1. business math

    . Jason’s credit card’s beginning unpaid balance for August is $2,000. During the August billing cycle he made a payment of $200 and used card to purchase $50 worth of grocery. Credit card charges 24% annual percentage rate and uses the unpaid balance
  2. Chemistry

    The given actual molarity of sulfuric acid was .08M. How do I calculate the absolute error and percentage error? Your question isn't complete? Did you experimentally measure the molarity? Or was it somthing else? If you measure the value experimentally,
  3. Math Pre-Cal (Exponential Functions)

    A house was valued at $110,000 in the year 1985. The value appreciated to $145,000 by the year 2005. -What was the annual growth rate between 1985 and 2005? Assume that the house value continues to grow by the same percentage. -What did the value equal in
  4. statistics

    Fewer young people are driving. In 1983, 87 percent of 19 year-olds had a driver's license. Twenty-five years later that percentage had dropped to 75 percent (University of Michigan Transportation Research Institute website, April 7, 2012). Suppose these
  5. math

    In an English test, Alvin scored 28 out of 40 marks. In a Mathematics test, he scored 36 out of 60 marks. (a) In which test did Alvin score better? (b) What was the percentage difference between Alvin's scores for both tests?
  6. Math

    In 500cmcube of alcohol solution the percentage of alcohol by volume is 80%. Find the volume of water that must be added to the solution so that the ratio of the volume of alcohol to that of water becomes 5:2? Please some one give me answer
  7. Chemistry

    A 2.00g sample of Fe3O4 is reacted with with 8.00g of O2 to produce Fe2O3. a) What mass of Fe2O3 will be produced? b) What mass of Fe2O3 will actually be produced if the percentage yield for reaction is 85% produced?
  8. General Chemistry

    A 0.484 g sample of impure NH4Br is treated with 25.00 mL of 0.2050 M NaOH & heated to drive off the NH3. The unreacted NaOH in the reaction mixture after heating required 9.95 mL of 0.0525 M H2C2O4 to neutralize. How many grams of NH4Br were in the
  9. Chemistry Math

    A 0.4671g sample containing sodium bicarbonate was titrated with HCL requiring 40.72ml. The acid was standardized by titrating 0.1876g of sodium carbonate FW 106mg/mmol requiring 37.86ml of the acid. Find the percentage of NAHO3 FW 84mg/mmol in the sample
  10. Chemestry

    A 5.000g sample of a dry mixture of potassium hydroxide, potassium carboate and potassium chloride is reacted with 0.100 L of 2.00-molar HCl solution. A 249.0 mL sample of dry carbon dioxide gas, measured at 22.0 degree Celsius and 740.0 torr, is obtained
  11. chemistry

    These are short and simple. :) I've included my answers, tell me if I am wrong please. CH3 is attached to a carbon on a pentane ring. Is the hybridization of the carbon sp3? NH connects a benzene ring to two benzene rings. Is the hybridization of the
  12. chemistry

    These are short and simple. :) I've included my answers, tell me if I am wrong please. CH3 is attached to a carbon on a pentane ring. Is the hybridization of the carbon sp3? NH connects a benzene ring to two benzene rings. Is the hybridization of the
  13. Chemistry

    I just wanted to be sure if my answers make any sense. Thank you; For the reaction of ammonia: N2(g) + 3H2(g) --> 2NH3(g) suppose equilibrium has been established. Explain how and why the position of equilibrium will shift in response to the following
  14. Statistics

    A planner wants to determine the percentage of students who will attend summer classes. She surveys 32 students and finds that 12 will return for summer classes. Construct a 90% confidence interval estimate for the proportion of students who will return
  15. AP Physics

    In a period of 2s, 4.8E23 nitrogen molecules strike a wall area of 8.6 cm^2. If the molecules move at 308 m/s and strike the wall head-on in a perfectly elastic collision, find the pressure exerted on the wall. The mass of one N2 molecule is 4.68E-26kg.
  16. please help

    In cell D21, type the formula to calculate the % change from January to February. That formula is: =(J18-E18)/ABS(E18). Format the result in the Percentage style and decrease the decimal places if necessary to round the result to the nearest whole percent
  17. Math

