A certain virus infects one in every 400 people. A test used to detect the virus in a person is positive 90% of the time if the person has the virus and 10% of the time if the person does

32,132 results
  1. Conditional Probability

    A certain virus infects one in every 400 people. A test used to detect the virus in a person is positive 90% of the time if the person has the virus and 10% of the time if the person does not have the virus. Let A be the event "the person is infected" and

  2. Biology

    1.) Prophage occurs when a.) It bonds with carbohydrates to create a virus b.) Bacteriophage DNA embeds itself in host DNA c.) It detaches from carbohydrates to create a virus. d.) Bacteriophage DNA detatches itself from host DNA. D.

  3. Biology

    Which of the following statements about virus structure is true? a. All viruses are encased in a viral membrane. b. The capsomere is made up of small protein subunits called capsids. c. DNA is the genetic material in all viruses. d. Glycoproteins help the

  4. Physics help please!!!

    In February 2004, scientists at Purdue University used a highly sensitive technique to measure the mass of a vaccinia virus (the kind used in smallpox vaccine). The procedure involved measuring the frequency of oscillation of a tiny sliver of silicon (just

  5. CIVICS

    2106010 M/J CIVICS - T1 - Unit Test: Origins of American Government I need the answers for this test and I know I forgot to study just please I have 3 F's and I suck and I just wanna play my games I have nothing to do when it comes to this virus so please

  6. Data Probability

    A certain virus infects one in every 300 people. A test used to detect the virus in a person is positive 80% of the time if the person has the virus and 5% of the time if the person does not have the virus. (This 5% result is called a false positive.) Let

  7. Really Need Help Please

    A certain virus infects one in every 200 people. A test used to detect the virus in a person is positive 90% of the time if the person has the virus and 10% of the time if the person does not have the virus. (This 10% result is called a false positive.)

  8. Scientific notation

    a microscope is set so it makes an object appear 4 x 10`2 times larger than its actual size. A virus as a diameter of 2 x10`-7 meter. ow Large will the diameter of te virus appear when it is viewed under te microscope?

  9. CAN A TUTOR HELP ME WITH THIS PROBLEM PLEASE!

    A certain virus infects one in every 600 people. A test used to detect the virus in a person is positive 90% of the time if the person has the virus and 10% of the time if the person does not have the virus. Let A be the event "the person is infected" and

  10. science virus

    i have a question do you think the influenza virus is a active or hidden virus and explain, im really not sure. i said active cause once you get it you feel the sympton right away. can you help me with this?

  11. English

    What do you think of my poem? On Nov 23, 2020, at 10:29 PM, lisarubino2002@yahoo.com wrote: The girl in the room across from me tested positive this week. I hope I don’t end up quarantined because I think I will freak. I need to wash my hands to keep the

  12. Math Exponenet Word problem

    A microscope is set so it makes an object appear 4x10^2 times larger than its actual size. A virus has a diameter of 2x10^-7 meter. How large will the diameter of the virus appear when it is viewed under the microscope?

  13. math

    How do you get the answer to this problem? The Diameter of a typical pinhead is 1 milimeter. If a common virus measures 250 nanometers in diameter, and the virus fits together so well that there are no gaps or overlaps, how many viruses would fit on the

  14. Science

    10. Which of these does a virus need to multiply? A. chloroplasts from a host cell B. a host cell to provide oxygen C. new ADP from a host cell D. a host cell to replicate the virus's DNA***

  15. statistics

    Health care workers are at risk of being exposed to blood-borne pathogens through needle-stick and other sharp object injuries. The pathogens of primary concern are the human immunodeficiency virus, hepatitis B virus, and hepatitis C virus. When a

  16. calculus

    The total number of people infected with a virus often grows like a logistic curve. Suppose that 15 people originally have the virus, and that in the early stages of the virus (with time,t , measured in weeks), the number of people infected is increasing

  17. Biostatstics

    Question: The New York State Health Department reports a 10% rate of the HIV virus for the “at-risk” population. Under certain conditions, a preliminary screening test for the HIV virus is correct 95% of the time. (Subjects are not told that they are

  18. Writing

    Does this sound good? Is there anything I should change? The pandemic that took a world by storm There have been tons of virus outbreaks, each one worse than the last. There are more questions than answers, and in a failing economy, the big question is how

  19. COMPUTER VIRUS..

    Can you help me find out any information about this address? My security program identified it as a virus and promptly removed it. Can you help me identify it? ADW_WEBSEARCH.AS http://answers.yahoo.com/question/index?qid=20060801013521AAUqfpo STay away

  20. Dangling Modifiers

    Could some one check and see ifi got these right If your baby does not like cold apple juice, it should be heated. 1. If your baby does not like cold apple juice, you should heat it. When they are fresh, eating oranges can often keep away the cold virus.

