1. Science

    A solution of silver nitrate is mixed with a solution of potassium sulphide.Write the molecular,total ionic,and net ionic equations illustrating the reaction.

    asked by Shane on November 23, 2012
  2. Chemistry

    A student is instructed to standardize an approximately 2.5N KOH solution using a 0.500N H2SO4 stock solution. Describe the experimental procedure he/she must follow. I do not understand what procedure needs to be followed.

    asked by Candice on January 26, 2015
  3. college Chemistry

    An aqueous solution of hydrogen peroxide, H202 (MW=34.01amu), is labeled 10.0% by weight. What is the molal concentration of H202? All I really know is that molality = moles of solute per kilogram of solution

    asked by Donna on March 28, 2010
  4. Chemistry

    What are the concentrations of A– and HA after 24 mL of 0.33 M hydrochloric acid solution is added to 86 mL of a solution that has [A– ]=0.67 M? Do NOT consider any equilibrium reactions in this problem. A–(aq) + HCl(aq) → HA(aq) + Cl–(aq) How do

    asked by John on March 31, 2013
  5. chemistry

    sodium metal dissolves im liquid mercury to form of NA(s) and Hg(l) are 0.97 g/ml and 13.6 g/ml respectively. a sodium amalgoum is made by dissolving 10 ml Na (s) in 20.0 ml Hg (l). The final volume of solution is 21.0 ml. Calculate the molarity of Na in

    asked by masharat on January 31, 2013
  6. Chemistry 22

    A 19.18 mL of 0.125 M Oxalic Acid (H2C2O42H2O) is titrated with a Ca (OH)2 solution. The initial volume of Ca(OH)2 was 14.38 and the final volume of Ca(OH)2 was 28.29 mL when the solution turned very slightly pink. What is the concentration of Ca (OH)2?

    asked by Ivy on December 4, 2010
  7. chem-acid base titrations

    If 20.0mL of .2019M HCI requires 39.63mL of a NaOH solution for complete neutralization, what is the concentration of the NaOH solution? how many significant figures are justified in the answer?

    asked by natash on April 7, 2008
  8. chemistry

    What is the pH of a buffer solution if you have 250 ml of a 1.56M Acetic Acid and you added 26.56 grams of sodium acetate (NaCH3CO2)? What is the new pH if you now add 1gram of NaOH to the buffer solution?

    asked by lilly on August 5, 2015
  9. chemistry

    A sample of potassium hydrogen oxalate, KHC2O4, weighing 0.717 g, was dissolved in water and titrated with 18.47 mL of an NaOH solution. Calculate the molarity of the NaOH solution.

    asked by mary on April 27, 2015
  10. chemistry

    What is the molarity of a solution containing 8 grams of solute in 500 mL of solution? Round to the nearest hundredth. Don't forget the unit! (gram formula mass of solute = 24 g)

    asked by archie on September 30, 2011
  11. chemistry

    What is the molarity of a solution containing 8 grams of solute in 500 mL of solution? Round to the nearest hundredth. Don't forget the unit! (gram formula mass of solute = 24 g)

    asked by archie on September 30, 2011
  12. Chem

    You've just prepared a solution by transferring 20.0 g of glucose into a 1.0 - L volumetric flask, and adding water to the mark. Calculate the concentration of the glucose solution in terms of millimoles/Liter, mg/mL, and % (m/v).

    asked by Britt on September 1, 2009
  13. Science, Chemistry

    A 1050.0 mL solution of NaOH is neutralized by 0.25 L of 2.00M Nitric Acid using Bromothymol Blue as an indicator. The concentration of the NaOH solution is 0.48M. True or False

    asked by Anonymous on January 9, 2017
  14. Chemistry

    I still need help with this problem... Calculate the concentration of the solution the molality of hydroxide ions in a solution prepared from 9.16 g of barium hydroxide dissolved in 179 g of water I do not know how to approach this...I keep doing something

    asked by Trixie on February 15, 2010
  15. Analytical Chemistry

    The question: The pH of a solution is defined as pH = -log[H3O+]. If the pH of a solution is 3.72(+/- 0.03), what is the [H3O+] and its absolute standard deviation? Answer: How would I carry this out? I know to find the hydronium concentration wouldn't i

    asked by James on January 28, 2013
  16. chemistry

    A 100.0 mL portion of 0.250 M calium nitrate solution is mixed with 400.0 mL of .100M nitric acid solution. What is the final concentration of the nitrate ion?

