Posts by sharon

Total # Posts: 868

  1. statistics

    According to Chebyshev's theorem, what proportion of a distribution will be within k = 4 standard deviations of the mean? Show all work as to how to find this.
  2. statistics

    I am unsure. This is how the question was worded.
  3. statistics

    In the formula ? (x – µ)^2/n for the variance, in what cases would we divide by n-1 instead of n?
  4. Math

    What are the general formula for the sequence 1,4,9,16
  5. Physics

    Types of thermometer
  6. statistics

    You have been asked to do a survey of student satisfaction with MyMathLab courses at South University. Describe how you would obtain a sample of these types: stratified and simple random
  7. statistics

    A cereal manufacturer seeks to test their newest product against a competitor’s. A group of 100 children was asked to evaluate each brand, and then to express a preference. To guard against bias, neither the children, nor the technicians serving them, were aware of the ...
  8. statistics

    When a parachute is inspected, the inspector is looking for anything that might indicate the parachute might not open. - State the null and alternative hypotheses for this situation.
  9. statistics

    If the critical values of a hypothesis test are +2.58 and -2.58, what would be the critical regions?
  10. Microbiology

    . If you counted 20 colonies from a 0.01-ml inoculum of a 1:10 dilution of urine, how many organisms per milliliter of specimen would you report? Is this number significant?
  11. statistics

    if you counted 20 colonies from 0.01-ml inoculum of a 1:10 diulation of urine, how many organisms per milliliter of speciman would you report? Is this number significant
  12. statistics

    The Maximum Error of Estimate is exactly equal to half of the width of the confidence interval. T-F, and why or why not?
  13. statistics

    ? Find the probability that a data value picked at random from a normal population will have a standard score (z) that lies between the following pairs of z-values. ? z = 0 to z = 2.10 ? X
  14. statistics

    Please help. I have no idea what I am doing Use the standard normal (z score) table to find: P(-1.00 ? z) & Find the probability that a data value picked at random from a normal population will have a standard score (z) that lies between the following pairs of z-values. z = 0 ...
  15. statistics

    A box contains 10 items, of which 3 are defective and 7 are non-defective. Two items are randomly selected, one at a time, with replacement, and x is the number of defectives in the sample of two. Explain why x is a binomial random variable. & For the first question about the ...
  16. statistics

    A box contains 10 items, of which 3 are defective and 7 are non-defective. Two items are randomly selected, one at a time, with replacement, and x is the number of defectives in the sample of two. Explain why x is a binomial random variable
  17. statistics

    You have been asked to do a survey of student satisfaction with MyMathLab courses at South University. Describe how you would obtain a sample of these types: stratified and simple random.
  18. statistics

    Please help. I have no idea how to do thisA cereal manufacturer seeks to test their newest product against a competitor’s. A group of 100 children was asked to evaluate each brand, and then to express a preference. To guard against bias, neither the children, nor the ...
  19. statistics

    If we wish to have a 90% confidence interval, what would be the value of ?/2? Show how you arrived at this answer.
  20. statistics

    According to Chebyshev’s theorem, what proportion of a distribution will be with k=4 standard deviations of the mean? Show all work as to how to find this
  21. Law

    Write a paragraph on the sources of law in which you have to address the following aspects: The kinds of sources of law; examples of sources that belong to each kind; the differences between the kinds of sources of law; the source of law which you have to use; to which kind of...
  22. Math

    Differentiate y=3secxtanx
  23. physics

    a force of 0.8N stretches an elastic spring by 2cm. find the force constant. f e = k=? f=ke 0.8=0.02 * k k=0.8/0.02 k=40N/m
  24. floral

    September
  25. Statistics

    Find the area under the standard normal curve between z = 0 and z = 1.37.
  26. Statistics

    Find the area under the standard normal curve between z = 0 and z = 1.37.
  27. Statistics

    Find the area under the standard normal curve between z = 0 and z = 1.37.
  28. Statistics

    According to Chebyshev’s theorem, what proportion of a distribution will be with k=4 standard deviations of the mean? Show all work as to how to find this. I have no idea on how to do this. HELP!!!!
  29. statistics

    You are responsible for planning the parking needed for a new 256-unit apartment complex, and you are told to base the needs on the statistic “average number of vehicles per household is 1.9.” Which average (mean, median, mode) would be best if: • You wanted to ...
  30. statistics

    Describe whether the following study would most likely be “observational” or “experimental”, and why it would be so. * The nurses on the 5th floor record the medicines administered every day and report results to the doctors. don't understand at all
  31. Algebra

    The quotient of A number and 2, decreased by 5, is equal to 35. Find the number
  32. Geometry

    The segment joining p1(-4,-7)and p2(6,9)is divided in to four equal parts find the points of division
  33. Math

    The segment joining p1(-4,-7)and p2(6,9)is divided in to four equal parts find the points of division
  34. algebra

    The segment joining p1(-4,-7)and p2(6,9)is divided in to four equal parts find the points of division
  35. maths

