Questions Asked on
April 19, 2010

  1. Algebra

    THe function h(t)=-16t^2+v0t+h0 describes the height in feet above the ground h(t) of an object thrown vertically from a height of h0 feet, with an initial velocity of v0 feet per second, if there is no air friction and t is the time in seconds sine the

    asked by Joe
  2. Chemistry- Empirical Formula

    Aniline, consists of C, H, and N. Combustion of such compounds yields CO2, H2O, and N2. If the combustion of 9.71 mg of aniline yields 6.63 mg H2O and 1.46 mb N2, what is the empirical formula? What is the molecular formula of a compound with the molecular

    asked by Akira
  3. physics help

    Imagine you are in an open field where two loudspeakers are set up and connected to the same amplifier so that they emit sound waves in phase at 688 Hz. Take the speed of sound in air to be 344 m/s. If you are 3.00m from speaker A directly to your right

    asked by Anonymous
  4. physics

    A piano tuner stretches a steel piano wire with a tension of 765 N. The steel wire has a length of 0.400 m and a mass of 3.00 g. What is the frequency f_1 of the string's fundamental mode of vibration? What is the number of the highest harmonic that could

    asked by Anonymous
  5. chemistry

    What pH is needed to produce this value of Q if the concentration and pressure values are. Q= 1.38*10^-26 Br2=2.50*10^-4M Br-=12.10M SO4^2-=8.75M Pso2=1.50*10^-5

    asked by Sanaa
  6. Physics

    An ice cube having a mass of 50 g and an initial temperature of -20⁰C is place in 400 g of water 30⁰C water. What is the final temperature of the mixture if the effects of the container can be neglected?

    asked by Nina
  7. gen chemistry

    Which type of bonding does Sr form upon solidification?

    asked by ada
  8. chemistry

    When 25.0 g of Zn reacts, how many L of H2 gas are formed at 25 °C and a pressure of 854 mmHg?

    asked by kellie
  9. trig

    Verify the identity sin 3x cos 3x = 1/2 sin 6x can you show step by step please

    asked by Ali
  10. statistics

    In a particular hospital, newborn babies were delivered yesterday. Here are their weights (in ounces): 106 104 96 123 116 Assuming that these weights constitute an entire population, find the standard deviation of the population. Round your answer to at

    asked by Nathan
  11. English

    Identify the correctly punctuated sentence below. Janet entered the abandoned mountain monastery she noticed the moss-covered rocks below. Janet entered the abandoned mountain monastery, she noticed the moss-covered rocks below. Before entering the

    asked by christopher
  12. Voltage

    If a transformer has 3,000 loops in its primary coil and 1,500 loops in its secondary coil, how do I find the voltage in the secondary coil if the voltage in the primary coil is 120V? Is there a formula? HELP, please!

    asked by Lynda
  13. PHYS 101

    Determine the volume of 200g of carbon tetrachloride,for wich specific gravity is 1.6

    asked by KABELO
  14. gen chemistry

    Which of the following compounds has the highest boiling point? HI H2Te H2O AsH3

    asked by ada
  15. Gen Chem

    Barium has a radius of 224 pm and crystallizes in a body-centered cubic structure. What is the edge length of the unit cell?

    asked by gagaga
  16. Gen chemistry

    In liquid propanol, CH3CH2CH2OH which intermolecular forces are present? a)Only dispersion and dipole-dipole forces are present. b)Dispersion, hydrogen bonding and dipole-dipole forces are present. c)Only hydrogen bonding forces are present. d)Only

    asked by ada
  17. Trigonometry

    Gabe is spending two weeks on an archaeological dig. He finds a fragment of a circular plate that his leader thinks may be valuable. The arc length of the fragment is about 1/6 the circumference of the original complete plate and measures 1.65 inches. A

    asked by Anonymous
  18. french

    Can someone please proofread my paragraph? I already edited it as much as I could. Thanks! Notre classe de français vient d'aller au zoo de San Francisco lundi dernier. Je suis arrivée à l'école à sept heures trente-sept. Quand la cloche a sonné, je

    asked by amanda
  19. Organic Chem

    Rank these conformational isomers in order of decreasing potential energy? Highest on the left and lowest on the right. To rank items as equivalent, overlap them. Here is a link to the picture of the problem: ht+tp+:/+/bit+.ly/+8ZHeDA Remove the '+' sign

    asked by Random User
  20. Gen Chemistry

    What is the coordination number of the Fe atom in K3[Fe(C2O4)3]? is it 6?

    asked by gagaga
  21. chemistry

    N2H4 reacts with oxygen to yield nitrogen gas and water . The reaction of 3.80g n2h4 evolves 73.7kj of heat. what's the enthalpy change per mole of hydrazine combusted.

    asked by olexandra
  22. Chemistry - Balancing Equations

    Balance the following: Ca(OH) + H2SO4 -----> CaSO4 + H2O Na2S2O3 + I2 -----> 2NaI + Na2S4O6 ZnCl + Na2S -----> ZnS + NaCl SnCl4 + H2O ----> SiO2 + 4HCl I figured out the 2nd and 4th one to be: 2Na2S2O3 + I2 -----> 2NaI + Na2S4O6 SnCl4 + 2H2O -----> SiO2 +

    asked by Akira
  23. physics

    Please, anyone help me please. Q: An object is placed 17.8 cm from a first converging lens of focal length 13 cm. A second converging lens with focal length 24 cm is placed 10 cm to the right of the first converging lens. (Take the direction to the right

    asked by Chan
  24. PHYS101

    oil is added to the right hand arm of a U-tube containing water.The oil floats above the water to a height of h=10cm.The top of the oil+water column is a height d=2cm above the top of the water column in the other arm .Calculate the oil density?

    asked by KABELO
  25. 4th grade

    Franca travelled 6.8km from one town to another town. where might have franca travelled?

    asked by Anes
  26. phys101

    a hydraulic press contains oil of density=800kg/meter cube,and the areas of the large cylinder=0.5meter squad and area of small cylinder=0.0001meter squad.the mass of the large piston is 51kg,while the small piston has unknown mass m.If an additonal mass

    asked by KABELO
  27. Trig

    Virgil sets his boat on a 1000-yard course keeping a constant distance from a rocky outcrop. If Virgil keeps a distance of 200 yards, through what angle does he travel? If Virgil keeps a distance of 500 yards, what fraction of the circumference of a circle

    asked by Anonymous
  28. S.S

    Was Kublai Khan esteemed by his subjects?

    asked by Evie
  29. Physics

    where should an object be placed in front of a concave mirror so that it produces an image at the same location as the object? Is the image real or virtual? Is the image inverted or upright ?

