1. Math

    give examples of a rational number in fraction form. Write your rational number in its decimal form.

    asked by mikil on August 28, 2013
  2. math

    The length of a rectangle is 5 in. more than twice its width.? How do I find the width of the rectangle. duplicate post Divide the length by 2 it's going to be a decimal

    asked by Diana on July 27, 2006
  3. english

    is evil in humanity a social issue? if not, how can i turn it into one? or is there a social issue that is similar to evil in humanity.

    asked by aaa on June 19, 2016
  4. French

    Vous prenez la rue de Vaugirard a(with the accent) gauche jusqu'au boulevard Saint-Germain. Does it mean to take the road of Vaugirard and turn right on boulevard Saint-Germain or take the road Vaugirard which is on the right until you reach Saint-Germain?

    asked by Miche on October 15, 2007
  5. Statistics

    Find the 99% confidence interval for the difference between two means based on this information about two samples. Assume independent samples from normal populations. (Use conservative degrees of freedom.) (Give your answers correct to two decimal places.)

    asked by Casey on October 29, 2013
  6. Statistics

    Find the 99% confidence interval for the difference between two means based on this information about two samples. Assume independent samples from normal populations. (Use conservative degrees of freedom.) (Give your answers correct to two decimal places.)

    asked by Karly on October 30, 2013
  7. math check

    Find the 95% confidence interval for the difference between two means based on this information about two samples. Assume independent samples from normal populations. (Use conservative degrees of freedom.) (Give your answers correct to two decimal places.)

    asked by Glenn D on June 25, 2013
  8. Business Math

    Lane French had a bad credit rating and went to a local cash center. He took out a 113 loan payable in three weeks at 137. What is the percent of interest paid on this Loan? Do not round denominator before dividing. (Use Calendar year, Round your answer to

    asked by Vickie on June 5, 2012
  9. business Maths

    Lane French had a bad credit rating and went to a local cash center. He took out a $103 loan payable in five weeks at $123. What is the percent of interest paid on this loan? Do not round denominator before dividing. (Use calendar year. Round your answer

    asked by Ekanki on April 24, 2012
  10. business Maths

    Lane French had a bad credit rating and went to a local cash center. He took out a $103 loan payable in five weeks at $123. What is the percent of interest paid on this loan? Do not round denominator before dividing. (Use calendar year. Round your answer

    asked by Ekanki on April 24, 2012
  11. math

    Find the 95% confidence interval for the difference between two means based on this information about two samples. Assume independent samples from normal populations. (Use conservative degrees of freedom.) (Give your answers correct to two decimal places.)

    asked by Tracy on June 26, 2013
  12. Managerial Finance

    The real risk-free rate is 2.1%. Inflation is expected to be 2.2% this year, 3.95% next year, and then 3.05% thereafter. The maturity risk premium is estimated to be 0.05(t - 1)%, where t = number of years to maturity. What is the yield on a 7-year

    asked by SLW on September 24, 2011
  13. trig

    Two office towers are 43m apart. From the top of the shorter tower, the angle of elevation to the top of the taller tower is 26o while the angle of depression to the base is 51o. Determine the height of each tower and round your answers to one decimal

    asked by max on November 8, 2011
  14. MATH

    oN A SPECIAL SCALE IN THR SCIENCE LAB, SCOYTT WEIGHED SAMPLES OF DIFFERENT KINDS OF SOIL. SAMPLE A WEIGHED 3 OUNCES. SAMPLE B WEIGHED 814 THOUSANDTHS OF AN OUNCE MORE THAN SAMPLE A. WHAT DECIMAL SHOULD SCOTT USE TO RECORD THE WEIGHT OF SAMPLE B?