    Twenty-eight U.S. states prohibit all drivers from texting while driving. Nine other U.S. states prohibit only teen drivers from texting. Based on these numbers, in what percentage of U.S. states is it unlawful for teens to text while driving?
  18. Math

    Allie has an income which is five eighths that of Basil. Allie's expenses are one-half those of Basil and Allie saved 40% of his income. What is the percentage of his income that Basil saves? 25%?
  19. Chemistry - Correction

    I just wanted to be sure if my answers make any sense. Thank you; For the reaction of ammonia: N2(g) + 3H2(g) --> 2NH3(g) suppose equilibrium has been established. Explain how and why the position of equilibrium will shift in response to the following
  20. Maths

    Karen took 1hour 45mins to drive from Town A to Town B. She took another 25 mins drive from Town B to Town C. After that, she drove back to Town A. The journey from Town A to Town C and then back to Town A took 3h and 3mins. Find the percentage of time she
  21. math

    JAB Consulting has a $42,500 line of credit which charges an annual percentage rate of prime rate plus 5.5%. Their starting balance on May 1 was $7,800. On May 5 they borrowed $4,700. On May 13 the business made a payment of $2,000, and on May 19 they
  22. math

    Nick has a revolving department store credit card account with an annual percentage rate of 15%. Last month’s balance on the account was $423.78. During the current month, he made pur- chases totaling $123.42 and made a payment of $100. The store uses
  23. math lit

    The price of a apple increase from R2,40 to R3,72. What is the percentage increase in the price of the apple?? If an exam is 2 and a half hours long and its out of a total of 100 marks A)how many mintutes do you have in whic to complete the paper?? B) at
  24. Statistics

    The ratio of brown M&M’s in a bag is stated by the candy company to be 56%. If a random sample of 500 bags is selected, determine the probability that the sample proportion of random bags of M&M’s selected has a percentage of brown between 51% and 59%
  25. stats

    how to work this math problemAn archaeologist has 250 animal bone fragments from prehistoric site -of these 195 are white-tail deer bones. Construct the 90% confidence interval for the percentage of bone fragments from this site that are from white-tail
  26. Statistics

    A 2014 Gallup Poll of 1028 adults found that 216 thought abortion should be illegal in all circumstances, a decrease of 2 percentage points from the record high in 2009. We are 95% confident that between ___% and ___% of all adults thought abortion should
  27. Statistics

    A 2014 Gallup Poll of 1028 adults found that 216 thought abortion should be illegal in all circumstances, a decrease of 2 percentage points from the record high in 2009. We are 95% confident that between ___% and ___% of all adults thought abortion should
  28. maths

    a wholesellor allows a discount of 20% on the list price to a retailor . the retailor sells at 5% discount on the list price . if a customer paid ruppes38 for an article , what profit is made by the retailor ? find also the retailor's percentage profit for
  29. Stats need help

    Use the empirical rule to solve the problem. The systolic blood pressure of 18 yr. old women is normally distributed with a mean of 120 mmHg (millimeters of Mercury) and a standard deviation of 14 mmHg. What is the percentage of 18 yr. old women that have
  30. Chemistry

    A calcium sample weighting 607.4 mg was precipitated as oxalate and calcined calcium carbonate giving 246.7 mg. What the percentage of calcium in the sample? Calcium molecular weight: 40.078 g/mol CaCO3 molecular weight: 100 g/mol
  31. Pre AP Chemistry

    If I have a 1200 gram sample of a soft drink and it contains 180 grams of sugar, the percentage by mass of the sugar in the drink is 15%. If the sugar in the drink is sucrose (C12H22O11), how many grams of pure carbon can be obtained from decomposing all
  32. Math

    The systolic blood pressure of 18-year-old women is normally distributed with a mean of 120 mm Hg and a standard deviation of 12 mm Hg. What percentage of 18-year-old women have a systolic blood pressure that is within 3 standard deviations of the mean on
  33. Harmonics Problem--please help!