    asked by ESMERALDA
  30. chemistry

    At 1285 degree C the equilibrium constant for the reactin Br2(g) 2Br(g) is Keq= 1.04 * 10^-3. A 0.200 L vessel containing an equilibrium mixture of the gases has 0.245 Br2(g) in it. What is the mass of Br(g) in the vessel? Please help, Thanks!!

    asked by Peter
  31. Math

    What are the advantages and disadvantages of grouped data?

    asked by Yolanda
  32. PHYSICS

    A circular curve of highway with radius 200m is designed for traffic moving at 100km/h, and is banked so that cars can make the curve even without friction at that speed. What is the correct angle of banking for this curve? Show steps, please.

    asked by Joey
  33. chemistry

    how would you go about calculating the change in H' of the reaction 2N2O 4NO2+O2 if you are given the H'of formation for N2O and NO2 but not the H' of formation for O2? is H' of O2 zero? if so why? and also how can you tell to use change in S'=sum(npS'p) -

    asked by john
  34. Chemistry

    A popular brand of automobile radiator antifreeze advertises that their product (ethylene glycol; C2H6O2) provides engine protection from temperatures of -64C to 135C when mixed with water in a 50%/50% mix. What is the boiling point elevation and freezing

    asked by Angelica
  35. algebra

    (x^2-25/2x^2+5x-12)/(x^2-3x-10/x^2+9x+20)

    asked by frances
  36. Statistics... I need help

    . Assume that a set of test scores is normally distributed with a mean of 100 and a standard deviation of 20. Use the 68-95-99.7 rule to find the following quantities: (Hint: Make a drawing and label first) a. Percentage of scores less than 100 b. Relative

    asked by Adam
  37. calculus

    A uniform thin sheet of metal is cut in the shape of a semicircle of radius R and lies in the xy plane with its center at the origin and diameter lying along the x axis. Find the position of the Center of Mass using polar coordinates.

    asked by Jacob
  38. chemistry

    According to reference table G,which substance forms an unsaturated solution when 80 grams of the substance is dissolved in 100grams of hydrogen 2 oxygen at 10 degrees celsius?

    asked by felisha
  39. chemistry

    A student weighed out 1.5g of salicylic acid into a flask and then added 4ml of acetic an hydride to react. He also added 5 drops of concentrated sulfuric acid. Density of acetic an hydride is 1.08g/ml and sulfuric acid is 1.85g/ml (sulfuric acid is a

    asked by Anonymous
  40. Asia

    During British rule, the Indian textile industry was almost wiped out because

    asked by Anonymous
  41. statistics

    A used car dealership has found that the length of time before a major repair is required on the cars it sells is normally distributed with a mean of 10 months and a standard deviation of 3 months. If the dealer wants only 5 percent of the cars to fail

    asked by victoria
  42. economics

    Given the business situation of Mrs. Acres Homemade Pies (p. 30) and using the economic concepts of supply and demand, explain 1) Discuss what you think will happen to the supply, demand and price of the product in the short-term; 2) Discuss what you think

    asked by cindy
  43. 5th grade math

    two numbers are reciprocals of each other and one of them is four times as large as the other. what are the two numbers?

    asked by alex
  44. chemistry

    Calculate the energy that must be removed to convert substance X from a gas at 115°C to a solid -50.7°C. Assume X has a molar mass of 75.0 g/mol. Specific heat capacities ΔHvap 20. kJ/mol C(s) 3.0 J/g · °C ΔHfus 5.0 kJ/mol C(l) 2.5 J/g · °C bp

    asked by Trish
  45. acc

    Case 9-2 Purchase of Assets On October 10, 2005, Mason Engineering Company completed negotiations on a contract for the purchase of new equipment. Under the terms of the agreement, the equipment may be purchased now or Mason may wait until January 10,

    asked by Anonymous
  46. Ions & Atoms-Lab Part 2

    For those who haven't seen my previous post; I request you to go and search for it, it says Lab part 1 on it. You will not know what I'm asking about, if you don't read it it. Overall nothing will make sense. Thank you very much for all your help. These

    asked by Sara
  47. globel

    How did geography both help and hinder Allied advances

    asked by christina
  48. math

    solve the initial value problems: 1- dq/dz = 2 + sinz, q(0)=5 2-dy/dx = (x^2 -2)x, y(2)=4 3-dy/dx = 4e^5^x + x, y(0)=4 4- dy/dx 3x + 2, y(3)= 2

    asked by piper
  49. math

    Suppose a rectangular box with 3cm height, 2cm width, and 5cm length was resting on a different face. How would this affect its surface area?

    asked by Evie
  50. math

    least common denominator of (x^5/x^2 6x 9) and (5/x^2 5x 6)

    asked by Anonymous
  51. Math

    The function of g += t^2-t represents the total number of games played by t teams in a sports league in which each team plays each of the other teams twice. The Metro League plays a total of 132 games. How many teams are in the league?

    asked by Macy
  52. chemistry

    what volume of carbon dixoide (CO2) will be produced if 2.90 moles of iron (Fe) is produced

    asked by Bianca
  53. Algebra

    THe function h(t)=-16t^2+v0t+h0 describes the height in feet above the ground h(t) of an object thrown vertically from a height of h0 feet, with an initial velocity of v0 feet per second, if there is no air friction and t is the time in seconds sine the

    asked by Joe
  54. physical science

    filtration can be used to separate mixutures based on?

    asked by nita
  55. Physics

    You have arranged that the magnetic field in a particular region of space is due North with a value of 0.009 T. An electron enters the field traveling to the west with a speed of 0.09 of the speed of light. As a result, the electron experiences a magnetic

    asked by Steve
  56. Science

    A chemist weighed out 5.16 g of a mixture containing unknown amunts of BaO(s) and CaO(s) and placed the sample in a 1.50-L flask containing CO2(g) at 30.0°C and 750. torr. After the reaction to form BaCO3(s) and CaCO3(s) was completed, the pressure of

    asked by Genn
  57. HCA/220

    Summarize the process of blood clotting, immune response, allergic reaction, and hormone release and how they interrelate. I know they all seam to have to travel through the blood somehow but I can't put it all together.

    asked by Bren
  58. chemistry

    how many moles of carbon dioxide will be produced when 2.8 moles of oxygen react (consider the combustion of ethylene: C2H4 + 3 Oxygen2 -->2CO2 +2H2Oxygen

    asked by llo
  59. physics

    A person walks 5 meters in the direction 370 degrees north of east. How far from north and how far east had he walked? what is the answer of this question?