    asked by LANA on September 16, 2009
  15. please help

    In a study about children’s pocket money, two samples of schoolchildren were asked how much money they received each week. In one sample, of size 25, the mean is £6.00. In the other sample, of size 43, the mean is £9.21. Calculate the mean based on the

    asked by Jay on May 18, 2016
  16. Physics waves

    I am stuck with both of these questions. Thanks in advanced! 1. If one tone has a frequency of 110 Hz and another tone is played near it with a tone of 113 Hz, the beat frequency is ___ Hz 2. A standing wave has 3 nodes in a string 20 m long. The

    asked by Liz on April 20, 2014
  17. Algebra

    Question Part Points The diameter of an electric cable is normally distributed, with a mean of 0.6 inch and a standard deviation of 0.02 inch. What is the probability that the diameter will exceed 0.62 inch? (You may need to use the standard normal

    asked by Grizz on June 15, 2013
  18. 8th Grade Algebra-Radicals:Answer Check

    Change each decimal to a fraction in lowest terms. 1) 0.4242.... Answer: 14/33 2)0.58 Answer: 29/50 3)0.14 (Repeating sign over both numbers) Answer: 14/99 Write each expression in simplest form. ( means that it is inside a square root. 1. (54 Answer: 3(6

    asked by Joy on January 14, 2009
  19. Sixth Grade Simplest Form

    Im having a hard time trying to solve this problem. Can someone please help me? Marcial found a recipe for fruit salad that he wanted to try to make for his birthday party. He decided to triple the recipe. 3 1/2 cups thinly sliced rhubarb 15 seedless

    asked by SARA on September 17, 2014
  20. sat essay!

    question: what are your thoughts onthe idea that television has turned out to isolate people instead of bringing them together. my essay; please evaluate! to say that television has turned out to isolate people instead of bringing them together holds true

    asked by mahwish on December 20, 2010
  21. APR Problem

    Joshua borrowed $1,900 for one year and paid $95 in interest. The bank charged him a service charge of $22. If Joshua paid the $1,900 in 12 equal monthly payments, what is the APR? (Enter your answer as a percent rounded to 1 decimal place.) So, I got

    asked by MM on March 9, 2017
  22. geometry

    correct me if I'm wrong please. 7. what is the equation of the line which passes through c(2,3) and has a slope m =1/2? a.)x-2y=-4

    asked by Anon on March 2, 2011
  23. Math

    1. Find the slope of the line that passes through the points (-1, 2), (0, 5). 2. Suppose y varies directly with x, and y = 15 and x = 5. Write a direct variation equation that relates x and y. What is the value of y when x = 9? 3. Write an equation in

    asked by PicturesDon'tChangeThePeopleInsideOfThemDo on December 13, 2017
  24. physics

    During a track event two runners, Mary, and Alice, round the last turn and head into the final stretch with Mary a distance d = 4.0 m in front of Alice. They are both running with the same speed of v0= 7.0 m/s. When the finish line is a distance L= 45.0 m

    asked by tini on September 11, 2013
  25. English

    Now since I have corrected those errors, and change some stuff in the 2nd par. could u go back and check my whole paper for spelling, commons, semi colon, period, subjust verb agreement,and make sure that everything is correct. I would really appreciate

    asked by Angel on November 11, 2009
  26. math

    You draw one card at random from a shuffled deck of 52 playing cards. The deck has four 13−card suits (diamonds, hearts, clubs, spades). The card is a club or a spade. Find the probability of this event. Write each answer as a fraction in simplest form,

    asked by PleaseHelpCheckMyAnswers on March 23, 2016
  27. high school

    Use the digits in the year 2010 and the operations +, -, x, ÷, sqrt (square root), ^ (raise to a power), and ! (factorial) — along with parentheses, brackets, or other grouping symbols — to write expressions for the counting numbers 1 through 100.

    asked by Sama on December 18, 2009
  28. Algebra - Middle School

    Use the digits in the year 2010 and the operations +, -, x, ÷, sqrt (square root), ^ (raise to a power), and ! (factorial) — along with parentheses, brackets, or other grouping symbols — to write expressions for the counting numbers 1 through 100. All

    asked by Sama on December 18, 2009
  29. English

    just can't figure these sentences out. have to rewrite these sentences, correcting the problem of incorrect omission.? 1. A liberal arts background is excellent for such professions as lawyers and doctors. 2. American colleges consistently produce more