    asked by alex on October 24, 2010
  17. biochemistry

    A solution was prepared by dissolving 8.0g of solid ammonium sulfate (MW= 132.14, specific volume= 0.565ml/g) in 35ml (i.e 35g) of water. What is the final volume of the solution?

    asked by KIm on August 30, 2012
  18. Chemistry

    Calculate the pH of a buffered solution prepared from 0.25 mol KF and 0.75 HF after the addition of 0.05 mol of NaOH (assume a 1.0 L volume of solution) I get that i need to use two separate ice tables, but i don't really understand how to go about doing

    asked by Megan on May 12, 2016
  19. chemistry

    Why do the concentrations of Pb 2+ and SO4 2- ions in a saturated solution of PbSO4 in contact with solid PbSO4 remain the same when the solution evaporates to half of its original volume? it has to do with equilibrium.

    asked by alex on March 28, 2012
  20. Chemistry

    Calculate the concentration (% W/V) of NaCl solution that was made by dissolving 15.0 g of sodium chloride in enough water to make 300.0 mL of solution. Okay the answer is 5.00%....however I keep getting 0.0500%....Why? and which one is the correct answer?

    asked by Chemistry Chick on October 29, 2011
  21. Chemistry

    A 200-mL solution of KCl(aq) was electrolyzed for 10.0 minutes, producing Cl2 gas at the anode and H2 gas at the cathode. If the pH of the final solution was 12.40, what was the average current (in amps) used?

    asked by DrBobFan on April 1, 2017
  22. Higher Maths

    Show that these three points , P(-8,3), Q(-3,4),R(-6,-7), Form a right angled triangle and name the right angle? There are two ways of doing this: 1) determine the slopes for all lines, and the pair that have a right angle will have a negative inverse

    asked by R0SS on September 1, 2005
  23. grade 8 pre-algebra

    Grace earns 7 dollars for each car she washes. She always saves 25 dollars of her weekly earnings. This week, she wants to have at least 65 dollars in spending money. How many cars must she wash? Write and solve an inequality to represent this situation.

    asked by mark on November 4, 2017
  24. Science

    Really confused on this question. A microbiologist measures the speed of a swimming bacterium. The bacterium covers a distance of 2.16 microns in 5.0 seconds. The biologist wished to compare the speed of the bacteria with other animals, but the speeds of

    asked by Gianna on September 27, 2013
  25. stats

    1. Conduct a hypothesis test for the following scenario. SHOW ALL YOUR WORK THE WAY WE DID IN CLASS! A coffee-dispensing machine is supposed to deliver 12 ounces of liquid into a large paper cup, but the costumer believes that the actual amount is less. As

    asked by Anonymous on May 10, 2016
  26. AP Chemistry

    A mixture of aluminum and zinc metal is used in 2 experiments described below: A- A 1.7 gram sample of the mixture is reacted with excess hydrochloric acid and the resulting hydrogen gas is collected over water. The reaction takes place at 750 mm Hg

    asked by Kate on April 3, 2011
  27. chemistry

    Methanol boils at 65Celcius. The vapor pressure of ethanol at 65Celcius is at 410 torr. for a mixture containing .200 mol of methanol and .100 mol of ethanlol (at 65 Celcius) calculate the: 1. partial pressure of each liquid 2. total vapor pressure of the

    asked by Cerise on October 25, 2009
  28. Chemistry URGENT

    Could someone let me know if I answered these questions? 1. How do you classify the liquid pair mineral oil -- H2O, miscible or immiscible? I believe the answer is immiscible because oil and water do not mix. 2. what would be the Molarity of a solution