    asked by asraf
  60. Chem

    Is this correct NO2 + H2O ---> NO3 + H2 and is it hazardous

    asked by Pierre
  61. Algebra

    Simplify the expression (x(3/2)^(4/3)(√x)/x)

    asked by Ray
  62. chemistry

    the solubility of MG(OH)2 is 0.61 g/L What must be the PH of this solution. and thx dr. bob for last question

    asked by anonymous
  63. College Algebra

    I'm supposed to find a polynomial with specified Zeros. This is all the question told me: Degree: 4 Zeros: -2, 0, 2, 4 I know how to do these problems when it's a degree of 3, but not 4.

    asked by Ashley
  64. american history

    How did the Woodfrow Wilson's reform platform during the 1912 campaign differ from that of Theodore Roosevelt?

    asked by Sally
  65. chemical

    how to obtain the kinetic data for this reaction 2NO3+2H2>2H2O+N2 HOW TO PERFORM THIS REACTION IN LAB.

    asked by assia
  66. earth

    how would eath's gravity effect you in space??? At what altitude does the Earth's gravity no longer have an effect on the astronauts or the space shuttle???

    asked by kelle
  67. math

    write the value of the 7 in each number: 127 473

    asked by natalie
  68. algebra

    solving quadratics

    asked by bri
  69. English

    1.Which sentence below contains a dangling modifier? 1. I threw the newspaper in the waste basket after I read the editorial. After I read the editorial, I threw the paper away. After reading the editorial, I placed the newspaper in the waste basket. After

    asked by christopher
  70. math

    Evaluate f(x)= 4x^2 - 2 for f(1/2)

    asked by Jeff
  71. Statistics

    1. Which of the following statements are correct? a. A normal distribution is any distribution that is not unusual. b. The graph of a normal distribution is bell-shaped. c. If a population has a normal distribution, the mean and the median are not equal.

    asked by Jackie
  72. Calculus

    Need an answer to this Calculus Question. I keep getting this type of question wrong. Thanks. Differentiate the Function: y = (3x-1)^2(2-x^4)^2 y =

    asked by Dave
  73. Statistics

    Assume the body temperatures of healthy adults are normally distributed with a mean of 98.20 °F and a standard deviation of 0.62 °F (based on data from the University of Maryland researchers). a. If you have a body temperature of 99.00 °F, what is your

    asked by Sasha
  74. English

    Thank you very much for your last corrections. I forgot to include a few other sentences I’m still not sure of. 1)Queen Victoria’s reign has been one of the most flourishing (?) in Great Britain’s history. She reigned constitutionally and avoided the

    asked by Franco
  75. chemistry

    does any one know how to write cis-2,3-dibromo-2-hexene formula? Please help!

    asked by Uli
  76. physics

    To tighten a bolt, you push with a force of 90 N at the end of a wrench handle that is 0.45 m from the axis of the bolt. (a) What torque are you exerting? Enter a number. 1 N·m (b) If you move your hand inward to be only 0.15 m from the bolt, what force

    asked by Anonymous
  77. math

    the perimeter of a triangle is 195mm if the length of the sides are consecutive odd integers. what is the length of each side?

    asked by patricia
  78. 5th grade

    solve 3 gal 3 qt = _____ qt

    asked by Connie
  79. English

    1. When was Wima born? - She was born in 1940. 2. How many miles was the hospital away from Wilma's home? - It was about 50 miles away from her home. 3. When did Wilma get a bronze medal at the Melbourn Olympics? - She got a bronze medal in 1956. 4. When

    asked by rfvv
  80. Chemistry

    Some polymers are flexible when pulled one way but not another(example:milkbags). Can someone please explain why this happens?

    asked by lala
  81. chemistry

    What is plastic #7 used for? How is it related to cancer?

    asked by sel
  82. social studies

    What is the difference between high and low pressure systems and what weather does each bring?

    asked by Chloe
  83. math

    19 < - x

    asked by linda
  84. economics

    How is the demand curve for an item that is very responsive to price changes likely to be different from that of an item whose demand is not very responsive?

    asked by kevin
  85. English

    the plot of strange objects by gary crew

    asked by Jade
  86. 4th grade

    You are playing a card game with a full deck of 52 cards. You win if you draw a red card thatk is a multiple of 5. What are your chances of winning on your first draw?

    asked by Alisha
  87. religion

    what are major similarities and differences among the different religious groups like Atheist, Buddhist Baptist, Catholic, Protestant, Methodist, Hindu, Islam, Jehovah's Witnesses, Mormon Sikh Judaism

    asked by Greg
  88. english 3

    hi how do i like compare and contrast these two realist stories a good man is hard to find by flannery O'Connor and a pair of silk stockings by Kate Chopin

    asked by sara
  89. PHYS101

    For a system,the cylinder on the left,at L,has a mass of 600kg and a cross-sectional area of 800centi meter squad.The piston on the right,at S,has cross-sectional area 25centi meter squad abd negligible weight.If the apparatus is filled with

    asked by KABELO
  90. apchem PLease Answer

    What is the equation for HOCl dissolves in HOH? I don't get it...

    asked by Kiki
  91. Math

    If you ordered two pizzas for dinner Friday. Date ate 3/4 of one pizza, Jenny ate 1/8 of a pizza, Danny ate 1/4 of a pizza, and Mom ate 1/2 of a pizza. What fraction of a pizza was left for a midnight snack?

    asked by Tysheera
  92. English

    What is a verb form ending with -ing called? 1. gerund infinitive possessive passive Question 2 A verb form that begins with to is called what? gerund infinitive possessive passive Question 3 Which sentence is in the correct form? She began to sing the

    asked by christopher
  93. PHYS101

    A VENTURI TUBE IS USED TO MEASURE THE WATER SPEED V IN A PIPE BY COMPARING THE WATER PRESSURE IN THE WIDE AND NARROW SECTIONS(CROSS-SECTIONAL AREAS A, A=A/4).FIND V IF THE DIFFERENCE IN MECURY LEVEL IS h=25mm.(THE DENSITY OF MERCURY IS =13600Kg/meter cube)

    asked by KABELO
  94. finance

    How much would I have to put away annually to accumulate 50,000 in 8 years given an investment of 10% compounding savings?

    asked by maria
  95. Math

    Leah liked to balance objects she found around the house using the science kit she got for Christmas. She found that 3 identical apples and a 5-gram weight exactly balanced a 50-gram weight. Leah said she could tell how much each apple weighed by solving

    asked by Ariana
  96. PHYS101

    A VENTURI TUBE IS USED TO MEASURE THE WATER SPEED V IN A PIPE BY COMPARING THE WATER PRESSURE IN THE WIDE AND NARROW SECTIONS(CROSS-SECTIONAL AREAS A, A=A/4).FIND V IF THE DIFFERENCE IN MECURY LEVEL IS h=25mm.(THE DENSITY OF MERCURY IS =13600Kg/meter cube)

    asked by KABELO
  97. Grammar and Composition

    Hi, I'm working on my Learning Log of Vocabulary Words, and there are two words that I can't find sentences for abnegate, and abode Can someone please help me with these? Thank you!