    asked by Ann on March 19, 2011
  30. English

    I just can't figure these sentences out. have to rewrite these sentences, correcting the problem of incorrect omission.? 1. A liberal arts background is excellent for such professions as lawyers and doctors. 2. American colleges consistently produce more

    asked by Ann on March 18, 2011
  31. Math

    A two-player game is played with two piles of stones, with sizes m,n. On a player's turn, that player can remove any positive integer number of stones from one pile, or the same positive integer number of stones from each pile. A player loses when they are

    asked by Andy on August 13, 2013
  32. calculus

    Find the points at which y = f(x) = x8−13x has a global maximum and minimum on the interval 0 ≤ x ≤ 3.7. Round your answers to two decimal places. Global Maximum: (x,y) = (,) Global Minimum: (x,y) = (,)

    asked by Erika on November 1, 2010
  33. physics ( please help me)

    Ice hockey star Wayne gretzky is skatin at 13.0 m/s^1 towards a defender, who is in turn skating at 5.0 m/s^-1 toward gretzky.gretzky's weight is 756 N, that of the defender is 900 N. Immediately after the collision. gretzky is moving at 3.00 m/s^-1 in his

    asked by taylor on April 3, 2012
  34. Biochemistry

    Hello guys, I just wanted some clarification of these question. 1. A sequence of amino acids in a certain protein is found to be -Ser-Pro-Gly-Gly-. The sequence is most probably part of a 1. a-helix 2.b-turn (b-bend) 3. parallel b-pleated sheet 4. a-sheet.

    asked by George on November 2, 2009
  35. Physics

    A cirular coil of 19 turns and radius 10.2cm surrounds a long solenoid of radius 2.6cm and 1.00x103 turns per meter. The two are oriented so that the axis of the coil and the axis of the solenoid are parallel and the center of the coil is at the center of

    asked by Matt on March 12, 2011
  36. physics

    A runner is jogging at a steady 2.3 km/hr. When the runner is 8.4 km from the finish line, a bird begins flying from the runner to the finish line at 9.2 km/hr (4 times as fast as the runner). When the bird reaches the finish line, it turns around and

    asked by argelia on September 5, 2012
  37. calculus

    The point P(4, −2)lies on the curve y = 2/(3 − x). (a) If Q is the point(x, 2/(3 − x)),use your calculator to find the slope mPQ of the secant line PQ (correct to six decimal places) for the following values of x. 1) 3.9 mPQ= 2) 3.99 mPQ= 3)3.999

    asked by student on August 29, 2012
  38. calc

    The point P(4, −2)lies on the curve y = 2/(3 − x). (a) If Q is the point(x, 2/(3 − x)),use your calculator to find the slope mPQ of the secant line PQ (correct to six decimal places) for the following values of x. 1) 3.9 mPQ= 2) 3.99 mPQ= 3)3.999

    asked by someone please help me with this!!!! on August 29, 2012
  39. Math

    The question says express each repeating decimal as a fraction: 5.23232323 This is my work but my answer doesn't seem right: 100x= 523.23232323 - 10x= 52.23232323 90x= 470.909090 / 90x. \90x x= 5.23232323 What am I doing wrong? And how am I suppose to know

    asked by Diana on September 3, 2015
  40. statistics

    8.value: 10.00 points The fracture strength of a certain type of manufactured glass is normally distributed with a mean of 509 MPa with a standard deviation of 17 MPa. (a) What is the probability that a randomly chosen sample of glass will break at less

    asked by Anonymous on May 2, 2015
  41. math

    1) An antique dresser was purchased for $7500 in 2005. The dresser increases in value by 9% per year. Find the value of the dresser in 2025. 2) a) Find the slope of the secant to the curve f(x) = 0.25(4)^(x) - 2 between: p1) x=0 and x = 1 p2) x=0 and x=0.5

    asked by Jonathan on April 2, 2013
  42. Precalc Math

    The question says express each repeating decimal as a fraction: 5.23232323 This is my work but my answer doesn't seem right: 100x= 523.23232323 - 10x= 52.23232323 90x= 470.909090 / 90x. \90x x= 5.23232323 What am I doing wrong? And how am I suppose to know

    asked by Diana on September 3, 2015
  43. Math

    There are 35 marbels in a bag: 9 blue marbels, 8 green marbels, 4 red marbels, 8 white marbels, and 6 yellow marbels. Find P(red). Write the probability as a fraction in simplest form, a decimal, and a percent. A. 4\31,0.129,12.9% B. 4\35,0.114,11.4% C.