    asked by jazz on April 29, 2014
  29. Problem Solving Math

    I can not find my notes over my distributive property. I know this problem is really easy, I just am not sure where to start! Solve each of the followng: 2x+5 = 3x-4 Also, this problem. I am not sure where to begin: For a particular event, 812 tickets were

    asked by Krisy on September 4, 2006
  30. physics3

    home / study / science / physics / physics questions and answers / Ed And Annie Are Ice Skating. Ed (55 Kg) And Annie (40kg) Both Wearing Skates Face Each Other ... Your question has been answered Let us know if you got a helpful answer. Rate this answer

    asked by TK on April 26, 2018
  31. World History

    what is the danger of Lenin's idea of party leadership? Lenins idea of party leadership was dangerous because in such a corrupt system, a party was terrible for the local environment. Many people would fight for the top leadership position. thanks. why did

    asked by Dennis on January 30, 2007
  32. Chemistry

    I need to calculate the mass of CO2 produced in the reaction of NaHCO3 + HCl Data Mass of NaHCO3 = .05g Mass of system before reaction 117.9 g Mass of system after reaction 117l98 Maxium pressure 1.4094 initial pressure 1.0094 pressure change .4 temp

    asked by Sarah on June 24, 2014
  33. chemistry

    3. A solution is made by dissolving 5.00 g of impure sodium hydroxide in water and making it up to 1.00dm3 of solution. 25.0 cm3 of this solution is neutralized by 30.0 cm3 of hydrochloric acid of concentration 0.102 mol/dm3. a) Calculate the number of

    asked by gasana on April 18, 2017
  34. Math

    I'm having trouble with this question At the movies, it costs $5.00 to rent each movie. If you do not return the rentals on time, it costs you $3.00per movie rental per day. You recently rented movies from the business and returned them 2 days late. The

    asked by Ann on February 26, 2017
  35. Program Design and Development

    Design a class called SimpleCalculator using psudoecode that contains public methods named add(), subtract(). Each of the methods accepts two numeric arguments and returns a number that represents the result of the appropriate arithmetic operation. Design

    asked by john on April 8, 2017
  36. science

    Discuss the importance of each step in the scientific method. Why do you think scientists utilize this type of experimentation and reasoning? (Broken Link Removed) Discuss the importance of each step in the scientific method. Why do you think scientists

    asked by Trenet on March 5, 2007
  37. statistics

    I.use the chebyshev's theorem to find out what percentage of the values will fall between 201 and 257 for a data set with a mean of 229 and standard deviation of 14. II. use the emperical rule to find out two values 68% of the data will fall between for a

    asked by mary on October 11, 2010
  38. algebra "reiny"

    how would you write an equation or inequality that could be used for analysis, prediction example gas prices? can some one explain to me how to write this i was going to do mine on diet how my sister last pounds on her diet she weight 410 lbs to begin with

    asked by carla on April 16, 2007
  39. algebra

    how many ounces of a 26% alcohol solution and a 44% alcohol solution must be combined to obtain 56 ounces of a 29% solution?

    asked by Junior on February 19, 2015
  40. hct

    How many pints of a 7% cleaning solution must be mixed with 9 pints of a 15% cleaning solution to give a 13% solution?

    asked by lody on March 14, 2015
  41. chemistry

    1. Find the pH of a solution whose [H3O+] is 9.5 X 10^ -8 M. 2. What is the [H3O+] concentration of a solution with a pH of 5.45? 3. What is the pOH of a solution with a [OH -] concentration of 2.97 X 10^ -10 M?

    asked by kellin on May 14, 2012
  42. college algebra

    How many gallons of a 30% alcohol solution must be mixed with 60 gallons of a 14% solution to obtain a solution that is 20% alcohol

    asked by yvette on August 5, 2014
  43. Algebra

    How many ounces of a 26% alcohol solution and a 32% alcohol solution must be combined to obtain 34 ounces of a 29% solution?