    asked by y912f
  98. Math

    Solve the pairs of simultaneous equations by the substitution method. 5x-9y=17 3x-8y=5

    asked by Gilda
  99. phys101

    a homeowner wishes to drain her swimming pool by siphoning the water,whose depth is h,into a nearby gully a distance H below it,where H is much larger than h.She uses a pipe of cross-sectional areea a,and the pool has surface area A.How long does it take

    asked by KABELO
  100. math

    Marissa plans to cut a wire that is 5 feet 3 inches long. How long should each of the cut pieces be if she wants 7 equal pieces of wire? Find the twenty-second term of an arithmetic sequence if the first term is 4 and the common difference is 10. Find the

    asked by joe
  101. Chemistry

    what mass of acetylene, will be produced from the reaction of 90g of calcium carbide, with water inthe following reaction CaC2+2H2O-C2H2+Ca(OH)2

    asked by Kiara
  102. Maths

    I'm really struggling with word problems right now. Got through 20 just three left. Can someone please give me some pointers or the first few steps? 1. A sum of money is divided between A, B and C in the ratio 1 : 2 : 3. However, before the money is

    asked by Sindy
  103. apchemistry

    How do you seprate a homogenous mixtre of 2 volatile liquids?

    asked by Kiki
  104. physics

    A fisherman's scale stretches 3.5 cm when a 2.1 kg fish hangs from it. What is the spring stiffness constant?

    asked by Anonymous
  105. Chemistry

    what is the laboratory procedure for separating two volatile liquids?

    asked by Ana
  106. Physics

    How many electrons must be removed from an electrically neutral silver dollar to give it a charge of +2.0 ìC?

    asked by Arnold Manguy
  107. Physics

    A rod has a charge of -2.0 ìC. How many electrons must be removed so that the charge becomes +3.3 ìC

    asked by Arnold Manguy
  108. social studies

    Who was the 30th president?

    asked by Zoei-Lillia
  109. Physics

    Four identical metal objects each carry different charges. The charges are +1.6, +8.2, -4.8, and -9.4 ìC. These objects are brought simultaneously into contact, so that each touches the others. Then they are separated. What is the final charge on each

    asked by Anonymous
  110. perimeters and area

    what is the perimeters of the letters, exp...I,U,J EXPLAIN HOW YOU GET THE PERIMETER OF EACH LETTER....

    asked by yazmin
  111. Physics

    The nucleus of the helium atom contains two protons that are separated by about 3.0 x 10-15 m. Find the magnitude of the electrostatic force that each proton exerts on the other

    asked by Arnold Manguy
  112. art

    Write a summary comparing and contrasting the characteristics of Roman and Greek architecture in 200 to 300 words. Provide examples of architecture from both Greek and Roman culture

    asked by Denise
  113. Enviromental Science

    • Post a 7- to 9-slide (not including title slide or reference slide) PowerPoint® presentation according to the following: List what you think are the best ways to treat each of the following types of solid waste, and explain the benefits of the

    asked by Sheei
  114. algebra 2

    (4xy)^-2

    asked by kiva
  115. Engineering

    ANPR system takes two images of each passing car. each image is 840 pixels wide and 320 pixels high. each pixel is stored in one byte. on average six car pass per minute. if each uncompressed image is sent back to the control centre for processing, what is

    asked by kenji 86
  116. Math

    At Shannons birthday Kira ate 3 pieces, Brazdley ate 2,Shauna ate 4, and Sammi ate 3 pieces of pizza. Now 1/4 of the pizza is left. How many pieces was the pizza originally cut into?

    asked by Ray
  117. Communications

    Good writing costs companies money, and those costs increase significantly if the communication is ineffective. Which of the following pairs would NOT be two additional costs to the company if written communication is poor? A. Computers and software B.

    asked by Anonymous
  118. English

    my new answers 1.After I read the editorial, I threw the paper away. 9.He watched the birds drinking coffee on his porch. 11.An engineer designed that racecar with special headlights. 14.With only $20 in his pocket, the bus for Norfolk seemed the only

    asked by christopher
  119. ECONOMICS

    I need to evaluate the effects of government trade policy on economic behavior. In addition I have to incorporate real world examples in today's economic situation.

    asked by TORI
  120. ap calculus ab

    what is the derivative of y=arccos(4x)/3x

    asked by matthew
  121. algebra

    The costs of doing business for a company can be found by adding fixed costs, such as rent, insurance, and wages, and variable costs, which are the costs to purchase the product you are selling. The portion of the company’s fixed costs allotted to this

    asked by John
  122. ap calculus ab

    what is the derivative of y=arccos(4x)/3x

    asked by matthew
  123. Physics

    Two golf balls of equal size and mass are released simultaneously from the roof of a building. One of the balls has a smooth surface while the other one has grooves on it. They then hit on a hard and horizontal plane on the floor. Assume that the golf

    asked by Eddy
  124. Grammar and Composition

    behind the park there was a stream in which trout abound. Does this sentence make sense for the word abound?

    asked by y912f
  125. physics

    A bungee jumper with mass 63.5 kg jumps from a high bridge. After reaching his lowest point, he oscillates up and down, hitting a low point eight more times in 40.0 s. He finally comes to rest 28.5 m below the level of the bridge. Calculate the spring

    asked by Anonymous
  126. physics

    Damped mass spring system oscillates at 205 Hz. The time constant of the system is 6.6s. At t=0 the amplitude of oscillation is 4.7 cm and the energy of the oscillating system is 26J. What is the amplitude of oscillation at t=9.9s? Answer in units of cm

    asked by eric
  127. Math

    A company purchased an air conditioning system for $10200. The shipping charges on the system were $875, and the setup cost were $1250. The system is expected to last for five years and has a residual value of $2000. If you use the straight-line method to

    asked by Anonymous
  128. Kindergarten Math

    what is counter? My child has to draw a piece of yarn 3 counters long over the top needle, 4 counters long over the middle neddle and 5 counters long over the bottom needle! But I don't know what a counter is!

    asked by VV
  129. 4th grade math

    If you ordered two pizzas for dinner Friday. Dad ate 3/4 of one pizza, Jenny ate 1/8 of a pizza, Danny ate 1/4 of a pizza, and Mom ate 1/2 of a pizza. What fraction of a pizza was left for a midnight snack?

    asked by Michael
  130. life orientation

    provide recommendation how to address the human problem?

    asked by lerato
  131. math

    Mrs Munoz algebra class was collecting money for a party. The class decided that each student should give the same amount of money. They collected a total of $9.61. If everyone used 5 coins, how many nickels were collected?