    Gary can get two loan, $12,000 at 8% simple interest for 9 months or a $12000 9- month discounted loan at 7% discount. based on the actual interest paid and the true rate on the discounted loan, which of the two loan offers will Gary choose
  36. American Government

    3 was wrong
  37. Statistics

    Construct a 99% confidence interval for life expectancy of a new GE light bulb. 64 bulbs are randomly selected and a mean of 750 hours and a standard deviation of 20 hours is found. Assume the distribution of life expectancy is normally distributed.
  38. Algebra 2

    the sum of two numbers is 74. one number is 11 more than half the other. find both numbers
  39. physics

    a car with a mass of 1.50 x 10^3 kg starts from rest and acceleration to a speed of 18.0 m/s in 12.0 s. Assume that the force of resistance remains constant at 400.0 N during this time. What is the average power developed by the cars engine
  40. Math

    The Blue Jays won 17 more games than they lost. They played 52 games in all and had 3 ties. How many games did they lose?
  41. Algebra

    What is the slope Gas cost 3.29 per gallon. A function can be used to describe the cost to fill up a car.
  42. Geometry

    they are alternate interior
  43. Geometry

    Write a two column proof for: Given t is parallel s; angle 5 is congruent to angle 6. Prove: l is parallel m. Statements Reasons 1. t is parallel 1. Given to s 2.
  44. Math

    order these numbers from least to greatest. 3/20, 45%, 1/5, 7.5%, 27.5%
  45. MATH

    Allyne said that she had 8/5 of pizza left from the party. Billy said that she had 1.3 pizzas left. Explain if Billys answer is correct or not.
  46. Maths

    You wonder what altitude the plane reached when it was directly above the end of the runway and how far it travelled to get to that point. You know the runway tarmac is 5500 metres long and approximate that when the plane left the ground, it took off at an angle of 40 degrees...
  47. Math

    You are skier A, the first skier in a skiing event with three other skiers. Compared to your time, skier B is slower, by a time of +00:28. Skier C has a time of +2:13, and skier D has a time of -01:24. 1. Who is the fastest skier? 2. Since all times are compared to yours, what...
  48. Math/algebra

    The scale on a map is 2 cm : 7km. If two cities are 12 cm apart on the map what is the actual distance in km between the two cities? " this is NOT a homework question" i don't understand any of this!
  49. Math

    Mask put 130trading cards in protector sheet he fills 7 sheet and put the remaining 4 cards and 8 sheets each of the sheets has the same number of cards how many cards are in each filled sheet
  50. life sciences

    Describe how the products of the light phase of photosynthesis are used to form a glucose molecule and how this molecule is then broken down in the cell of a plant to release energy
  51. Algebra

    General tickets sell for $6 and adult $9. Sell at least 300 student and at least 500 adult. Costs $1 to advertise for adult and $.50 to advertise student. Have at most $400 for advertising. What is most profit that can be made? algebra inequalities
  52. science

    What is the pathaway and processes of ingestion involved when a person has eaten a buttered polony sandwish?
  53. life orientation

    Housing
  54. Life orientation

    Identity 4 hu rights violation and give two examples of such violation
  55. Chemistry

    How many grams of NO2 are needed to form 100.0g of HNO3?
  56. Chemistry

    How many moles of O2 must react with 0.550 mole ofMethanol?
  57. Chemistry

    How many grams of carbon dioxide ctsare produced when 78.0 grams of Methanol rea
  58. Rebus

    Hot BB water
  59. math

    which is the least? 3/7, 2/5, 1/2, 1/3 I have no idea!
  60. Biology

    bond that holds atoms together in a molecule are... A.radiation energy B. kinetic energy C. thermal energy D. potential energy
  61. Biology

    which nucleic acid statement is true? A. mRNA codes for DNA B. mRNA codes for protein C. tRNA makes amino acids D. tRNA makes lipids I think B
  62. biology

    Pepsin is... A. enzyme B. lipid C. carbohydrate D. nucleic acid I think A!
  63. Biology

    key factor driving cellular differentiation in the body? A. rate of transcription B. cell nutrience C. expression of genetic coding D. chemical gradients in a cell environment I think A
  64. chemistry

    chlorine atoms have larger radii than fluorine A. True B. false I am unsure Answer Th
  65. Biology

    DNA can copy itself easier than RNA because? A. its a double helix B. polymer of nucleotide C. its confined to nucleus D.its supported by histone proteins I have no idea
  66. Science

    RNA is thought to have proceeded proteins and DNA, why? A. more types of RNA than DNA B. single stranded RNA is less complex than DNA Not sure if either are correct?
  67. Science

    Thanks!
  68. Science

    Sustained increase in the population that makes up all the trophic levels requires an increase in A. primary producers B. primary herbivores C. primary carnivores D. keystone predators
  69. English

    Thanks!
  70. English

    Wow, she did great today. Wow is what part of speech in the sentence? I think a preposition but not sure?
  71. chemistry

    What is the bond of a salt molecule? A. covalent B. hydrogen C. disulfide D. ionic I think A
  72. Science