    asked by Kanani on April 8, 2015
  44. Physics

    I'm not sure of where to begin with this question? completely lost Two cyclists start out on the same trail together that is overall 20km long. The first cyclist completes the entire trail and is traveling at a constant 20 km/hr for the away part of the

    asked by Anonymous on December 23, 2015
  45. math

    A game show contestant is offered the option of receiving a computer system worth $2300 or accepting a chance to win either a luxary vacation worth $5000 ora boat worth $8000.If the second option is chosen the contestant"s probability of winning the

    asked by Andrew on November 20, 2012
  46. physics

    There is a clever kitchen gadget for drying lettuce leaves after you wash them. It consists of a cylindrical container mounted so that it can be rotated about its axis by turning a hand crank. The outer wall of the cylinder is perforated with small holes.

    asked by Tyler on January 26, 2017
  47. history

    As American colonists questioned British rule, public discussion focused on topics such as colonial independence and individual rights. In turn, literature from the American Revolutionary period often reflected important political and social themes,

    asked by scooby on November 6, 2016
  48. physics

    There is a clever kitchen gadget for drying lettuce leaves after you wash them. It consists of a cylindrical container mounted so that it can be rotated about its axis by turning a hand crank. The outer wall of the cylinder is perforated with small holes.

    asked by Angela on October 23, 2010
  49. Physics

    There is a clever kitchen gadget for drying lettuce leaves after you wash them. It consists of a cylindrical container mounted so that it can be rotated about its axis by turning a hand crank. The outer wall of the cylinder is perforated with small holes.

    asked by Angela on October 23, 2010
  50. Ch. 5 physics help!

    There is a clever kitchen gadget for drying lettuce leaves after you wash them. It consists of a cylindrical container mounted so that it can be rotated about its axis by turning a hand crank. The outer wall of the cylinder is perforated with small holes.

    asked by Hannah on February 11, 2011
  51. English

    1. Stop at the red light. 2. Stop on the red light. (Which preposition should we use?) 3. Turn slightly right. 4. This is a one-way street. (Are both grammatical?) 5. Fill it up with regular unleaded, please. 6. Fill her up with regular, please. 7. Fill it

    asked by rfvv on April 4, 2014
  52. MATH

    The value V of a machine t years after it is purchased is inversely proportional to the square root of t+2. The initial value of the machine is $10,000. Find the rate of depreciation when t=5 . Round your answer to two decimal places. A. -381.80 PER YEAR

    asked by Roger on September 19, 2011
  53. Calculus

    This is another textbook number that doesn't have the solution and I can't figure it out. Any tips would be greatly appreciated. For each of the plane surfaces, calculate the exact surface area. (Answer in fractions) (a)The surface composed of all surfaces

    asked by Paul on August 9, 2012
  54. math

    Mrs walkers ordered 10 pizza's for a party . Each pizza is cut into 8 slices the list below show the fraction of each pizza that was left after the party. 3/8,4/8,4/8,5/8,6/8,7/8,2/8,4/8,5/,3/8 1.Make a line plot of the fractions of pizzas that were left.

    asked by gautam on April 23, 2014
  55. math

    When simplifying a rational fraction, why do you need to factor the numerator and the denominator? Include two examples! to get like terms Can you explain a little more? When you factor then you can cancel like terms Example: 12/3 (3)(4) ------- = 4/1 =4 3

    asked by jenn on June 15, 2005
  56. Math check

    write the decimal as a fraction or a mixed number in simplest form 2.67 2.67/1× 100/100 = 267/100 267/100 = 2 67/100?

    asked by Gio on December 4, 2013
  57. Physics

    A runner is jogging at a steady 6.2 km/hr. When the runner is 4.9 km from the finish line, a bird begins flying from the runner to the finish line at 24.8 km/hr (4 times as fast as the runner). When the bird reaches the finish line, it turns around and

    asked by Joseph on August 20, 2015
  58. Physics

    Rotating cylinders are not just physical abstractions: for example, they can turn a flow of the air, thus creating lift as the airplane wings. Historically people have even used rotating cylinders to power ships (although with little efficiency). NASA

    asked by Steven on August 5, 2013
  59. In Need of a Mathmetician!!!!

