic

using 1,2,6,7 and arithmetical symbols make equation to get 33 as answer

251. ## history

To what extent and in what ways did the great depression and the new deal alter americans perception of the legitimate role of government in the economic and social life of the united states?

252. ## mechanics

a particle is moving with a velocity of 6m/s when subjected to an accelaration of -3m/s for 4 seconds.it then moves with a constant velocity for 2 seconds.draw a velocity-time graph.

253. ## Math

If the area of a square is 36 sq. Ft., explain how you could find the perimeter.

254. ## ethics

Does the principle "the end justifies the means" hold true under each the three major ethical theories? Why or why not.

255. ## college math

is 3/11=7/19 a proportional fraction

256. ## us history

Explain why the U.S. supported a policy of the open door?

257. ## Medical Coding/Billing

how are E and V codes used in an inpatient and outpatient setting

258. ## math

hello i need help with system of equations theres 3 only thank you 2x+3y-17 3x+y=31 2(x-3y)=24 y=3x-2 2(x+4)=24 x+y=17

259. ## science

students can use any of the items above to build an electromagent. which item is NOT needed to build an electromagent?

260. ## english

I need 10 questions of how to prevent/help children from performing violent actions towards others at school

261. ## Pre-Calculus Vectors

Let u = 2i − j, v = −i + j. Find 2u - 3v.

262. ## ART

What is decoupage? i don't understand.

263. ## math

Monday=6 Wednesday=9, and Saturday = 8. Find the sum of the values of all 7 days of the week.

264. ## Political Science

If America were to propose an amendment allowing children to be represented as voters through their guardian or parent do you think this is a good thing? For example, a parent of a young child will give two votes, one for themselves and then other on their

266. ## physical science

which of the following statements concerning air resitance is false? a. skydiverscan influence their speed by changing thier body positioning b. objects that fall together in a vaccum may fall at differnt speeds in air. c. it is easier for a pitcher to

267. ## English

I urgently need you to revise these questions as a post-reading activity. Can you please check the questions? 1) Jamal is planning a trip around the world on his motorbike with his friend Simon. Possible question: Is Jammal travelling alone/on his own? 2)

268. ## Algebra II

find Sn for geometric sequence with A1 = 8, n = 9, and r = -1 Sn = A1 = 8, n = 9 and r = -1 Sn = A1(1-r^n) / 1-r = 8(1 - 1^-1)/(1-(-1)) = 8(0)/2 = 0 is this right ?

269. ## Math

Lawrence records the number of minutes he reads each day show below Day 1: 75 mins Day 2: 30 mins Day 3: 25 mins Day 4: 50 mins Day 5: 80 mins How many minutes must Lawrence read on the sixth dat of have mean of 55 minutes read for the 6 day?

270. ## math

what is x^3= .0013071??

271. ## Private Enterprise

Could I please know what this means?

272. ## math

How many dates in 2011 are a multiple of 10? (A date in the case is a month and day, such as May 20.)

273. ## history

Reasons for casualties in the civil war?

274. ## math

how do i solve the problem of _____________________________ 0 14 20 i have to find out what the percentage is

275. ## science

How much water should be added to 55.0 mL of 0.201 M HCl to dilute the solution to 0.155 M?