  21. Math

    the population of a city of 750,000 people is devastated by an unknown virus that kills 20% of the population per day. how many people are left after a week? write the exponential equation to the situation.

  22. Anatomy

    A woman who recently came home from a tropical vacation now has abdominal pain and diarrhea. Her blood test results how an elevated eosinophil level. Which of the following organisms is most likely to cause her illness? A. Bacteria B. Worm C. Virus D.

  23. ALGEBRA 117

    2. Biologists want to set up a station to test alligators in the lake for West Nile Virus. Suppose that the costs for such a station are $1,400 for setup costs and $4.00 to administer each test. a. Write an expression that gives the total cost to test x

  24. Math 125

    I am enrolled in an online Math 125 class. I posted this question earlier in the week and never got a response, so here I am! I am just not understanding these questions. I made the tree diagram as suggested and put all the information at the bottom how I

  25. Computer Viruses

    A virus that infects an application program is known as a _________. a) boot sector virus b) macro virus c) Trojan horse d) file virus From what I understand, both macro viruses and file viruses affect application programs such as Word and Excel. So which

  26. calculus

    The total number of people infected with a virus often grows like a logistic curve. Suppose that 15 people originally have the virus, and that in the early stages of the virus (with time,t , measured in weeks), the number of people infected is increasing

  27. Physics

    A spherical virus has a diameter of 50mm . It is contained inside a long, narrow cell of length . What uncertainty does this imply for the velocity of the virus along the length of the cell? Assume the virus has a density equal to that of water.

  28. chemistry

    A viral preparation was inactivated in a chemical bath. The activation process was found to be first order in virus concentration. The beginning of the experiment 2% of the virus was found to be inactivated per minute. [i] Evaluate k for the inactivation

  29. science

    Which is the effect of producing antibodies that attach to last season's flu virus? A. get this season's flu virus B. receive this season's flu vaccine C. immune to last season's flu virus D. get infected by last season's flu virus

  30. chemstry

    the hiv virus that causes aids destroys the immune system in the body. classify the hiv virus and explain the statement

  31. biology

    Stuck on this question. When infected by the Hepatitis B virus (HBV), many patients experience flu-like symptoms such as fever, loss of appetite, nausea, vomiting, and malaise. This is called acute hepatitis. During this stage, what is the HBV doing? What

  32. BioMedicine

    54) The suspension of virus has a concentration of 250 ng/uL. What would be the concentration in the third test tube? A. 25 ng/ul B. 2.5 ng/uL C. 0.25 ng/uL D. 0.025 ng/uL why is the answer C? thank you

  33. statistics

    Q: For each question, discuss the cost of making each type of error. 1. A customer purchases an item. Once they exit the store, the alarm goes off. This alarm goes off routinely for paying customers. 2. A patient is diagnosed as negative when a doctor

  34. Science

    1. __________ is one type of genetic engineering, in which a normal allele is placed into a virus. (1 point) A color blind test Down syndrome Gene therapy Polygenic inheritance 2. Human insulin can be produced by _______, which introduces DNA from one

  35. Finite Math

    A certain virus infects one in every 500 people. A test used to detect the virus in a person is positive 90% of the time if the person has the virus and 10% of the time if the person does not have the virus. Find the probability that a person does not have

  36. Math

    Use Bayes' theorem to solve this problem. A certain virus infects 10 in every 5000 people. A test used to detect the virus in a person is positive 96% of the time if the person has the virus and 2% of the time if the person does not have the virus (false

  37. Math

    A certain virus infects one in every 300 people. A test used to detect the virus in a person is positive 80% of the time if the person has the virus and 5% of the time if the person does not have the virus.