    An ant of negligible dimensions start at the origin (0,0) of the standard 2-dimensional rectangular coordinate system. The ant walks one unit right, then one-half unit up, then one-quarter unit left, then one-eighth unit down, etc. In each move, it always

    asked by Anonymous on December 3, 2007
  60. Physics

    A frustrated hockey player, at rest on a frictionless ice rink, throws his stick into the crowd. Since you don’t normally go to hockey games, you decide to turn this into a physics problem and calculate the mass of this player. You observe that the stick

    asked by Juhi on April 22, 2016
  61. chemistry

    2 C6H6 + 15 O2 → 12 CO2 + 6 H2O ΔHrxn = 6542 kJ/rxn If 8.88 g of C6H6 (FW = 78.114 g/mol) is burned and the heat produced from the reaction is used to heat 6354 g of water at 22.5o C, what is the final temperature of the water (swater = 4.184 J/g C)?

    asked by kenzie on June 15, 2018
  62. MATH HELP PLEASE

    Albert is saving up money for a down payment on a house. He currently has $4718, but knows he can get a loan at a lower interest rate if he can put down $5323. If he invests the $4718 in an account that earns 5% annually, compounded quarterly, how long

    asked by Tim on October 9, 2015
  63. Algebra

    Albert is saving up money for a down payment on a house. He currently has $4718, but knows he can get a loan at a lower interest rate if he can put down $5323. If he invests the $4718 in an account that earns 5% annually, compounded quarterly, how long

    asked by Tim on October 9, 2015
  64. math

    The population of bacteria in one cubic centimeter of the blood of a sick person has been modeled by the function P(t) = 115 t(0.88^t) where t is the time, in days, since the person became ill. Estimate how fast the population is changing 14 days after the

    asked by lin on October 6, 2010
  65. finance

    You want to have $2 million in real dollars in an account when you retire in 30 years. The nominal return on your investment is 8 percent and the inflation rate is 5.3 percent. What real amount must you deposit each year to achieve your goal? (Do not round

    asked by jake on March 14, 2015
  66. Algebra

    Alfred is saving up money for a down payment on a house. He currently has $4185, but knows he can get a loan at a lower interest rate if he can put down $5019. If he invests the $4185 in an account that earns 4.1% annually, compounded quarterly, how long

    asked by Tim on October 9, 2015
  67. Statistics

    Air America has a policy of booking as many as 15 persons on an airplane that can seat only 14. (Past studies have revealed that only 86% of the booked passengers actually arrive for the flight.) Find the probability that if Air America books 15 persons,

    asked by Sarah on June 3, 2013
  68. Statistics

    Air America has a policy of booking as many as 15 persons on an airplane that can seat only 14. (Past studies have revealed that only 86% of the booked passengers actually arrive for the flight.) Find the probability that if Air America books 15 persons,

    asked by Sarah on June 3, 2013
  69. physics

    Here is the problem and answers. how do i reach the answer? A car at the Indianapolis-500 accelerates uniformly from the pit area, going from rest to 325 km/h in a semicircular arc with a radius of 198 m. Determine the tangential acceleration of the car

    asked by hopsy on January 18, 2011
  70. Intermediate Algebra

    A parcel delivery service has contracted you to design an open box with square base length x cm and height y cm has a volume of 3600 cubic cm. Find the total surface area in terms of x and y. Also determine the dimension for minimum surface area (round

    asked by Ann on October 10, 2015
  71. Math please help thnks

    A silver dollar is dropped from the top of a building that is 1398 feet tall. Use the position function below for free-falling objects. (Round your answers to 3 decimal places.) s(t) = -16t2 + v0t + s0 (a) Determine the position and velocity functions for

