Popular questions and responses by Cindy
  1. MATH

    An urn contains 8 pink and 7 red balls. 6 balls are randomly drawn from the urn in succession, with replacement. That is, after each draw, the selected ball is returned to the urn. What is the probability that all 6 balls drawn from the urn are pink? Round

    asked on November 30, 2012
  2. Math

    Polluted water flows into a pond. The concentration of pollutant in the pond at the t minutes is modelled by the equation c(t)= 9-90,000(1/10000+3t), where c is measured in kilograms per cubic metre. a) When will the concentration of pollutant in the pond

    asked on October 25, 2017
  3. Math Analysis

    what are the two critical points for r=4cos( 4(theta)) and its symmetries. As well as for r=2+2sin(theta)?

    asked on February 23, 2013
  4. Chem

    Copper(II) fluoride contains 37.42% F by mass. Use this % to calculate the mass of fluorine in grams contained 28.5 g of copper (ii) fluoride

    asked on October 16, 2013
  5. read

    1.Mr. Collins says he is proposing to Elizabeth because A. Elizabeth personality will displease lady Catherine B.Elizabeth has shown her affection for him C. he knows Elizabeth will inherit a lot of money D. as the heir, he feels responsible for the

    asked on April 13, 2017
  6. Algebra

    For a nonsmoker, the biological half-life of theophylline is 8 hours. Find the amount of the drug retained in a nonsmoker's system 18 hours after taking a one-unit dose. (Round your answer to three decimal places.)

    asked on March 27, 2016
  7. geometry

    A triangle has side lengths of 18 cm, 80 cm, and 81 cm. Classify it as acute, obtuse, or right

    asked on December 14, 2011
  8. Algebra

    Find the next three terms in the sequence? -6,5,16,17 A 38,49,60*** B 37,47,57 C 36,45,54 D 36,46,57 3 What are the first four terms of the sequence represented by the expression n(n-1)-5? A -7,-5,-3,1 B -5,-10,-15,-20 C 0,2,6,12 D -5,-3,1,7*** 6.Given the

    asked on April 10, 2018
  9. physics

    A garage lift has input and output circular pistons with diameters of 1 cm and 45 cm respectively. The lift is used to hold up a car with a weight of 1.7×103 N. What is the force on the input piston and what pressure is applied to the input piston

    asked on January 12, 2012
  10. geometry

    Find the image of O(–2, –1) after two reflections, first across the line y = –5, and then across the line x = 1. (1 point)

    asked on December 16, 2011
  11. physics

    A rectangular loop of wire is placed next to a straight wire, as shown in Fig. 20–55. There is a current of 3.5 A in both wires. Determine the magnitude and direction of the net force on the loop

    asked on October 18, 2016
  12. math

    You are paid $8.55/hr at your part-time job. You work 10 hours per week. You are considering working a part-time job for $6.25/hr, and it pays tips. You will earn an average of $3.00/hr in tips. If you work the same 10 hours at the new job, how much more

    asked on April 9, 2012
  13. Math

    A committee of 5 people is to be formed from a group of 7 women and 4 men. How many possible committees can be formed if: the committee then must chose a president and a vice president, how many ways could these two positions be chosen? why is it

    asked on May 25, 2016
  14. math

    how do i translate: the sum of a number times 5 and 29 is at most 23 into an inequality sentence number

    asked on January 14, 2016
  15. Science

    Use Newton’s first law of motion to explain how wearing a seat belt in a moving car could help prevent injury.

    asked on April 7, 2014
  16. physc

    the disadvantages of group intelligence tests include thats: a. all test takers must wait until all registered individuals arrive. b. proctors are often insonsistent and allow some test takers a longer time to respond or to take testing breaks. c. some

    asked on July 6, 2012
  17. Chemistry

    What is the molality of a glucose solution prepared by dissolving 18.0g of glucose, C6H12O6 in 125g of water? A)0.000794 B)0.144 C)0.699 D)0.794 Molality is the number of moles of solute per kilogram of solvent. Because the density of water at 25°C is

    asked on April 27, 2007
  18. Chemistry

    For the following chemical reaction, how many moles of lead(ii)iodide (PbI2) will be produced from 8 mol of potassium iodide (KI)?