    A violin string has a length of 0.350 m and is tuned to concert G, with f = 392 Hz. Where must the violinist place her finger to play concert A, with f = 430 Hz? If this position is to remain correct to half the width of a finger (that is, to within 0.600
  34. question

    Mini Makers, a small manufacturer of action figures, is formulating a budget for next year's promotional activities. The company decides to budget $50,000 for promotional expenses (an amount equal to its nearest competitor's allotment.) Mini Makers is
  35. Harmonics Problem--please help!

    A violin string has a length of 0.350 m and is tuned to concert G, with f = 392 Hz. Where must the violinist place her finger to play concert A, with f = 430 Hz? If this position is to remain correct to half the width of a finger (that is, to within 0.600
  36. Math

    The interest rate on a second mortgage was % last year. This year the interest rate is %. How many percentage points has the interest rate increased?
  37. physics

    If the speed of the cart at the first photogate is 2.3 m/s, and the speed of the cart at the first photogate is 1.8 m/s, what is the percentage change in the speed of the cart (LEAVE OUT the % symbol)?
  38. Math

    The interest rate on a second mortgage was 8 3/4%last month. This month the interest rate is 11 1/8%. How many percentage points has the interest rate increased?
  39. maths for business Help!!!

    Jacson purchased a house for Birr 50,000. He made an amount of down payment and pay monthly Birr 600 to retire the mortage for 20 years at annual interest rate of 24% compounded monthly. Find mortage down payment interest charged percentage of down payment
  40. Macroeconomics

    Suppose the economy has been experiencing zero inflation and five percent unemployment for several years. The government decides to lower the unemployment percentage by generating some inflation. You need to do the following: 1)create a graph showing what
  41. statistics

    the birth of healthy, full term infants in the United States is nearly normally distributed. The mean weight is 3,500 grams, and the standard deeviation is 500 grams. (a) what percentage of the healthy newborns will weigh more than 3,250 grams? (b) what
  42. Managerial Economics

    I need assistance with the following question: A researcher estimated that the price elasticity of demand for automobiles in the United States is -1.2, while the income elasticity of demand is 3.0. Next year, U.S. auto makers intend to increase the average
  43. Chemistry

    someone help pls!! percentage of ethanol in the "blood" sample on a v/v basis is 0.0143% v/v. is the "blood" sample analysed over the limit for driving? (legal limit is 80mg alcohol per 100mL blood. assume the density of ethanol is 0.785g/mL and the
  44. Physical science

    In a recipe for lemonade it gives the ingredients as 1 cup of water,1.5 tablespoons lemon juice, plus sugar and salt.Not taking into account the sugar and salt, what is the concentration of lemon juice in the mixture as a percentage by volume? 16
  45. math

    Riding on a school bus are 20 students in 9th grade, 10 in 10th grade, 9 in 11th grade, and 7 in 12th grade. Approximately what percentage of the students on the bus are in 9th grade?
  46. math

    It has been estimated that 0.8% of a certain country's population are homeless. Now 0.8% is a small percentage, but there are approximately 313 million people in the country, and 313 million is a large number. Approximately how many people are homeless?
  47. statistics

    The number of hours that college students sleep on a week night is approximated by a normal curve with a mean of 7 hours and a standard deviation of 1.7 hours. Answer the question below using a z table: On a week night, what percentage of students sleep
  48. Statistics

    the heights of young women are approximately Normal with 65 inches and standard deviation 2.5 inches. The heights of men in the same age group have mean 70 inches standard deviation 2 inches. What percentage of women are taller than a man of average (mean)
  49. CHEM

    Hydrogen peroxide (H2O2) is decomposed according to the following reaction: 2H2O2 (l) ¡÷ 2H2O (l) + O2 (g) If 6.00 g of aquesous solution containing hydrogen peroxide was decomposed after heating, the mass of oxygen gas collected is 2.40 g, what is the
  50. statistics

    The body temp of normal healthy persons are normally distributed with a mean of 98.2 degrees F and a standard deviation od .62 degree F. If we define a fever to be a body temp above 100 degrees F, what percentage of normal and healthy person would be
  51. Chemistry