    asked by Anonymous on February 15, 2012
  72. Calculus

    A solid is formed by adjoining two hemispheres to the ends of a right circular cylinder. An industrial tank of this shape must have a volume of 1600 cubic feet. The hemispherical ends cost twice as much per square foot of surface area as the sides. Find

    asked by Emily on November 3, 2016
  73. math

    Transcriptionist B is a full-time employee earning $10.00 per hour and an annual salary of $20,800. He transcribes 900 lines per day for a total of 234,000 lines per year. What is the unit medical transcription labor cost for transcriptionist B? Round to

    asked by Anonymous on August 11, 2014
  74. Calculus

    A solid is formed by adjoining two hemispheres to the ends of a right circular cylinder. An industrial tank of this shape must have a volume of 1600 cubic feet. The hemispherical ends cost twice as much per square foot of surface area as the sides. Find

    asked by Emily on November 3, 2016
  75. Science

    Can sound exist in a vacuum? No Yes...my hoover is loud when I turn it on! Ignore Eddie's remark. His Hoover is not in a vacuum. It only creates a partial volume inside itself. Since sound is produced by the movement of molecules, and there are no

    asked by Michael on May 16, 2007
  76. physics

    A student drives a moped along a straight road as described by the velocity versus time graph in the figure. The divisions along the horizontal axis represent 1.5 s and the divisions along the vertical axis represent 4.5 m/s. Sketch this graph in the

    asked by carlton on September 23, 2012
  77. physics

    A car initially traveling eastward turns north by traveling in a circular path at uniform speed as in the figure below. The length of the arc ABC is 210 m, and the car completes the turn in 38.0 s. (a) What is the acceleration when the car is at B located

    asked by carlton on October 25, 2011
  78. physics

    A car initially traveling eastward turns north by traveling in a circular path at uniform speed as in the figure below. The length of the arc ABC is 210 m, and the car completes the turn in 38.0 s. (a) What is the acceleration when the car is at B located

    asked by carlton on October 25, 2011
  79. science

    A 25mL solution of nitric acid was placed in a flask and a few drops of phenolphthalein were added. Dilute sodium hydroxide was added until the indicator changed colour. It was found that 28mL of the alkali was used. What colour was the solution in the

    asked by Stanley on October 22, 2014
  80. science

    A viaduct is being re-levelled by using a jackscrew with a pitch of 5mm. The mass of the top slab of the viaduct is 20 tonnes (20000kg) and its length is 40m. The lever arm used to turn the jackscrew is 60 cm long. Calculate the effort force to be applied

    asked by christine on September 2, 2010
  81. Physics

    A viaduct is being re-levelled by using a jackscrew with a pitch of 5mm. The mass of the top slab of the viaduct is 20 tonnes (20000kg) and its length is 40m. The lever arm used to turn the jackscrew is 60 cm long. Calculate the effort force to be applied

    asked by Mia on September 2, 2010
  82. Physics

    A viaduct is being re-levelled by using a jackscrew with a pitch of 5mm. The mass of the top slab of the viaduct is 20 tonnes (20000kg) and its length is 40m. The lever arm used to turn the jackscrew is 60 cm long. Calculate the effort force to be applied

    asked by Mia on September 2, 2010
  83. physics

    A viaduct is being re-levelled by using a jackscrew with a pitch of 5mm. The mass of the top slab of the viaduct is 20 tonnes (20000kg) and its length is 40m. The lever arm used to turn the jackscrew is 60 cm long. Calculate the effort force to be applied

    asked by jenny on September 2, 2010
  84. simple question

    If an answer is to be 2 decimal places and the answer is 244.0983 would that make it 244.00 or 244.10 not sure???

    asked by DeeDee7 on June 14, 2013
  85. maths

    the mass of a boy is 36.1kg when rounded off to 1 decimal place. If his mass is less than 36.1kg, what is his possible mass?