    asked on September 23, 2015
  19. physics

    An SUV with a mass of 1.80×103 kg is travelling eastbound with a speed of +15.0 m/s, while a compact car with a mass of 9.00×102 kg is travelling westbound at -15.0 m/s. The vehicles collide head-on and stick together. What is the speed of the wreck

    asked on July 29, 2013
  20. physics

    A rotating door is made from four rectangular sections, as indicated in the drawing. The mass of each section is 86 kg. A person pushes on the outer edge of one section with a force of F = 61 N that is directed perpendicular to the section. Determine the

    asked on May 31, 2012
  21. Physics

    A student decides to move a box of books into her dormitory room by pulling on a rope attached to the box. She pulls with a force of 130 N at an angle of 30.0° above the horizontal. The box has a mass of 24.0 kg, and the coefficient of kinetic friction

    asked on March 8, 2012
  22. geometry

    The area of a regular octagon is 35 cm2. What is the area of a regular octagon with sides six times as long? so do you times this by 6?

    asked on January 12, 2012
  23. geometry

    What translation rule can be used to describe the result of the composition of (x, y) (x – 9, y – 2) and (x, y) (x + 1, y – 2)? I am stuck can you please explain

    asked on December 16, 2011
  24. geometry

    Write the equation for the vertical line that contains point E(8, 6).

    asked on December 1, 2011
  25. Chemistry

    a)What mass of water is produced from the complete combustion of 2.30×10−3 g of methane? b)What mass of oxygen is needed for the complete combustion of 2.30×10−3 g of methane? This is the unbalanced equation given: CH4+O2->CO2+H2O

    asked on September 21, 2010
  26. Mathematics

    A recipe for cookies requires 2/3 cup of butter.Rama wants to make 3/4 of the many cups of butter should rama use to make the cookies?

    asked on April 30, 2020
  27. Economics

    Assume that a local bank sells two services – checking accounts and ATM card services. Mr. Done That is willing to pay $8 a month for the bank to service his checking account, and $10 a month for unlimited use of his ATM card. Ms. Been There wants to pay

    asked on May 2, 2015
  28. MATH

    20% books in the library is fiction books and the rest were non fiction books.when 30% of the fiction book and 15% of non fiction books were borrowed,there were 1132 books left.How many books was borrowed?

    asked on September 26, 2013
  29. Math/ Algebra 2

    How many different ways can the letters in the word COMBINATIONS be arranged if the letter C is first and the letter S is last? Thank you in advance ^^

    asked on April 20, 2012
  30. geometry

    Find the area of a regular pentagon with a side of 6 ft. Give the answer to the nearest tenth. ok can't remember how to do this

    asked on January 12, 2012
  31. geometry

    totally stuck can someone help please P P'(–8, –3) for the glide reflection where the translation is (x, y) (x –2, y –5) and the line of reflection is y = –x. Find the coordinates of P.

    asked on December 19, 2011
  32. geometry

    The length of the hypotenuse of a 30°-60°-90° triangle is 12. Find the perimeter.

    asked on December 14, 2011
  33. geometry

    ok what is the value if x (2x+24) degrees on the top of the lines that form a X and on the other side of the angle is 142 Degrees.. I know you have to have 180 degrees but those x's confuse me. I have this figure out and narrowed down to two answers....

    asked on November 28, 2011
  34. math

    use >

    asked on March 27, 2011
  35. organic chemistry

    write a balanced equation for the reaction of benzoic acid with 3 M sodium hydroxide solution

    asked on May 27, 2009
  36. Geometry

    What is the measure of a complement and supplement of an angle measuring 6.3 degrees

    asked on January 28, 2019
  37. Psychological Statistics

    TRUE OR FALSE. The Pearson correlation between X1 and Y is r = 0.50. When a second variable, X2, is added to the regression equation, we obtain R2 = 0.60. Adding the second variable increases the variability that is predicted by the regression equation for

    asked on October 17, 2018
  38. geography

    The lengths of two sides of a right triangle are 12 inches and 15 inches. What is the difference between the two possible lengths of the third side of the triangle? Round your answer to the nearest tenth.