    asked by jane
  132. medical records

    How does accreditation affect the practical activities of record management in hospitals

    asked by Jake
  133. FCCOLLEGE

    Rashida has a monthly income of $200.which sheallocates between two goods meat and potatoes, (a)suppose meat cost$4 per pound and potatoes cost $2 per pound.drawv her budget constraint. (b)suppose that her utility function is given by the equation

    asked by raeesa javed
  134. Physics Inertia : Merry-go-round

    A playground merry-go-round of radius 1.96 m has a moment of inertia 335 kg m2 and is rotating at 12.3 rev/min. A child with mass 43.1 kg jumps on the edge of the merry-go-round. What is the new moment of inertia of the merry-go-round and child, together?

    asked by HELP ME!!
  135. math

    find the volume of spherical cap

    asked by dinesh
  136. English 2

    In Hamlet, I don't understand what the Queen mean when she says “To my sick soul…/ Each toy seems prologue to some great amiss”?

    asked by Kimberly
  137. math

    find the volume of spherical cap

    asked by dinesh
  138. English

    Creon declares that anarchists are behind the burial of Polyneices. What dramatic irony lies in the declaration?

    asked by Anonymous
  139. Chemistry

    Which of the following has the highest vapor pressure? CCl4 CBr4 CH3CH3 CH3CHBr2

    asked by Tiffany
  140. Physics

    An oxygen molecule consists of two oxygen atoms whose total mass is 5.3 x 10^-26 kg and whose moment of inertia about an axis perpendicular to the line joining the two atoms, midway between them, is 1.9 x 10^-46 kg*m^2. Estimate, from these data, the

    asked by Alley
  141. algebra

    The Two Angles Are Complementary. The Sum Of The Measure Of The First Angle And Half The Second Angle Is 81.5 Degrees. Find The Measures Of The Angles

    asked by Anonymous
  142. chemistry

    what is the molarity of a 50% by mass solution of NaOH id the density of the solution is 1.05 g/ml

    asked by Rob
  143. science

    25 ml sample of 0.150 m solution of aqueous trimethylamine is titrated with 0.100 M soultion of hcl. calculate the pH of the solution after 10.0ml,20 ml and 30.0 ml of acid have been added; pkb of (CH3)3 N =4.19?

    asked by Jake
  144. geometry

    write an expression for the sum of the angle measures in a regular polygan with n sides. then wirte an expression for the measure of each angle in a regular polygan with n sides.

    asked by emily
  145. Chemistry

    In lab we conducted a calorimetry experiment with a peanut. We burned a half a peanut and placed it underneath a pop can with 50mL of water inside. One of our questions is why heat transfer to the pop can isn't accounted for when calculating heat generated

    asked by Anonymous
  146. College Physics

    A raft is made of wood with a density of 404 kg/m^3. It is 42 cm thick and its square area is 3.0x3.0 m^2. It is floating in seawater (density = 1025 kg/m^3). How many people of 68 kilogram can the raft hold before they start getting their feet wet?

    asked by L
  147. Physics: How much do you way on another planet

    A person weighs 900 N on Earth. What would he weigh on another planet, where the free-fall acceleration is 26.4 m/s2? Answer in units of N.

    asked by HELP ME!!
  148. Chemistry!!!~!!

    A solution of sodium chloride in water has a vapor pressure of 18.5 torr at 25°C. What is the mole fraction of NaCl in this solution? What would be the vapor pressure of this solution at 48°C? The vapor pressure of pure water is 23.8 torr at 25°C and

    asked by Jenn
  149. gen chemistry

    does RbI form an ionic solid?

    asked by ada
  150. math 213

    The effect of depreciation can be computed using a formula similar to the formula for compound interest. a. Assume depreciation is the same each month. Write a problem involving depreciation and solve it. b. Develop a general formula for depreciation

    asked by billy bob
  151. chemistry

    A 1.00 L volume of helium gas is cooled from 50.0 degrees celcius to 25.0 degrees celcius. If the pressure remains constant, what is the final volume?

    asked by annie
  152. calculus

    Differentiate and do not simplify: Y=x^2 * 3^2x

    asked by Anonymous
  153. Math

    What's the difference between sample space and event in a lottery game (where 50 numbers are drawn and you have to guess/pick six numbers?). Can you give examples of both?

    asked by Kevin
  154. excusion

    An exclusion from society is:? 1. an ostracism 2. a philippic 3. a mausoleum 4. a solecism help plz

    asked by recher
  155. Math

    What is equal to: ((6a^2-30a) / a-2))((a^2+2a-8) / (2a^3-10a^2))

    asked by Girl
  156. calculus

    Differentiate and do not simplify: Y=e^-sq.rt.x + e^3 - 2^(3x-1)

    asked by Anonymous
  157. English

    Thank you very much for helping me. These are he very last sentences of thed day. 1)These are the reasons why she stands apart even from her elder sister. 2)Their love is not a love at first sight. They will fall in love only later, after an argument in

    asked by Franco
  158. geometry

    a pie shaped property is 650.00'X488.00'X405.00', what is the amount of acreage? thanks for the help.

    asked by sandy
  159. physics

    A meter stick, suspended at one end by a 0.348m long light string, is set into oscillation. The acceleration of gravity is 9.8 m/s^2. A)Determine the period of oscillation. Answer in units of s. B)By what percentage does this differ from a 0.848m long

    asked by Anonymous
  160. algebra

    - 3x + 7y = 1200 6x + 4y = 3500 what are the x and y values where the two lines intersect

    asked by Anonymous
  161. Physics: Astronauts and space

    When out in space in International Space Station (ISS), Astronauts experience weightlessness. The ISS’s orbit is 354 km (that is 3.54 x 105 m) above the surface of the earth.The distance separating the center of the earth from the center of the ISS is

    asked by HELP ME!!
  162. algebra 2

    find all rational roots of the polynomial 6x^3-13x^2-41x-12=0

    asked by anna
  163. water cycle

    what does water freezes into?