    DNA can copy itself easier than RNA because? A. its a double helix B. polymer of nucleotide C. its confined to nucleus D.its supported by histone proteins I have no idea
  73. Science

    chlorine atoms have larger radii than fluorine A. True B. false I am unsure
  74. Science

    Genetic Information is found where? A. nuclei B. ribosome I think A
  75. Science

    key factor driving cellular differentiation in the body? A. rate of transcription B. cell nutrience C. expression of genetic coding D. chemical gradients in a cell environment I think A
  76. Science

    Pepsin is... A. enzyme B. lipid C. carbohydrate D. nucleic acid I think A!
  77. chemistry

    S and O share chemical properties, but H2S is gas at room temp. and H2O is a liquid, why? A. H2O has stronger intermolecular bond B. H2S has a stronger intermolecular bond C. H2S has a stronger ionic bond D. H2O has a stronger ionic bond
  78. Science

    What cell stimulates immune cells to attack? A. Helper T cells B. Cytotoxic T cells
  79. Science

    Bond that holds atoms together in a molecule are? A. radiation energy B. kinetic energy C. thermal energy D. potential energy I think B
  80. Science

    What is the bond of a salt molecule? A. covalent B. hydrogen C. disulfide D. ionic I think A
  81. Science

    Lifelong protection after exposure such as the chicken pox is which type of immunity A. Active immunity B. innate immunity I think B
  82. Science

    function of smooth ER A. synthesis lipids B. form ribosomes C generate energy D phagocytose bacteria I think A
  83. Science

    Which example is an example of natural selection A.prairie dogs build an underground tunnel B. fish omit odor to avoid sea lions C. cats with better nutrition play more D. lizards absorb vitamin D to help digest food. I think B
  84. Biology

    Which nucleic acid statement is true A. mRNA codes for DNA B. mRNA codes for proteins C. tRNA makes amino acids D. tRNA makes lipids I think B
  85. chemistry

    The hands on a battery clock are which type of energy? A. chemical to kinetic B. potential to chemical C. kinetic to potential D. thermal to kinetic I think C
  86. english

    Jimmy you must leave the room shut the door and be quiet. Which of the following options correctly punctuates the sentence above? A Jimmy, you must leave the room, shut the door, and be quiet. B. Jimmy; you must leave the room, shut the door and be quiet. C. Jimmy you must ...
  87. english

    A?
  88. english

    Jimmy you must leave the room shut the door and be quiet. Which of the following options correctly punctuates the sentence above? A Jimmy, you must leave the room, shut the door, and be quiet. B. Jimmy; you must leave the room, shut the door and be quiet. C. Jimmy you must ...
  89. english

    Which of the following sentences is written correctly? A When properly designed, an automobile can achieve great fuel efficiency. B. When properly designed an automobile can achieve great fuel efficiency. C. When properly designed, great fuel efficiency can be achieved by an ...
  90. english

    Which of the following sentences is punctuated correctly? A. After you sign the agreement it is too late of course, to change your mind. B. After you sign the agreement, it is too late of course to change your mind. C. After you sign the agreement, it is too late, of course, ...
  91. Physics

    A pulley system has a velocity ratio of 4 and an efficiency of 80%.calculate the value of the effort required to raise the load of 480N
  92. Science (Physics)

    S=ut + 1\2at*2 S=0×5 + 1\2×30×5×5 Divide through 2 by 30 S=0 + 6×5×5 Multiply together S= 0 + 150 S=150m
  93. Science (Physics)

    S=ut + 1\2at*2 S=0×5 + 1\2 30×5×5 Divide through 2 by 30 S=0 + 6×5×5 Multiply together S= 0 + 150 S=150m
  94. Math

    finding the missing measurement: A rectangular prism has a volume of 195 cubic units. The length of the prism is 13 units and the width of the prism is 3 units, what is the height
  95. mathematical Literacy, Economics and Business Stud

    What career(s) can I pursue with these subjects? Please help. I am very lost.
  96. Chemistry

    Second one same way as first you will get C-1 H-2 Empirical formula is CH2 Empirical formula mass is 14u Molar mass is 42.08u Divide molar mass by empirical formula mass and you'll get n value. N=3 Multiply N to empirical formula to get molecular formula which is C3H6 (...
  97. Chemistry

    First one , 1- percentage of cerium (Z=58) 1.67/6.21 * 100% = 26.89% 2- percentage of iodine is 100- 26.89= 73.10% Divide each of the percentage by its mass then we get Cerium- 26.89/140=0.192 Iodine - 73.10/126.9=0.576 Out of those two numbers divide both by the lowest no. ...
  98. science

    so the answer would be A
  99. science

    Predict how the range of the projectile will change when you change the angle from 45∘, keeping the speed constant. Predict how the range of the projectile will change when you change the angle from , keeping the speed constant. A. It increases with either an increase or...
  100. science

    First, you will investigate purely vertical motion. The kinematics equation for vertical motion (ignoring air resistance) is given by y(t)=y0+v0t−(1/2)gt2, where y0=0 is the initial position (which is 1.2 m above the ground due to the wheels of the cannon), v0 is the ...
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