    asked on January 27, 2016
  39. Test-Taking Strategies

    Please check my answers! Please Check if they are wrong please tell me! Thanks! Only 2 questions! 1: Which of the following is a good way to approach answering an essay question and a test? a.) Start writing your answer as soon as you have read the

    asked on January 16, 2014
  40. consumer math

    Your fixed expenses are $1,035.65/month and are 36% of your realized income. Use proportions to compute the realized income on your budget. I am lost please help

    asked on March 19, 2012
  41. Grammar

    Can someone help with periods and commas? Select the correctly punctuated sentence. A) If you have any further comments or questions, please do not hesitate to contact me. B) If you have any further comments or questions please do not hesitate to contact

    asked on October 21, 2011
  42. Precalculus

    A doughnut shop at a shopping mall sells a dozen doughnuts for $2.95. Beyond the fixed costs of $150 per day, it costs $1.45 for enough materials and labor to produce each dozen doughnuts. If the daily profit varies between $50 and $200, between what

    asked on August 9, 2011
  43. Chemistry

    How many milliliters of a 0.75 M HCL solution do you need to obtain 0.0040 mol of HCL?

    asked on November 17, 2010
  44. stats

    A random sample of 40 men drank an average of 20 cups of coffee per week during examination final, with the population standard deviation equal to 6 cups. A lower limit of an approximate 95% confidence interval the population average cup of coffee is (1)

    asked on March 31, 2010
  45. Science:chemistry

    Chlorine + sodium iodide does it react if it does what is the product of the reaction

    asked on November 5, 2018
  46. Math

    Terre haute to Indianapolis to Bloomington measures 3 cm on the map..what is the actual distance?

    asked on October 24, 2018
  47. Math

    There are four children in a family. The sum of the squares of the ages of the three youngest children equals the square of the oldest child. How old are the children?

    asked on October 8, 2018
  48. Bio

    How much solute is required to make 600mL of a 0.4 M solution of Tris buffer? FW of Tris Buffer= 121.1g Work: Molarity equation= moles of solute/ liters of solution Step 1: 121.1 g / 121.14 g/mol TB = 0.9996 mol TB Step 2: Molarity Eq'n= moles of solute/

    asked on January 30, 2018
  49. math

    Eight sided dice can be described as two square based pyramids stuck together at the bases. Their faces are equilateral triangles. If the edge of one die is 2mm, find the difference in materials cost between a solid gold die and a “gold” painted

    asked on April 20, 2017
  50. read 1

    How is grandmother's dream different from reality? Last night I dreamed of an old lover I had not seen him in forty years. When I awoke, I saw him on the street. His hair was white, his back was stooped. How could I say hello? He would have puzzled all day

    asked on April 13, 2017
  51. algebra

    Find the perimeter of the triangle whose vertices are the following specified points in the plane? (0,-3), (-2,1) and (-4,6)

    asked on October 26, 2016
  52. Science

    1.) Use Newton’s first law of motion to explain how wearing a seat belt in a moving car could help prevent injury. 2.) A skydiver prepares to jump out of a plane. Explain how gravity and air resistance will affect the motion of the skydiver before and

    asked on April 7, 2014
  53. Math

    A college student is using the following model to determine the total number of text messages she will have in the inbox in her cell phone, if she does not delete any of the current messages or future messages she receives in the next x days. In the model,

    asked on February 19, 2014
  54. MATH

    How do the principles of convection, conduction, and radiation explain how the water in the saucepan gets hot?

    asked on January 29, 2014
  55. Chemistry

    25cm^3 of a gas containing only nitrogen and oxygen decomposed to form 25cm^3 of nitrogen and 50cm^3 of oxygen. All the volumes were measured at the same temperature and pressure. Write an equation for the reaction.

    asked on October 13, 2013
  56. Chemistry

    Potassium-42 has a half life of 12.4 hours. How much of an 848 g sample of potassium-42 will be left after 62.0 hours? Please help me!!

    asked on December 11, 2012
  57. Pre Algebra

    If you have 256 ft of fence for your yard. The lenth is 12 feet longer than twice the width. What are the dimensions?

    asked on November 30, 2012
  58. math

    please help! You are paid $7.45/hr at your part-time job. Your deductions are FICA (7.65%), federal tax withholding (10.65%), and state tax withholding (5.7%). Your travel expenses are $5.70 per day worked. You work 12 hours over a 3-day period of time.

    asked on April 9, 2012
  59. physics

    Find the mass in grams of a carbon dioxide molecule.