    Bromine has two isotopes, Br- 79 and Br- 81. The relative atomic mass of bromine is 79.9. CALCULATE THE PERCENTAGE of Br-79 atoms in a sample of bromine. PLease help i'm really stuck Someone said: The total for 79 and 81 is 100% and the total for fraction
  52. Chemistry Equation(again)

    What I wrote is the balanced ionic equation. The ++ are written as exponents and could be written as we usually do it as Cu^+2 + Zn ==> Zn^+2 + Cu. For the molecular equation, it is Cu(NO3)2 + Zn ==> Zn(NO3)2 + Cu So the ionic equation for adding
  53. Civics

    which would you most likely find a smaller a smaller amount of in a governments budget than in a personal household budget? a. the percent of total income that goes towards national defense and health care b. the percentage of people affected by the budget
  54. English

    State the meaning of the word expedite as it is used in the following sentence. Then, identify the context clue that you used to understand the meaning: definition clue, synonym, example clue, contrast clue, or inference clue. The majority of the elected
  55. Biology

    A student wishes to prepare 300 mL of 0.25 M sucrose. He puts 25.7 g of sucrose in a beaker and then adds 300 mL of dH2O. The total volume of the solution after the sucrose has been dissolved is 330 mL. a) What did he do wrong when preparing his solution?
  56. Business Stats

    In a recent survey in a Statistics class, it was determined that only 60% of the students attend class on Fridays. From past data it was noted that 98% of those who went to class on Fridays pass the course, while only 20% of those who did not go to class
  57. physics

    A sled is being pulled across a horizontal patch of snow. Friction is negligible. The pulling force points in the same direction as the sled's displacement, which is along the +x axis. As a result, the kinetic energy of the sled increases by 47.5 percent.
  58. Math

    A study of the amount of time it takes a mechanic to rebuild the transmission for a 1992 Chevrolet Cavalier shows that the mean is 8.4 hours and the standard deviation is 1.77 hours. Assume that a random sample of 40 mechanics is selected and the mean
  59. Math ---HELP!!!!!

    A study of the amount of time it takes a mechanic to rebuild the transmission for a 1992 Chevrolet Cavalier shows that the mean is 8.4 hours and the standard deviation is 1.77 hours. Assume that a random sample of 40 mechanics is selected and the mean
  60. statistics

    A study of the amount of time it takes a mechanic to rebuild the transmission for a 1992 Chevrolet Cavalier shows that the mean is 8.4 hours and the standard deviation is 1.77 hours. Assume that a random sample of 40 mechanics is selected and the mean
  61. science Help

    A long-haired cat (recessive trait s) is crossed with a heterocygous short-haired cat (dominant trait S). What percentage of their offspring will have long hair? A. 100 percent B. 50 percent C. 25 percent D. 0 percent Is the answer C?
  62. Statistics

    The probability of winning something on a single play at a slot machine is 0.29. After 6 plays on the slot machine, What is the probability of winning at least once? Write only a number as your answer. Round your answer to four decimal places (for example:
  63. Math

    The systolic blood pressures of a group of 18-year-old women are normally distributed with a mean of 120 mmHg and a standard deviation of 12 mmHg. What percentage of women in this group have a systolic blood pressure between 108 mmHg and 132 mmHg?
  64. PROBABILITY

    There are 100 patients in a hospital with a certain disease. Of these, 10 are selected to undergo a drug treatment that increases the percentage cured rate from 50 percent to 75 percent. What is the probability that the patient received a drug treatment if
  65. physics

    A projectile (mass = 0.269 kg) is fired at and embeds itself in a target (mass = 1.34 kg). (The target is initially stationary). The target (with the projectile in it) flies off after being struck. What percentage of the projectile's incident kinetic
  66. Math

    Say for example that you need to find out the number of people that need emergency housing for in a neighbourhood. would you multiply the population of the area by the total percentage of risk. ex. barnyard population 325 risk is 40% ... do you go 325 time
  67. science/chem

    calculate the percentage composition in NO2 Figure the mol mass of NO2 (atomic mass N + 2*atomic masss O) percent N= atomicmassN/molmassNO2 * 100 percent O= 2*atomicmassO/molmassNO2 *100
  68. science Help