    asked by Anonymous
  164. physics

    A meter stick, suspended at one end by a 0.348m long light string, is set into oscillation. The acceleration of gravity is 9.8 m/s^2. A)Determine the period of oscillation. Answer in units of s. B)By what percentage does this differ from a 0.848m long

    asked by Anonymous
  165. Chmeistry

    given the true molar masses of CuSO4 and H2O how could you find the exact formula of the hydraye from your experimental data. Find the Value of X in the Formula CuSO4x XH2O

    asked by Alex
  166. physics

    A meter stick, suspended at one end by a 0.348m long light string, is set into oscillation. The acceleration of gravity is 9.8 m/s^2. A)Determine the period of oscillation. Answer in units of s. B)By what percentage does this differ from a 0.848m long

    asked by Anonymous
  167. Chemistry

    When i try to do this problem by simply using a mole ratio, wiley keeps saying it's wrong, what mistake am i making? If 0.800 mol of liquid CS2 reacts stoichiometrically according to the balanced equation, how many moles of gaseous Cl2 are required? CS2(l)

    asked by Tokey
  168. chemistry

    how many moles of carbon dioxide will be produced when 2.8 moles of oxygen react (consider the combustion of ethylene: C2H4 + 3 Oxygen2 -->2CO2 +2H2Oxygen

    asked by chem help
  169. Chemistry

    When i try to do this problem by simply using a mole ratio, wiley keeps saying it's wrong, what mistake am i making? If 0.800 mol of liquid CS2 reacts stoichiometrically according to the balanced equation, how many moles of gaseous Cl2 are required? CS2(l)

    asked by Tokey
  170. english

    Is "May you please contact me today?" proper english?

    asked by michael
  171. Social Studies

    What did Thomas Jefferson & Benjamin Franklin say or write to influence the Declaration Of Independence ?

    asked by ana
  172. AED

    , outline your list and assess the 10 steps by explaining how they benefit the ELL students.

    asked by Anonymous
  173. Ions & Atoms-Lab Part 1

    We did a lab on Ions and Atoms. The purpose was basically to identify the properties of an ion and compare them to atoms. These were the Materials -safety goggles -apron -copper(II) chloride (CuCl2) -3 250-ml beakers -water aluminum foil -scissors

    asked by Sara
  174. Economics

    In a one-shot game, if your rival advertises and you advertise, he will earn $7 million and you will earn $2 million in profits. If neither of you advertise, you will make $4 million and he will make $2 million. If you advertise and your rival does not,

    asked by Joe
  175. physics

    A mass attached to a spring executes simple harmonic motion in a horizontal plane with an amplitude of 1.07 m. At a point 0.4815 m away from the equilibrium, the mass has speed 3.87 m/s. What is the period of oscillation of the mass? Consider equations for

    asked by eric
  176. math/ current ratio

    What is the current ratio of $617,169.00

    asked by renee
  177. Fundamentals of Design

    How can you generate each quality of movement and rhythm in a design?

    asked by Kathy
  178. calculus

    solve the initial value problems: 1- dq/dz = 2 + sinz, q(0)=5 2-dy/dx = (x^2 -2)x, y(2)=4 3-dy/dx = 4e^5^x + x, y(0)=4 4- dy/dx 3x + 2, y(3)= 2

    asked by piper
  179. chemistry

    Calculate the energy that must be removed to convert substance X from a gas at 115°C to a solid -50.7°C. Assume X has a molar mass of 75.0 g/mol. Specific heat capacities ΔHvap 20. kJ/mol C(s) 3.0 J/g · °C ΔHfus 5.0 kJ/mol C(l) 2.5 J/g · °C bp

    asked by Trish
  180. calc

    a math professor is thrown off the matthews bridges, height 240ft, by a disgruntled calculus class with an intitial upward velocity of 10ft/s a) assumign the acceleration dude to gravity is -32ft/s^2,find the macimum height of the professor. b) find the

    asked by miley
  181. Pre Algebra

    Write an equation to find the value of X if the perimeter of a triangle =36. AC=x-2, BC=x, AB is unknown.

    asked by Sandy
  182. Accounting 541Accounting Theory and Research

    Efficient markets assume that stockholder wealth is affected by the amount and timing of cash flows. Which alternative is more favorable to them: purchasing before year-end or waiting until January? Explain your answer.

    asked by Anonymous
  183. human resources

    A process involveds drilling holes that are supposed to be 3 inches deep. If it is known that the quality cost of a hole drilled 2.95 inches deep is $5.00, what is Taguchi's quality loss function for this process?

    asked by Loretta
  184. math

    4 in the number 427,083

    asked by Lucy
  185. chemistry

    If 5.0g of Sodium Chloride in 250 mL of solution, what is the percent?

    asked by meg
  186. Math

    For what values of x does x - 9 = 0?

    asked by Nicole
  187. chemistry

    c2h4(g) + 3O2(g) -> 2 CO2 (g) + 2 H2O (g) What volume of oxygen will react with 18 ml of ehtylene, c2h4, assuming that the gases are present at the same temperature and pressure?

    asked by Monica
  188. current ratios

    I am comparing grant income 2002,$617,169.00,2003,$632,889,00 and 2004 $1,078,837.00

    asked by renee
  189. Physics

    An applied force of 50 N at an angle of 47.5 degrees up of East is applied to a 7.25 kg crate. Find the coefficient of friction if acceleration is 3.0 m/s/s E. a. 0.28 b. 0.42 (I know this one is wrong) c. 0.56 d. 0.35 e. 0.49

    asked by Sarah
  190. physics

    A siren mounted on the roof of a firehouse emits sound at a frequency of 900 Hz. A steady wind is blowing with a speed of 15 m/s. Take the speed of sound in calm air to be 343 m/s. (c) Firefighters are approaching the siren from various directions at 15.0

    asked by Stephanie
  191. Chemistry

    what is the % of mass of 50.0g of solute in 45.0g of water?

    asked by allen
  192. 4th grade math

    if a rug's perimeter is 17cm and the area is 13cm, what are the reasurments for the length and width?

    asked by val
  193. Calculus

    If f(x)= 3 + |x-2|, then f'(2) is A. -1 B. 1 C. 2 D. 3 E. nonexistent

    asked by Jane
  194. human resources

    As a manager, you are in charge of making the staffing decisions to handle this new project. You will have to assess the skills and competencies of your current 20-person team in terms of the demands of the new project. Since none of your current team has

    asked by kimberly
  195. Economics

    Quality Adjusted Life Years evaluates interventions in _____ rather than _____. a. dollars; years b. utility; dollars c. years; dollars d. dollars; utility

    asked by Zoe
  196. engineering

    ANPR system takes two images of each passing car. each image is 840 pixels wide and 320 pixels high. each pixel is stored in one byte. on average six car pass per minute. if each uncompressed image is sent back to the control centre for processing, what is

    asked by kenji86
  197. Finance

    I have a number of questions for a finance assignment that is meant as a review for our final. However my final is being written earlier than the rest of the class so the answers aren't up yet. I was hoping someone could answer two or three of the

    asked by Brian
  198. world geography

    how did deng's four modernizations program greatly increase china's farm production

    asked by shay
  199. calculus

    Determine the equation of the line that is tangent to y=8^x at the point on the curve where x=1/2

    asked by Anonymous
  200. English

    I really find it hard to correct these sentences as I'm not a mother-tongue speaker. I've tried to correct some of them myself but I'm still doubtful. Can you please help me check the grammar? Thank you very much in advance. 1.A woman always depended on

    asked by Franco
  201. 4th grade

    13 yd = how many ft

    asked by yvette
  202. statisics

    The annual Salary of an electrical engineer is given in terms of the years of experience by the table below. Find the equation of linear regression for the above data and obtain the expected salary for an engineer with 45 years of experience. Round to the

    asked by Anonymous
  203. adult education

    Convert to degress 43 25'

    asked by john
  204. hca270

    Approaches to Valuation Part I: Compute the worth of Arcadia Hospital in 2005 using rules of thumb, adjusted book value, and discounted cash flow valuation (for this final method, use the table provided). Assume the cash flow for 2005 is the same as 2006.