    asked on March 25, 2012
  60. consumer math

    I really need help please Your primary job’s gross income is $3,500.00/month, and your second job’s realized income is $368.49/month. Deductions are FICA (7.65%), federal tax withholding (10.75%), and state tax withholding (8.35%). How much is the

    asked on March 19, 2012
  61. Medical Terminology

    PROCEDURE: The patient was prepped and draped in the usual sterile fashion. Examination of the vocal cords in a sitting position revealed a polypoid growth in front of the left false vocal cord with erythematous base and yellow- colored tip. Vocal cord

    asked on January 27, 2012
  62. geometry

    The endpoints of are A(9, 4) and B(5, –4). The endpoints of its image after a dilation are A'(6, 3) and B'(3, –3). can you please Explain how to find the scale factor.

    asked on December 19, 2011
  63. geometry

    what is the resultant of the two vectors as an ordered pair? and 5,-5> Thanks

    asked on December 15, 2011
  64. geometry

    I totally don't understand Vectors How do you describe a vector as an ordered pair? on the x and Y where they cross it is 41 degrees and goes to the left up to the y 77 I am totally confused Help

    asked on December 15, 2011
  65. Grammar

    Agreement questions. 1. A number of small bruises __________ present upon examination. A) was B) were 2. A) The patient was brought to the operating room, and we induced general endotracheal anesthesia, and then prepped and draped in the usual sterile

    asked on November 8, 2011
  66. algebra

    Find the value of - 18 + | -12|

    asked on October 12, 2011
  67. trig

    Prove that sin squared 20 degrees+sin squared 40 degrees+ sin squared 80 degrees is equal to 3/2

    asked on March 22, 2011
  68. math

    A wooden pyramid, 12 inches tall, has a square base. A carpenter increases the dimensions of the wooden pyramid by a factor of 5 and makes a larger pyramid with the new dimensions. Describe in complete sentences the ratio of the volumes of the two

    asked on March 6, 2012
  69. physcial science

    How to solve for Jane (mass 40 kg),standing on slippery ice, catches her leaping dog (mass 15 kg) moving horizontally at 3 m/s. What is the speed of Jane and her dog after the catch?

    asked on February 12, 2011
  70. algebra

    bobs garden is a 20 ft times 10 ft rectangle . bob plants tomatoes in half of his garden :radishes in 1/4 of the remander ,then cucmbers in 1/2 of what is left the last area is planted in peppers . what part of the garden is planted in peppers?

    asked on January 28, 2011
  71. chemistry

    How many grams of calcium nitrate, Ca(NO3)2, contains 24 grams of oxygen?

    asked on January 3, 2011
  72. math

    franklin school has 3 boys for every 4 4 girls in fifth grade . there were 140 students in the fifth grade. many are boys many are gorls

    asked on December 7, 2010
  73. psychology

    An experimenter wants to find out if drinking coffee makes people more alert. The amount of coffee a person drinks is the: hypothesis. dependent variable. independent variable. correlation coefficient.

    asked on October 30, 2010
  74. chemistry

    Explain why a suspension is considered a heterogeneous mixture.

    asked on May 23, 2010
  75. spanish

    How do I answer these negatively like they already happened Va a viajar a Perú tu primo Andrés? Va a pagar las sandalias María en la caja? Van a regatear con el vendedor Mónica y Carlos? Va a pasear por la playa tu abuela?

    asked on February 18, 2010
  76. chemistry

    Determine how much heat is evolved or absorbed when 20.0 of lithium iodide completely dissolves in water.

    asked on February 1, 2010
  77. Word Scramble HELP

    Please help to unscramble this word (Nereteo). It is related to a Woodstock themed Word Scramble for a retirment party. None of us on the organizing committee can figure this one out!! HELP!

    asked on June 26, 2009
  78. 1st grade

    is this a sentence the dog rolled in a mud puddle the dog is rolling in a mud puddle

    asked on April 21, 2009

    Romantic sensibility considered nature lonely, eerie, thrilling and even terrifying. true or false I believe it is true

    asked on February 5, 2009
  80. general ability

    Richard's age is equal to 3 times what it will be in 3 years time, minus 3 times what it was 4 years ago. How old is he? a) 20 b) 21 c) 22 d) 23

    asked on February 19, 2008
  81. Chemistry

    The Boltzman formula is S=k In W. A perfect crystal has a molar entropy of 0 at absolute zero because. W=O W=1 W=Na k=1 K=r/Na Why don't you try substituting W = 0 and W = 1, take the ln and see what you get.

    asked on April 27, 2007
  82. Math!!