  38. Conditional Probability

    A certain virus infects one in every 600 people. A test used to detect the virus in a person is positive 90% of the time if the person has the virus and 10% of the time if the person does not have the virus. Let A be the event "the person is infected" and

  39. Check Answer!! Conditional Probability

    A certain virus infects one in every 500 people. A test used to detect the virus in a person is positive 90% of the time if the person has the virus and 10% of the time if the person does not have the virus. Let A be the event "the person is infected" and

  40. Can someone help me please I've tired this problem

    A certain virus infects one in every 300 people. A test used to detect the virus in a person is positive 80% of the time if the person has the virus and 5% of the time if the person does not have the virus. (This 5% result is called a false positive.) Let

  41. Bayes' Theorem

    I tried the problem and my answers are still coming up wrong?. You can compare to mine to see where you (or I) went wrong. I'm a little rusty on Virus infects one in every 200 people. A test used to detect the virus in a person is positive 90% of the time

  42. AP Statistics

    Viruses are infectious agents that often cause diseases in plants. Different viruses have different potency levels, and this fact can be used to detect whether a new virus is infecting plants in the field. In a potency comparison experiment, two viruses

  43. AP Stats

    Viruses are infectious agents that often cause diseases in plants. Different viruses have different potency levels, and this fact can be used to detect whether a new virus is infecting plants in the field. In a potency comparison experiment, two viruses

  44. Virus :P

    A virus spreads in a small town. What should first do to find a vaccine for the virus? I narrow it down to "Idenify the Virs" and "Idenify the host of the virus" I say identify the host of the virus first.

  45. science

    How do scientists know how to make a flu vaccine if viruses can be different every year? he flu virus changes every year. However, scientists gather information about virus mutations, or changes, before the flu-virus season begins. This lets them predict

  46. Biology/English

    I read The Andromeda Strain and I have to make an outline of the scientific method using Examples from the book. This is what I have so far: ASK- "What killed all the people in Piedmont"? RESEARCH- When they released the germ into the cage with the mouse

  47. Statistics - Probability

    Viruses reach networks by requests for communication that are identified as packets. A security system can detect them if at least one such packet is observed by a network sensor. Assume that the probability of observing a single packet sent from a new

  48. Computer Information

    1) The major disadvantage to backing up your data on CDs or DVDs is that they are _____ a) not writable b) slow c) volatile 2) A virus that infects an application program is known as a _____. a)a boot sector virus b) Trojan horse c) file virus. On #!, I

  49. science

    if a DNA virus infects a cell, why must it produce RNA?

  50. Genetics

    By the way, my homework is due Wednesday, November 13th at 4:10 pm. I would appreciate it if you could please walk me through all of the steps to solve all parts of this problem. In the garden pea, orange pods (g) are recessive to green pods (G), and

  51. biology

    In the search to discover the agents that caused mad cow disease, scrapie in sheep, and CJD and kuru in humans, the diseased brain tissues were filtered and still found to be infective, indicating they are not bacteria but either viruses or chemical

  52. Physicsss

    A typical virus is a packet of protein and DNA (or RNA) and can be spherical in shape. The influenza A virus is a spherical virus that has a diameter of 85 nm. If the volume of saliva coughed onto you by your friend with the flu is 0.023 cm3 and 10−9 of

  53. Science

    what are some barriers to solve the zika virus problem? What are some possible solutions for zika virus problem? According to the off the podium article about zika virus. tnx a lot .

  54. maths

    during an outbreak of the ebola virus. Health workers gathered the following information .1) by the end of the first week 982 people were infected. Thereafter the number of people infected increased by 9% per day. Approximately how many people were

  55. Pre-calculus

    So a computer virus has been created via Corporate e-mail. Let t=0 be the time of the first 100 infections, and at t=17 minutes the population of infected computers grows to 200. Assume the anti-virus companies arent able to identify the virus or slow its

  56. Math

    Exponential Growth It turns out that zombies are created by a virus. In 2025 there are 450 people infected by the virus and the number triples every week. The population of Canada is 3,500,000. How many sees will it take for all of Canada to be infected?

  57. AP Biology

    compare and contrast the mode of reproduction of a DNA virus with that of a typical RNA virus (retrovirus).

  58. science

    compare and contrast a latent virus and an active virus. Give an example of each.

  59. Physics, URGENT!!!

    We consider tobacco virus diffusing along a 0.47 m long tube filled with water. The cross-sectional area of the tube is unknown. The diffusion coefficient is found in Table 10.5, p. 319 in the textbook. A total amount of virus of 2.6 x 10-16 kg is

  60. Bio

    Why do doctors recommend that people get a flu shot each new flu season? The vaccine wears out over time. The body eliminates the vaccine. The flu virus changes every year. The flu virus becomes immune to the vaccine.