    A long-haired cat (recessive trait s) is crossed with a heterocygous short-haired cat (dominant trait S). What percentage of their offspring will have long hair? A. 100 percent B. 50 percent C. 25 percent D. 0 percent Is the answer C?
  69. Science Help

    A long-haired cat (recessive trait s) is crossed with a heterocygous short-haired cat (dominant trait S). What percentage of their offspring will have long hair? A. 100 percent B. 50 percent C. 25 percent D. 0 percent Is the answer C?
  70. math

    Jerry grew 5 inches in 2003, and 2 inches more in 2004 before reaching his final height of 5 feet 10 inches . what percentage of his final height did his 2003-2004 growth represent?
  71. Physics

    A projectile (mass = 0.10 kg) is fired at and embeds itself in a target (mass = 2.11 kg). The target (with the projectile in it) flies off after being struck. What percentage of the projectile's incident kinetic energy does the target (with the projectile
  72. math

    The figure below is not drawn to scale. The ratio of the triangle ABC to the area of triangle DEC to the area of the triangle FGH is 7:5:3. If 20% of the area of triangle DEC is shaded, what percentage of the figure is unshaded?
  73. AP Chemistry

    The solubility of sodium nitrate is 32 grams in 50.0 grams of water at 60 degrees C. If 60 grams of potassium nitrate are mixed with 50.0 grams of water, determine the percentage of sodium nitrate that remains undissolved.
  74. math

    John who is an amateur golfer spends 3 hours every day practicing golf. What percentage of his waking hours does John spend practicing golf if he sleeps 8.5 hours a day?
  75. AP Chemistry

    The solubility of sodium nitrate is 32 grams in 50.0 grams of water at 60 degrees C. If 60 grams of potassium nitrate are mixed with 50.0 grams of water, determine the percentage of sodium nitrate that remains undissolved.
  76. Chemistry

    Asprin(acteyl salicylic acid) can be synthesized by reacting acetic anhydride with salicylic acid. Assume the reaction was run and 1.75 grams of a solid product was obtained. Recrystalization of the 1.75 g mixture yielded 1.50 g of asprin. a. What was the
  77. statistics

    5. A soft drink dispensing machine uses paper cups that hold a maximum of 12 ounces. The machine is set to dispense a mean of 10 ounces of the drink. The amount that is actually dispensed varies. It is normally distributed with a standard deviation of one
  78. health

    what three vitamins and minerals undergo the greatest percentage increase during pregnancy?1.vitamind,iron,folicacid 2.iron,folicacid,calcium 3.iron,folicacid,vitaminb6 4.vitamind,iron,calcium 5.iodide,iron,niacin
  79. Chemistry

    Phosphorous trichloride (PCl3) is produced from the reaction of white phosphorous (P4) and chlorine: P4(s) + 6Cl2(g) --> 4 PCl3(g) . A sample of PCl3 of mass 280.7 g was collected from the reaction of 70.86 g of P4 with excess chlorine. What is the
  80. Physics- hard problem

    A 14000 N automobile travels at a speed of 40 km/h northward along a street, and a 7000 N sports car travels at a speed of 62 km/h eastward along an intersecting street.(a) If neither driver brakes and the cars collide at the intersection and lock bumpers,
  81. chemistry

    Iron can be produced by the reduction of iron(III) Oxide by carbon monoxide: Fe2O3 + 3CO -> 2FE +3CO2 a) what maximum mass of CO2 could be produced from the complete reduction of 14.7g of Fe2O3? b) if 8.73g of CO2 gas was actually collected, what
  82. AP Biology

    I got a question that comes from the 1990 released test #61 that I'm completley lost on 61. In a population that is in Hardy-Weinberg equilibrium, the frequency of a recessive allele for a certain hereditary trait is 0.20. What percentage of the
  83. reading help

    Vocbulary Words: Assist Assume Bluntly Commission Competitors Disapprove Earnings Exasperated Extinguished Humiliating Patron Percentage Personnel Rectify Regardless Worthwhile Use each clue to write a vocabulary word. a. not disadvantageous but, b. not
  84. Physics