    asked by Jennifer on October 7, 2018
  44. journal assignment

    how many liters of a 10%solution of acid should be added to 20 liters of 60%solution of acid to obtain a 50%solution?

    asked by frank on June 2, 2008
  45. algebra 1,urgent

    the expression (4x^2-3x+1)-(x^3+2x+7) what is the coefficient of the x term in the simplified expression? what is an equation of a line parallel to the line with equation 2 y=14-6x a.y=-6x+18 b.y=-3x-9 c.y=6x+3 d.y=3x+8 Solve linear system, which

    asked by Sven on April 23, 2013
  46. Precalculus

    Show the first three terms of each related sequence or series and solve each problem. 1) Jerry hopes to buy a camera which costs $680. He plans to save $5 more each month than in the month before, beginning with $5 this month. In how many months will he

    asked by Claire on November 12, 2015
  47. Physics

    A coordinate system (in meters) is constructed on the surface of a pool table, and three objects are placed on the table as follows: a 4.0 kg object at the origin of the coordinate system, a 5.0 kg object at (0, 2.0), and a 9.0 kg object at (4.0, 0). Find

    asked by Anonymous on November 14, 2011
  48. Chemistry

    For the teaction system, 2SO2(g) + O2(g) 2SO3(g), Kc has a value of 4.62 at 450.0K. A system, at equilibrium, has the following concentrations: [SO3] = 0.254 M, [O2] = .00855 M. What is the equilibrium concentration of SO2(g)? The correct answer is 1.28M,

    asked by Mikey on July 20, 2016
  49. Physics

    A coordinate system (in meters) is constructed on the surface of a pool table, and three objects are placed on the table as follows: a 7.0-kg object at the origin of the coordinate system, a 8.0-kg object at (0, 2.0), and a 17.0-kg object at (4.0, 0). Find

    asked by Allie on October 6, 2011
  50. Chemistry

    What will be the pH of: (a)10.0cm3 of an aqueous solution of 0.001mol dm^-3 nitric aicd, HNO3 (aq)? (b)100cm3 of an aqueous solution of 0.001mol dm^-3 nitric aicd, HNO3 (aq)? (c)0.02mol dm^-3 of potassium hydroxide solution, KOH (aq)? For (a) I got 2, (b)

    asked by Anonymous on November 17, 2009
  51. Biology

    What happens when a substance dissolves in the watery solution outside of a cell and equilibrium is disrupted. a. Water from the cell will move into the solution b. water from the solution will move into the cell c. the pores in the cell membrane will

    asked by David on October 24, 2013
  52. math

    How would I come about to the solution and what the answers to the question so I can help my son with his school work? 1.Check all the answers that are square roots of 36 a. 36^1/2 b.-(36)^1/2 c.9 d.6 e.-6 f. √36 2.)Which answers are equal to the

    asked by James on June 7, 2011
  53. AP Chem

    Hey guys! Stuck on some pH problems! Thanks so much in advanced: A) Calculate the pH of a 0.200 M solution of potassium acetate, KCH3CO2, in water at 25 °C. At this temperature, Ka = 1.76 × 10-5 for acetic acid. 1. 2.73 2. 5.45 3. 9.02 4. 9.94 5. 10.16

    asked by Allie on October 10, 2015
  54. chemistry

    EDTA: 292.2 1. How would you make 250ml's of a 15% EDTA solution 2.How much of solution 1(above)should be used to make 500ml's of a .1% EDTA solution.

    asked by frank on December 5, 2014
  55. pharmacy tech.

    a pharmacist has a 40% acid solution and has a 25% acid solution. How many liters must be mixed to form 54 liters of a 27 % acid solution?

    asked by Karen on August 31, 2012
  56. Math

    a pharmacist has a 40% acid solution and has a 25% acid solution. How many liters must be mixed to form 54 liters of a 27 % acid solution?

    asked by Karen on August 31, 2012
  57. basic algebra

    Boris has 10 ounces of a 10% acid solution. How many ounces of 25% acid solution should he add to make a solution that is 20% acid? Thank you.