  61. chemistry urgent urgent

    ... the hiv virus that causes aids destroys the immune system in the body. classify the hiv virus and explain the statement.

  62. Biology

    Can you explain what the quality of the reverse transcriptase in the HIV virus has to do with the problem that there is still no vaccine against the HIV virus?

  63. Stats

    the director of an insurance companies computing center estimates that the companies computer has a 20% chance of catching a computer virus. However they feel that there is only a 6% chance of the computers catching a virus that will completely disable the

  64. English

    There are more than 200 different cold viruses. You can build up protection against a cold virus that you have already had. How ever, this 'immunity' can not help a person fight off a different cold virus. Immunity means: A. the spread of a disease B. the

  65. chemistry

    Please help me with this dilution. Given a very concentrated tube of virus. Apply serial dilution to make 1:7500 dilution. Dilute virus in PBS

  66. Biology

    During the ______ pathway, a host cell infected with a virus lyses and releases new virus particles. During the _______ pathway, viral DNA replicates along with the cell, but new viruses are not immediately produced. Please help!

  67. Virus

    Can a virus attach to your cells and steal nutrients from it? Answer: Yes. Can a virus attach to your cell and burst it by filling it up with water? Answer: No Correct?

  68. Math/Physics

    1. A typical virus is a packet of protein and DNA or RNA and can be spherical in shape. The influenza A virus is a spherical virus that has a diameter of 85nm. If the volume of saliva coughed on to you by a friend with the flu is .010cm^3 and 10^-9 of that

  69. Math

    The average number of new virus particles (virions) produced by a virally-infected cell during its lifetime is called the burst size. We will call the burst size N. Under reasonable assumptions, N can be approximated by N = p/u(p) where p is the rate of

  70. computers

    What is a computer virus ? I know that it is something that is not good for your computer and they have anti-virus software but not sure of a good way to define what it means any help would be great thanks ?

  71. Biology

    41. A group calling itself "Virus Alive!" believes that viruses are living organisms. They have petitioned the scientific community to include viruses in the biological classification system. You are a scientist assigned to explain to this group that,

  72. Algebra

    Biologists want to set up a station to test alligators in the lake for West Nile Virus. Suppose that the costs for such a station are $2,500 for setup costs and $3.00 to administer each test. Write an expression that gives the total cost to test x animals

  73. Algebra 2

    2. Biologists want to set up a station to test alligators in the lake for West Nile Virus. Suppose that the costs for such a station are $2,500 for setup costs and $3.00 to administer each test. a. Write an expression that gives the total cost to test x

  74. Biology

    41. A group calling itself "Virus Alive!" believes that viruses are living organisms. They have petitioned the scientific community to include viruses in the biological classification system. You are a scientist assigned to explain to this group that,

  75. Biology

    (Is my answer right or wrong because i have no idea.) Why is the caspid protein important? The caspid includes protein that enable a virus to enter a host cell. The caspid protein of a typical virus bind to the surface of a cell and "tricks" the cell into

  76. Public Health

    Warnings for an outbreak of an Asian avian virus have been circulating since 1997, although only isolated incidences have occurred since then. Still, reputable scientists are still concerned that this virus could mutate at any time and cause a world-wide

  77. HEALTH

    Dr bob's computerized records have been compromised by a virus, resulting in damages to patients. Which of the following is most true? a) Dr bob will not be liable. b) dr bob will be liable. c) dr bob won't be liable if the virus was introduced by someone

  78. biology

    Human immunodeficiency virus (HIV), the virus that causes AIDS, is unique because its main genetic instructions are in the form of RNA instead of DNA. Because of this, it’s called a(n) (A) __________. When a person is infected with HIV, the immune system

  79. algebra

    2. Biologists want to set up a station to test alligators in the lake for West Nile Virus. Suppose that the costs for such a station are $3000 for setup costs and $2.00 to administer each test. e. How many animals should be tested for the average cost to

  80. Ms, Sue, I have a question for you.

    I need people to take an online survey for me. Don't worry, it's completely virus free. It's about factory farming, but it won't let me share a link here. I need more people to take it. So, can you allow me to post the link? Please?