    asked by gea
  205. 12th grade

    solve: sec(1/4)X+"Square Root of 2"=0

    asked by Jamie
  206. chemistry

    if you have a reaction with an acid dissociation, where one HA goes to H + A how can the entropy be negative? I thought that one mole going to two moles would have positive entropy because of the greater disorder.

    asked by carla
  207. Math

    If a rectangular box has A width of 2cm, a length of 3cm, and a height of 5cm, what is the surface area? Is it 62cm2?

    asked by Evie
  208. global

    How did geography both help and hinder Allied advances?

    asked by christina
  209. computers

    True or False The SDLC is NOT used in support of project management to plan, ececute, and control systems development projects.

    asked by Mary
  210. space

    Will a lightbulb pop in space?

    asked by Annie
  211. math-probability

    A student claims that if a fair coin is tossed and comes up heads 5 times in a row, then, according to the law of averages, the probability of tails on the next toss is greater than the probability of heads. What is your reply?

    asked by jennifer
  212. math

    One card is selected at random from an ordinary set of 52 cards. Find the probability of each of the following events: b. A spade and a 5 are drawn. d. A jack is not drawn

    asked by crystal
  213. chemistry

    A student performs a back-titration to determine the cost -effectiveness of an antacid. A tablet with a retail cost of $0.053 is dissolved in 25.00 ml of 1.000 M HCl, then back-titrated with 1.000 M NaOH. Exactly 14.82 ml of NaOH solution is required to

    asked by Lisa
  214. Grammar and Composition

    Word: abreast Meaning: side by side Sentence: They walked two abreast down the street Synonym: in alignment Part of Speech: Is it an adverb or an adjective?

    asked by y912f
  215. Derivatives- Math

    Can someone explain how to find the derivative of : 1. y= 5^ãx / x And the second derivative of: y= xe^10x For this question I got up to the first derivative and got this y = e^10x + 10xe^10x but I can't seem to get the correct answer for the second

    asked by Mae
  216. history

    Why does James Fraser claim that there was great diversity in the progressive education movements? Summarize, and compare and contrast, the platforms of four different progressive educational reform groups. Which group do you believe had the best ideas?

    asked by rei
  217. Geography

    I was wondering if a plane flew west and kept flying, would it be possible for it to never fly into night if it didn't stop?

    asked by Andrew
  218. 4th grade

    What is the correct punctuation in the following sentences. Do I need quotation marks? Sarah: I am going to the game tomorrow. Mary: Okay. Do you want to ride with me?

    asked by Nan
  219. chemistry

    when water is added to solid calcium carbide, CaC2, acetylene gas,C2H2,and calcium hydroxide,Ca(OH)2, are produced. how do i write a balanced equation for the reaction.

    asked by 6784
  220. chem

    when water is added to solid calcium carbide, CaC2, acetylene gas,C2H2,and calcium hydroxide,Ca(OH)2, are produced. how many moles of acetylene are produced when 0.50 mole of calcium carbide reacts?

    asked by 6784
  221. chem

    when water is added to solid calcium carbide, CaC2, acetylene gas,C2H2,and calcium hydroxide,Ca(OH)2, are produced. how many moles of calcium carbide are needed to completeley react with 5.00 * 10^22 water molecules?

    asked by 6784
  222. english

    what group have responseblity for the weather forcast

    asked by michaela
  223. Grammar

    Identify each intensifier and the word it modifies. 1. I am somewhat unclear about the details. SOMEWHAT AND UNLCEAR 2. Jorge's score on that test was nearly perfect. NEARLY AND PERFECT 3. Although I was quite nervous, I apeared calm and collected. QUITE

    asked by Tiffany
  224. 10th grade

    i need an interesting topic for a tenth grade informative essay

    asked by Dallas
  225. chemistry

    what is the vapor pressure of ethonal at 75°c?

    asked by sarah
  226. 3rd grade

    i am greater than 30 and less than 40 the sum of my digits is less than 5

    asked by mike
  227. Math

    20% of a number is 8 ... fine the number 20 divided by 100 is 5, 8 divided by 5 is 1.6 is the answer 1.6/8 ?

    asked by Rebecca
  228. science: ap chem

    is NaH2CO3 soluble and separate into Na+ and H2CO3- ions?

    asked by anonymous
  229. Calculus

    Find the equation of the tangent line to the curve y=1+ xe^(2x) y'=(e^(2x))(2x+1) = slope What's the next step?

    asked by sh
  230. Algebra

    factor completely -36c^4 + 289c^2 -400

    asked by Chelsea
  231. Math Site

    Is there an online site that talks about Linear Relations thoroughly. Could you please post links to some. I tried going to mathisfun. c o m , because that is usually the only site which explains everything well and fits everything into my head;

    asked by Sara
  232. english

    In the book, When the Legends Die, what does it mean when Tom draws the deer in the dirt?

    asked by kc
  233. Gen Chemistry

    [Ag(NH3)2]+ is a colorless complex ion right?

    asked by gagaga
  234. global

    How did geography help hinder Allied advances?

    asked by christina
  235. Gen Chemistry

    [Ag(NH3)2]+ is a colorless complex ion right?

    asked by gagaga
  236. english

    Which sentence below contains a dangling modifier? 1. I threw the newspaper in the waste basket after I read the editorial. After I read the editorial, I threw the paper away. After reading the editorial, I placed the newspaper in the waste basket. After

    asked by christopher
  237. Chemistry

    What must be the pH of a solution that is 0.049 M Fe3+ to just cause Fe(OH)3(s) to precipitate?

    asked by Chemistry Confused
  238. Grammar and Composition

    I'm having trouble writing a sentence using the word accentuate It means to give emphasis to something

    asked by y912f
  239. englísh

    what group have responiblity for weather forcasting

    asked by michaela
  240. English

    1. I brushed my teeth as I took a shower. 2. I brushed my teeth because I took a shower. 3. I brushed my teeth while I took a shower. 4. I brushed my teeth taking a shower. (Does #1 mean #2 or #3? Is #3 the same as #4?)