    asked by Mike on March 4, 2014
  58. Algebra 2

    A chemist has a bottle of 1% acid solution and a bottle of 5% acid solution. She wants to mix the two to get 100 mL of a 4% acid solution. How much of each should she use?

    asked by Megan on April 22, 2015
  59. Math-Algebra

    Meg has a solution that is 40% alcohol and another solution that is 60% alcohol. If Meg wants 12 gal of a solution that is 45% alcohol, how much of the two solutions must be mixed?

    asked by McKenna Louise on February 4, 2014
  60. Math

    Decide whether each equation has one solution, no solution, or infinitely many solutions. 2(x-3)=2x A. One Solution B. No solutions C. Infinitely many solutions Is the answer A?

    asked by Gwen on September 16, 2014
  61. Algebra

    Could somebody correct my answers?? 1. Which of the following is an example of an open equation? A. 5× + 7=12 B. 12 + (-8)=4 C. 25 =5(5) D. 8+0=8 2. Which of the following equations has 3 as the solution? A. -2b=6 B. 4a-5=12 C.5y=y+8 D. Z-15=-12 3. Is

    asked by Lordd on October 15, 2018
  62. Propagating error

    Find the absolute and percent relative error for each calc. b) 81.5 (+/- 0.5) x 40.2 (+/- 0.2)/ 21.8 (+/- 0.2) my answer for absolute error was 150. +/- 200, which is outrageous. Can someone show how they would do it so I can compare and find my mistake?

    asked by Chris on September 16, 2006
  63. Math-Population Word Problem

    The population of rabbits in a national forest is modeled by the formula P=8,600+650 ln(t+1) where "t" is the number of years from the present. a)How many rabbits are now in the forest b)Estimate when it will take for the number of rabbits to reach 12,000?

    asked by Jake on March 26, 2013
  64. Physics (2)

    I have this number where they give me the coordinates of 3 particles and the mass of each one of them. Afterwards, there's a force applied on 2 of those particles and they ask me to calculate the systems total moment of inertia. But then they ask me this:

    asked by Raf on February 21, 2012
  65. 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 on April 19, 2010
  66. Chemistry

    1. A good indicator will have a(n)____ close to this volume and pH. I think it's endpoint but it's wrong. 2. (part a) What is the pH of the solution created by combining 1.70 mL of the 0.10 M NaOH(aq) with 8.00 mL of the 0.10 M HCl(aq)? with 8.00 mL of the

    asked by Jody on April 28, 2012
  67. History

    2 of 18 Civilizations of the Americas Unit Review Which of the following statements explains why the Aztec continually waged war? The Aztec needed prisoners of war to work the land. The Aztec needed more people to help build their pyramids. Th Aztecs

    asked by Joe on April 12, 2019
  68. PHysics

    A 250 kg load is lifted 23 m vertically with an acceleration a = 0.185g by a single cable Determine the tension of the cable. =2900N Determine the net work done on the load. =? Determine the work done by the cable on the load. =66700 J Determine the work

    asked by Arthur on February 25, 2011
  69. chemistry

    Which of the following statements is true concerning the titration of a weak base by a solution of hydrochloric acid? Question 9 options: At the equivalence point, the pH is 7. At the equivalence point, there is excess hydrochloric acid. At the equivalence

    asked by Anonymous on April 16, 2014
  70. PLEASE CHECK ASAP

    Thanks for checking 1.D 2.C 3.B 4.C 5.C 1.According to "Michael Faraday's World," which intrigued Michael Faraday? A.automobiles B.airplanes C.photography D.batteries 2.How are the operating room in the Williams story and the atom-splitting lab in the

    asked by Matt on September 16, 2014
  71. PLEASE CHECK ASAP!