  81. english

    Are these sentence types correct? Complex While scientists are studying past diseases such as the Spanish flu, they constantly worry about the next pandemic to strike. Compound Various research facilities, such as the World Health Organization, are

  82. Health question

    Is Lyme disease caused by a virus,parasite,or a fungus? Isn't it caused by a parasite? http://www.cdc.gov/ncidod/dvbid/lyme/ I know lyme disease is caused by a bacteria,but would that be a virus,or a parasite? Wouldn't it be a parasite?

  83. English

    Correct this: The virus may cause AIDS, cancer, or even kill. Do I need to add a word in front of cancer? Would this be correct? The virus may cause AIDS, produce cancer, or even kill.

  84. Microbiolgy- Please Help!

    You wish to study a variant [a close relative] of the Tobacco Mosaic virus. Specifically you want to characterize the capsid and genetic component as well as determine the viral load required to cause a disease state. a. What methodologies might you use to

  85. Health questions

    We both asked these questions yesterday but we are both confused. 1.Giardiaqsis is a communicable illness transmitted: A. through direct and indirect contact with infected fecal material. (or) B. by touching the moist lining of the eyes and nose. 2. Lyme

  86. AP Biology

    In 1918 a particularly virulent strain of influenza (an RNA virus) wiped out millions of health humans in the prime of their lives. Epidemiologists fear that such a super bug could revisit us in the future. And thus there was quest to find samples of the

  87. religion

    What is the first horse that God send to let people know that he will return soon Could the corona virus be that horse?

  88. Anatomy and Physiology

    A woman who recently came home from a tropical vacation now has abdominal pain and diarrhea. Her blood test results show an elevated eosinophil level. Which organism is most likely the cause of her illness? A. Bacteria B. Virus C. Fungus D. Parasite I got

  89. microbiology

    A patient was seropositive for HIV experieced abdominal pain, fatigue, and low-grade fever for 2 weeks. A chest x-ray showed lung infultrates. Gram and acid fast stains were negative. Viral culture showed a large enveloped polyhedral virus with double

  90. Algebra

    Suppose that a virus doubles every 3 hours. If a person has 30 virus cells, how many will he have after 9 hours? I got 810,000. 30*30=900 900*900=810,000 or would it be 240 since 30*2=60 60*2=120 120*2=240

  91. math

    in a school with 1500 students , one student returned from vacation with a contagious flu virus on 1st January. the spread of the virus through student body is given by y=1500/1+1499e^-0.85t where y is the total number of students infected after t days.

  92. Algebra

    Biologists want to set up a station to test alligators in the lake for West Nile Virus. Suppose that the costs for such a station are $2,500 for setup costs and $3.00 to administer each test. Would the average cost ever fall below $3.00? If so, identify a

  93. Biology

    19. Which is NOT a general characteristic of plants? a. use oxygen to make usable energy b. primary producers c. have specialized cells d. cell walls composed of cellulose I think it might be either A or B... 24. During initial HIV infection, the HIV virus

  94. Managerial Economics

    Suppose your company is considering three health insurance policies. The first policy requires no tests and covers all preexisting illnesses. The second policy requires that all covered employees test negative for the HIV virus. The third policy does not

  95. Maths

    Suppose that the reliability of a HIV test is specified as follows: Of people having HIV, 90% of the test detect the disease but 10% go undetected. Of people free of HIV, 99% of the test are judged HIV–ive but 1% are diagnosed as showing HIV+ive. From a

  96. Maths

    Suppose that the reliability of a HIV test is specified as follows: Of people having HIV, 90% of the test detect the disease but 10% go undetected. Of people free of HIV, 99% of the test are judged HIV–ive but 1% are diagnosed as showing HIV+ive. From a

  97. Science 8th grade

    Please check my answer thanks A woman who recently came home from a tropical vaction now has abdominal pain and diarrhea// Her blod test show an elevated eosinophil level. Which of the following organisms is most likely the cause of her illness? A Bacteria

  98. Health

    what is a virus?

  99. Biology

    19. Which is NOT a general characteristic of plants? a. use oxygen to make usable energy b. primary producers c. have specialized cells d. cell walls composed of cellulose I think it might be either A or B... 20. Which of the following are characteristics

  100. Biology

    19. Which is NOT a general characteristic of plants? a. use oxygen to make usable energy b. primary producers c. have specialized cells d. cell walls composed of cellulose I think it might be either A or B... 20. Which of the following are characteristics

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