    asked by Joel on July 25, 2011
  86. Math

    decimal notation for 19% is 0.19 right? fraction notation for 38%is 19/50 right? percent notation for 0.382 is 38.2% right? all are correct, i believe correct

    asked by Guy--again on February 27, 2007
  87. Chemistry

    What is the pH of a buffer solution that is made by adding 21.0 grams of sodium fluoride to 1.00 Liter of 0.15M hydrofluoric acid? (see the Table above for the Ka of hydrofluoric acid; calculate the pH to 2 decimal places) hint: you will have to find the

    asked by D.J. on June 18, 2013
  88. math

    Payments of $1690 at the end of every six months will pay off the balance owed on a loan in 9.5 years. If the interest rate on the loan is 9.9% compounded semiannually, what is the current balance on the loan? (Do not round intermediate calculations and

    asked by aaa on April 9, 2017
  89. chemistry

    What is the pH of a buffer solution that is made by adding 21.0 grams of sodium fluoride to 1.00 Liter of 0.15M hydrofluoric acid? (see the Table above for the Ka of hydrofluoric acid; calculate the pH to 2 decimal places) hint: you will have to find the

    asked by dennis on June 16, 2013
  90. Algebra

    Adam kicks the football in his backyard. The path of the football when kicked can be represented by the quadratic function y = - 16{x^2} + 85x where x is the horizontal distance (in feet) and y is the height (in feet). How far does Adam kick the football?

    asked by Zyere on December 17, 2014
  91. chemistry

    What is the pH of a buffer solution that is made by adding 21.0 grams of sodium fluoride to 1.00 Liter of 0.15M hydrofluoric acid? (see the Table above for the Ka of hydrofluoric acid; calculate the pH to 2 decimal places) hint: you will have to find the

    asked by Dennis on June 17, 2013
  92. Math

    A street light is at the top of a 17 ft tall pole. A woman 6 ft tall walks away from the pole with a speed of 8 ft/sec along a straight path. How fast is the tip of her shadow moving when she is 30 ft from the base of the pole? Must be accurate to fifth

    asked by Leah on October 6, 2014
  93. statistics

    the quality control inspector of a production plant will reflect a batch of syringes if two or more defectives syringes are found in a random sample of ten syringes taken from the batch of two percent defective syringes.what is the probability that the

    asked by gaio on December 8, 2010
  94. statistics

    I don't know where to start with this one. What is the formula and how do I go about answering this? Question: If one of the 255 subjects is randomly chosen, what is the probability that the person prefers orange juice, given they are over 40? Round your

    asked by Looking for someone to check my answer on March 16, 2010
  95. math

    i don't get how to do this problem mrs. sue please help how would you convert the repating nonterminating decimal to a fraction? explain the process as you solve the problem/0.1515... remember to show all of the steps that you use to solve the problem how

    asked by kathy on October 25, 2014
  96. statistics

    Can someone please tell me how I miss this, I added them up 29 and divided by 8 and came up with 3.625. Below is the question. Please don't send me to other sites and just explain why it is wrong. The number of children, x, belonging to each of eight

    asked by Sue on May 24, 2013
  97. chemistry

    A 25 mL solution of nitric acid was placed in a flask and a few drops of phenolphthalein were added. Dilute sodium hydroxide was added util the indicator changed colour. It was found that 28 mL of the alkali was used. (a) What colour was the solution in

    asked by Shane on August 8, 2014
  98. science

    If the student opened the bag after the above experiment, what would happen to volume of gas inside? A. The volume of gas in the bag will stay the same. B. the volume of gas in the bag will be decrease. C. The volume of gas in the bag will be increase. D.

    asked by Paul on January 31, 2014
  99. Chemical Engineering: Raoult's Law

    A binary mixture of benzene and styrene is kept in a closed vessel at equilibrium such that both liquid and vapor phases co-exist. The total amount of moles in the vessel is 100. The total moles of benzene that is distributed in the liquid and vapor phases

    asked by Silas on November 18, 2012
  100. Thermo

    Argon in a rigid tank is heated from an initial state of 50 °C, 2 bar and 2m ³ to a final pressure of 8 bar. Determine the final temperature in °C to 2 decimal places. Argon cp=0.5203 kJ/kgK cv=0.3122 kJ/kgK

    asked by Zz on December 3, 2017