    Thanks for checking 1.D 2.C 3.B 4.C 5.C 1.According to "Michael Faraday's World," which intrigued Michael Faraday? A.automobiles B.airplanes C.photography D.batteries 2.How are the operating room in the Williams story and the atom-splitting lab in the

    asked by Matt on September 15, 2014
  72. Math Help

    The end of a spring is pulled as far as it will go and then is released. On the first bounce back it extends 135 cm. On its second bounce back it extends 45 cm. On its third bounce back it extends 15 cm. How many times will the spring bounce back before it

    asked by Maggie on May 8, 2012
  73. Math

    The end of a spring is pulled as far as it will go and then is released. On the first bounce back it extends 135 cm. On its second bounce back it extends 45 cm. On its third bounce back it extends 15 cm. How many times will the spring bounce back before it

    asked by Maggie on May 7, 2012
  74. Prorgramming in Java

    Arrays of objects will demonstrated in this lab by developing a Java application to create and maintain a store's catalog of offerings. You may use either an Array or an ArrayList. Your classes should be complete with toString and equals methods and must

    asked by James on October 5, 2009
  75. math

    Laura want to purchase 4 shirts and 3 hat the cost of each shirt at Wm is$15.20.the cost of the hat at Wm is $5.200 the cost of the same shirt at Sm is 5 percent more than the cost at Wm the cost of the same hat at Sm is 2 percent more than the cost at Wm

    asked by tamara on April 1, 2011
  76. World History

    Which statement BEST describes Vietnam int he years following the Vietnam war ? A.Vietnam was a country divided by communism and dominated y captialist investment. B.Vietnam was a country mired in prverty and unable to attract foreign captital. C.Vietnamn

    asked by Ciara's Sister on December 16, 2011
  77. English

    Please indicate if these details are including in paragraph. The paragraph must describe one particular experience you’ve had that inspired you or guided you to choose the type of position for which you applied. show you have thought carefully about what

    asked by Evelyn on January 18, 2013
  78. Math

    How can you tell whether an equation has One solution,Many Solution , No solution?

    asked by Gabby on September 20, 2016
  79. Chemistry

    how much 2% solution do I need to convert 20 ml of 5% solution to a 3% solution?

    asked by Eli on October 12, 2011
  80. Accounting

    1. Complete Problem 14.1 on page 279 of the course text (solution is on page 501-502). Next, work the problem again using the following variables: project yield annual net cash inflows are $10,500 for the next five years; interest rate of 16.5%, and the

    asked by Nicole on April 4, 2013
  81. Deadline Approaching: Please Help

    SIMPLEX METHOD - Table: Nutrient Peanuts Raisins M&Ms Pretzels Calories 855 435 1024 162 Protein 34.57 4.67 9.01 3.87 Fat 72.50 0.67 43.95 1.49 Carbs 31.40 114.74 148.12 33.68 Suppose that you want to make at most 10 cups of trail mix, using all the

    asked by Jay on June 6, 2011
  82. Food Chemistry

    Calculate the amounts and pH values for preparing the following acetic acid/acetate buffer solution. 1.) In the first step, If you plan to prepare a 2.00 M sodium acetate in 200.0 mL distilled water, how many grams of sodium acetate should be added in

    asked by Lauren on April 29, 2010
  83. chemistry

    I am doing a home lab experiment about acid-base neutralization. I just need a little help to see if I am doing it correctly. I completed the experiment and recorded the data. We were to add 25 ml of vinegar and the 1 ml of cabbage indicator, the add i ml

    asked by Lynn on March 6, 2010
  84. Economics

    The firm currently uses 70,000 workers to produce 300,000 units of output per day. The daily wage (per worker) is $100, and the price of the firm’s output is $30. The cost of other variable inputs is $500,000 per day. Although you don’t know the

    asked by Vision on November 18, 2008
  85. Math

    The firm currently uses 70,000 workers to produce 300,000 units of output per day. The daily wage (per worker) is $100, and the price of the firm’s output is $30. The cost of other variable inputs is $500,000 per day. Although you don’t know the

    asked by Randy Tan. on November 18, 2008
  86. Calculus

    The blood alcohol concentration after a drink has been consumed can be modelled by c(t)=(0.02t)e^(−0.05t) where t is the time in minutes elapsed after the consumption of the drink and c(t) is the concentration in mg/mL at t. At what time in the first