    asked by rfvv
  241. Trigonometry

    Prove it is an identity. (sin^2x)/(tanx)=sinxcosx

    asked by .
  242. English

    1. I brushed my teeth so I took a shower. 2. I brushed my teeth because I took a shower. (Are both grammatical? What do they mean?)

    asked by rfvv
  243. chemistry

    sodium azide, decomposes according to the following equation: 2NaN3 (s) -> 2Na (s) + 3N2(g) What mass of sodium azide is required to provide nitrogen needen to inflate a 80.0 L bag to a pressure to 1.35 atm at 25 c?

    asked by eveline
  244. chemistry

    how many moles of acid must be added to the blood to bring the carbonic acid/hydrogen carbonate ratio from 1:2 to 1:10?

    asked by jacky
  245. Chemistry

    Calculate the molar solubility of barium thiosulfate in 0.0045 M Na2S2O3(aq). (Hint: Check any simplifying assumptions that you make.)

    asked by Chemistry Confused
  246. English

    Which sentence below contains a dangling modifier? Finding a place to sleep, the bed was comfortable. The bed was a comfortable place to sleep. Finding a place to sleep was difficult. Finding a place to sleep, the children thought the bed was comfortable

    asked by christopher
  247. Math

    A student asks what exactly Euclidean geometry is. How do you answer?

    asked by Ella Mae
  248. english

    Which sentence below contains a dangling modifier? Keeping to himself, the corner of the room seemed like a good place to stand. John kept to himself by standing in the corner. Standing in the corner, John kept to himself. Keeping to himself, John stood in

    asked by christopher
  249. chemistry

    ( from the previous chemistry question)hydration just means H2O would attach to the ions, right? would the H2O attach to the -F to form larger molecules? how does the entropy change from that?

    asked by carla
  250. math

    (x^5/x^2 6x 9) (5/x^2 5x 6)

    asked by Anonymous
  251. Algebra

    7. Johnny needs to save $24.00 to buy a new video game. Three weeks after saving, he has $6.00. After 6 weeks, he has $12.00. If Johnny continues to save at this rate, how many total weeks will he have saved money to reach his goal? The answer I got was 12

    asked by mysterychicken
  252. social studies

    what role does the media play in shaping government policy and actions?

    asked by rayray
  253. 2nd grade

    why do people communicate

    asked by roni
  254. math

    two trains start from towns 208 miles apart and travel towards each other on parallel tracks. They pass each other 1.6 hours later. If one travels 10 mph faster than the other find the speed of each train?

    asked by MB
  255. MATH

    20% of a number is 8 ... fine the number 20 divided by 100 is 5, 8 divided by 5 is 1.6 is the answer 1.6/8 ?

    asked by Rebecca
  256. English

    1. I am leaving now to take the train. 2. I am moving now to take the train. 3. I will leave now to take the train. (Does #1 mean #2 or #3? Is the subject moving or is the subject going to move in the near future?)

    asked by rfvv
  257. Human Services

    Garison Ford has complained that his supervisor has not given him an opportunity to take on any of the more serious field assignments in the unit. He thinks it is because of his age and he cites age discrimination... I need 3 Pros and 3 Cons of how to

    asked by Veronica
  258. statistics

    a mathematics professor wishes to analyze the relationship between the number of papers graded by his department's student homework graders an the total amount of money paid to the graders. He collects data for 12 randomly chosen graders and uses MINITAB

    asked by Anonymous
  259. Chemistry

    How can the Tyndall effect be used to distinguish between a colloid and a solution? Can the presence of Brownian motion distinguis between a solution and a colloid? explain.

    asked by Kim
  260. math

    a jar contain 8 blue blocks 4 red ,9 orange and 4 green ones. About what fraction of the time would you expect to pull out a blue block?

    asked by anne
  261. trig

    solve for all solutions sin(x)=sin(2x)

    asked by Crystal
  262. Precalculus(URGENT)

    write the parabola in y squared=4ax or x squared =4ax form where x equals the distance between the foci and the centerpoint y= -(x+3)squared +4 i have no idea how to do this can you tell me how you got the solution

    asked by Arielt -Help now fast due tommorow
  263. Calculus

    Find the derivative of (sin(^3)x)(tan x) Please explain to me in steps please , thank you

    asked by Christine
  264. trig

    evaluate the following without using a calculator and please explain how cos(arctan 3)

    asked by Crystal
  265. MATH

    WHAT PERCENTAGE OF 186,000.00 IS 30,000.00?

    asked by MARY
  266. Chemistry - Heat Calculations

    Calculate the heat released when 4 L Cl2 with a density of 2.46 g/L at 25 degrees C reacts with an excess of sodium to form solid sodium chloride at 25 degrees C.

    asked by Akira
  267. English

    1. He was sick so he couldn't go to work. 2. He was sick, so he couldn't go to work. 3. He was sick so that he couldn't go to work. (What is the difference among them? Does #1 mean #2 or #3? What is the meaning of #1?)

    asked by rfvv
  268. chemistry

    How to calculate enthalpy change of the following reaction? : S + 2h2o >>> so2 + 2h2 given: s+o2 >>> so2 - enthalpy change = -296.8 kJ h2 + 1/2o2 >> h20 enthalpy change= -285.8kj I was trying to solve it myself but i got confused.. i know i have to change

    asked by olexandra
  269. science

    Between 1960 through 1980 which year produced the greatest percentage of fish?

    asked by Alice
  270. statistics

    When you add the values 3, 5, 8,12, and 20 and then divide by the number of values, the result is 9.6. Which term best describes this value: average, mean, median, mode, or standard deviation?

    asked by Anonymous
  271. 4th grade

    Mr. Kimball has a swimming pool that measures 20 feet long by 15 feet wide. He is adding a walkway around the pool that is 3 feet wide all around. What will be the perimeter of the walkway?

    asked by Kiara
  272. Science

    A chemist weighed out 5.16 g of a mixture containing unknown amunts of BaO(s) and CaO(s) and placed the sample in a 1.50-L flask containing CO2(g) at 30.0°C and 750. torr. After the reaction to form BaCO3(s) and CaCO3(s) was completed, the pressure of

    asked by Genn
  273. English

    1. "He is very nice," said Bill. 2. " How nice he is!" Bill said. 3. "How are you?" he said. 4. "Go away," said he. 5. "Shall we go there?" said Bill. 11. Bill said, "He is very nice." 22. Bill said, " How nice he is!" 33. He said, "How are you?" 44. He

    asked by rfvv
  274. writing

    what is a word describing school that starts with the letter k?

    asked by sudipa