    Sally deposited $3600 and the annual rate of interest is 6.5%. What is the interest amount for a 30-month period? I = prt. I = amt of interest p = principal r = rate (0.065 per year) t = time in years = 2.5 years I = 3600*0.065*2.5 = ??

    asked on March 31, 2007
  83. Third Grade Math

    Gina traveled 450 miles to her grandmother's house in two days. She traveled 50 more miles on Saturday than on Sunday. How many miles did she travel on Saturday? on Sunday? What does 200 + 250 add to? 450 Lauren collected 150 nickels and dimes. She has 70

    asked on September 24, 2006
  84. math

    Plot points on the number line to represent all whole number values that round to 200 when rounded to the nearest hundred and to 150 when rounded to the nearest ten.

    asked on April 10, 2020
  85. physics

    Consider what happens if I drive toward the clock tower on a day when the speed of sound is 345 m/s . Assume I approach the stationary clock tower at a speed of 15.0 m/s when it rings the 7.50 × 10^2 Hz bell. Calculate what frequency I will hear. 5) Now

    asked on February 17, 2020
  86. physics

    In lab you learned to calculate the depth of water based on the time it takes for a sound wave to travel to the ocean floor and back, assuming that sound travels at a speed of 1500 m/s in the ocean. If I conducted the same test above the Mariana Trench,

    asked on February 17, 2020
  87. physics

    On a summer day, when the temperature outside is 30.0 °C, I hear a 7.50×10^2 Hz bell from the clock tower at URI, which I know is 2300. m away from my house. a) Calculate the speed of sound in air on this day. b) Calculate the wavelength of the sound. c)

    asked on February 17, 2020
  88. Geometry

    Which drawing shows the construction of a perpendicular bisector that is congruent to the solid line segment

    asked on January 28, 2019
  89. Math

    Thx. So 2(2 - 2k) = 3k...?

    asked on December 18, 2018
  90. Social studies

    What is the purpose of primaries and caucuses? Electing the president electing the members of Congress determining party delegate votes or determining Electoral College votes

    asked on October 24, 2018
  91. Social studies

    Does Asha's nation have a limited or an unlimited government

    asked on October 24, 2018
  92. Science

    Flying an airplane at 500 km/h, a pilot plans to reach her destination in 5 h. But she finds a jet stream moving 250 km/h in the direction she is traveling . If she gets a boost from the jet stream for 2 h how long will the flight last?

    asked on May 8, 2018
  93. History

    1.Which of the following decisions best shows the US governments willingness to participate in the global economy? A.relocating domestic jobs to foreign countries B.joining the World Trade Organization C.decreasing spending in international markets

    asked on March 21, 2018
  94. Grade 4 Math - fractions

    On pet day, 18 children brought a pet to school. Two-thirds of the pets were dogs. One ninth of the pets were cats. How many were dogs? How many were cats? How many animals were neither dogs nor cats?

    asked on March 26, 2017
  95. biology

    you added 3ml stock solution of 0.05mg/ml of dye and 7ml of water, what will be the final concerntration.

    asked on February 21, 2017
  96. science

    you added 2ml of protein, 3ml of water, and 4ml of dye. how will you prepare blank for the experiment

    asked on February 21, 2017
  97. Chemistry

    Ammonium nitrate is an oxidizing agent and can give rise to explosive mixtures of mixture of two moles of powdered aluminum and 3 moles of ammonium nitrate crystals react exothermically yielding nitrogen gas water vapor and aluminum oxide how many grams of

    asked on December 11, 2016
  98. Physics

    If the pole-vaulter were to land on concrete rather than on a cushion, the impulse that stops the fall would be what? A) Greater because of the rigidity of the concrete. B) Greater because of the force of impact is greater. C) The same because impulse is

    asked on October 18, 2016
  99. astronomy

    The isotope potassium-40 (40K) decays into the isotope argon-40 (40Ar) with a half-life of 1.25 billion years. Suppose we find a rock in which seven-eighths of the potassium-40 has decayed to become argon-40, and only one-eighth of the original

    asked on October 5, 2016
  100. math

    At the malt shop a large chocolate shake takes 8/9 of a pint of milk. If the medium shake takes 1/7 the amount of a large, how much does the medium shake take?

    asked on June 9, 2016


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