    asked by Anonymous on November 1, 2014
  87. Calculus and Vectors

    In triangle RST, RS=4, RT=7, and ST=5. Determine the measures of the angles to the nearest degree. I solved correctly for T's angle of 34 degrees. Once I try using the sine law to solve for angle S, I keep getting 78 degrees, when it's supposed to be 102

    asked by Chuck on September 9, 2015
  88. Computer Science-Java

    Hi, I am writing an application class for a Lunar Calendar I created in a service class and I have to make sure it is able to detect that the year entered is not in the range of values(I have done this in the service class using a switch statement) and be

    asked by Lisa on November 3, 2009
  89. Science can you help me

    Praire dogs dig alot of underground tunnel systems called "towns". They come to the surface to eat grasses. Cause all animals need to eat food.One reason prarie dogs dig alot of underground tunnel systems called wonderful "towns" is to

    asked by Hot stuff on April 18, 2007
  90. CALC

    I am sorry i still don't know how to start. and i am sorry for the problem earlier..it wasn't my fault :( Note that the way students like you are asked to solve this and similar problems is usually not the way people like me solve such problems. It is a

    asked by URGENT PLZ on May 6, 2007
  91. Algebra

    on a canoe trip, Rita paddled upstream (against the current) at an average speed of 2 mi/hr relative to the riverbank. on the return trip downstream (with the current), her average speed was 3 mi/hr. find rita's paddling speed in still water and the speed

    asked by Amber on January 14, 2008
  92. Math please help!!!

    Julia is allowed to watch no more than 5 hours of television a week. So far this week, she has watched 1.5 hours. Write and solve an inequality to show how many hours of television Julia can still watch this week.

    asked by Anon on September 26, 2016
  93. Calculus

    The median value of a home in a particular market is decreasing exponentially. If the value of a home was initially $240,000, then its value two years later is $235,000. a) Write a differential equation that models this situation. Let V represent the value

    asked by Jamie on June 17, 2014
  94. physics

    A 5.3-kg block is pushed 2.3 m up a vertical wall with constant speed by a constant force of magnitude F applied at an angle of θ = 30° with the horizontal, as shown in the figure below. If the coefficient of kinetic friction between block and wall is

    asked by sherry on February 27, 2016
  95. Physics

    1. The problem statement, all variables and given/known data A 2.0-m measuring stick of mass 0.175 kg is resting on a table. A mass of 0.500 kg is attached to the stick at a distance of 74.0 cm from the center. Both the stick and the table surface are

    asked by Tyler on November 30, 2015
  96. Math

    A $15 item on sale for $12 is marked down what percent? 100 * $12 = $1200 $1200/$15 = $6000 Did I do the correct work, or is it this: 100 * $3 = $300 $300/$15 = $4500 Is the first work correct or is the second work correct?

    asked by Lauren on January 28, 2016
  97. Math

    One person can complete a piece of work in 8 days while other person can complete the same work in 4 days(if both works 10 hours per day). how many hours are required to complete the same work if both persons do it combined?

    asked by Tehseen on January 6, 2016
  98. Math (combination/permutation)

    Question 1: There are 12 students in a class. Find the number of ways that 12 studenets can take 3 different tests if 4 students are to take each test. Question 2 Find the number of ways 12 students can be partitioned into 3 teams A, B, C, so that each

    asked by Cynthia on December 30, 2010
  99. Trig

    Solve each equation for exact solutions over the interval [0,360)where appropriate. Round approximate solutions to the nearest tenth degree. Sin^2Theta=Cos^2Theta+1 My Work: Using double angle Identity I subtract 1 to other side therefore:

    asked by Ronald on April 27, 2016
  100. Computer Architecture

    A Silicon Valley company is looking to increase the performance of its workstations. Analysis of the applications that its customers are using has shown that the average response time breaks down into three main categories: CPU time, memory system time,

    asked by Abu A on October 15, 2013

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