    A 15500 N automobile travels at a speed of 41 km/h northward along a street, and a 7000 N sports car travels at a speed of 65 km/h eastward along an intersecting street. a)If neither driver brakes and the cars collide at the intersection and lock bumpers,
  85. chemistry

    When iron(ii)hydroxide is mixed with phosphoric acid, iron(ii)phosphate precipitate results. b)if 3.2g of Fe(OH)² is treated with 2.50g of phosphoric acid, what is the limiting reagent and what is the reactant in access? c)How many grams of Fe³(PO⁴)²
  86. physics

    You have a box that contains 200 marbles. 99% of the marbles are green, the other 1% are white. How many green marbles would you have to remove from the box to reduce the percentage of green marbles to 98%?
  87. math

    the population of Ling is partly english and partly french.If 80% speak english and 70% speak french,what percentage speak both languages?
  88. statistics

    a) What is the standard deviation of the set of data? b) What raw score will have 15% of the data set above it? c) If I have a raw score of 21 what percentage of the scores, are below my score? 16, 16, 89, 76, 24, 45, 98, 20, 22, 28, 34, 35, 76, 67, 48, 37
  89. Calculus

    Estimate delta f using linear approximation F(x) = x^ (1/3)e^(x-1), a=1, delta x = 0.4 linear approximation for delta f = Error is = Percentage error is = please explain tburoughly
  90. Math

    The number, N, of people who have heard a rumor spread by mass media by time, t, is given by N(t)=a(1−e−kt). There are 6 million people in the population, who hear the rumor eventually. If 5% of them heard it on the first day, find the
  91. math/science

    If 0 is t when the year is 1982, what would be the value of t in 1990? How many years is that? From 1982 to 1992 the cost of the manufacturing a PC has decreased by about the same percentage each year. The cost, C (in dollars), in year t can be modeled by
  92. Calculus

    The number, N, of people who have heard a rumor spread by mass media by time, t, is given by N(t)=a(1−e−kt). There are 6 million people in the population, who hear the rumor eventually. If 5% of them heard it on the first day, find the
  93. Chem

    To what temperature in K must a variable volume container of helium gas be cooled to obtain a final volume of 0.182 L? The initial volume and temperature are 2.34 L and 314 K, respectively. The pressure and number of moles are fixed. You're supposed to us
  94. Chemistry

    To what temperature in K must a variable volume container of helium gas be cooled to obtain a final volume of 0.182 L? The initial volume and temperature are 2.34 L and 314 K, respectively. The pressure and number of moles are fixed. You're supposed to us
  95. Chemistry

    Last week we drew Lewis dot structures of azide (N31-), a crucial component in automobile collision safety airbags. During an impact, a sensor ignites a detonator cap that sets off the following rapid reaction: 2NaN3(s) → 2Na(s) + 3N2(g) Part A What
  96. chem/some1 check my work plz.

    2NH3(g)+3CuO(s)=N2(g)+3Cu(s)+3H2O(g) if 18.1grams of ammonia reacts with 90.4 grams of copper(II) oxide, which is the limitting reagent?? what is the theorectical yield of nitrogen gasd? if 8.52 g of N2 are formed, what is the % yield of nitrogn gas??
  97. civics

    which would you most likely find a smaller a smaller amount of in a governments budget than in a personal household budget? a. the percent of total income that goes towards national defense and health care b. the percentage of people affected by the budget
  98. Math

    The following table represents a grouped frequency distribution of the number of hours spent on the computer per week for students. What percentage of students used the computer between 7 and 14.9 hours per week? Round your answer to one decimal place, if
  99. Algebra

    In 2007, Donald's stock portfolio decreased in value by 25%. In 2008, his stock portfolio decreased in value by another 40%. What percentage gain is required in 2009 for Donald's stock portfolio to return to the value it had in the beginning of 2007?
  100. Math

    We believe that 77% of the population of all Business Statistics I students consider statistics to be an exciting subject. Suppose we randomly and independently selected 38 students from the population. If the true percentage is really 77​%, find