Andrea

Newest questions posted by Andrea
  1. math

    Slope -6/7; through (3,5) Write the equation using function notation please help!!!!!!!!! :(
  2. math

    6 divided by the difference of a number and 2, minus 5 divided by a number plus 2, equals 5 times the reciprocal of the difference of the number squared and 4. What is the number? Please help ASAP!!!!!!!!! :(
  3. math

    The volume of a cone varies jointly as the square of its radius and its height. If the volume of a cone is 2 pi cubic inches when the radius is 1 inch and the height is 6 inches, find the volume of a cone when the radius is 5 inches and the height is 3
  4. math

    If A={x|x is an odd integer} and B={9,11,12,14} list the elements of A n B. So find the intersection of A and B. Please helpppppp!!!!!!! :(
  5. math

    The function A(r)=πr^2 may be used to find the area of a circle with radius r. Find the area of a circle whose radius is 11 centimeters.
  6. math

    Write in standard form when given 2 points on a line (-3,-5) and (0,-7) Please helpppppppp!!!!!!!!!!! :(
  7. history

    In “The Raven and the First Men: The Beginnings of the Haida,” which evidence best helps the reader infer that the Haida might find it acceptable behavior to play tricks on one another?
  8. Math

    Tony is 56 years younger than stacy 4 years ago stacy age was 3 times tony. How old is tony now
  9. Math

    Andres is 6 years older than kylie. In 8 years the sum of their ages will be 88. How old is andres now
  10. math

    Solve the equation for the indicated variable. Please helpppp!!!!! :( A=(730x)/(d^2) for x
  11. Math

    The length of the rectangle is 7/(x-4) feet, while its width is 5/x feet. Find its perimeter. Please helppppp!!!!!!! :(
  12. social studies

    how would you compare and contrast the Virginia and New Jersey Plans.
  13. math

    list some equivalent forms of -x+3/6x-11 please helpppppppp!!!!!!! :(
  14. History

    What were 3 key causes of the American Revolution:
  15. History

    During the American Revolution what was the role of Thomas Paine’s Common Sense in promoting the movement for independence
  16. History

    What was George Washington's fundamental beliefs about life and what was Thomas Jeffersons.
  17. History

    what motivated Thomas Jefferson?
  18. history

    why might Leonard believe that democracy would inevitably degenerate into tumult, violence, and anarchy
  19. History

    Which type of government did Daniel Leonard prefer?
  20. Science

    A student measures the volume of a liquid and finds it to be 40ml. How many significant figures are in the measurement ? Really confused can someone help me out ?
  21. Math

    Rewrite in rectangular form: r=6 cos theta I got (x-3)^2+y^2=6
  22. Math

    How would you show that one trigonometric expression is equal to another? I’m not exactly sure how to start.
  23. Chem

    What is the pKb of Formate ion? 0.64M ........... 8.77 pH Help!! I'm not sure how to calculate this... I know to use the Kb formula but I'm not sure where to plug the numbers in.
  24. Chemistry

    I am given the following information: Lactic acid................0.025M...................pH 2.74 How do I calculate the pKa? I don't know how to do it without the concentration. Help please!
  25. Math

    On his last four tests, Danib scored 55%, 78%, 84% and 93%. What score should he get on his next text so that his average on all five tests are 80%?
  26. Chemistry

    If you had an acetic acid solution that was 0.10 M, what would the acetate concentration have to be in order to get a pH of 5.35? I tried doing [H+] = 10^(-pH), but I don't think that's right. Please help, I'm stuck.
  27. AP Chem

    Please! This is urgent! I don't know how to do this. Determine the solubility at 25°C of Cd(IO3)2 in water and in 0.20 M CdCl2. Ksp of Cd(IO 3) 2 is 2.5 × 10 –8 at 25°C. Please help!
  28. math

    The formula for the lateral surface area of a cone is A=πr√(h^2+r^2). (A)Solve for r and simplify the result, if possible. (B) If the lateral surface area of a cone is 10 square feet and the height is 16 inches, what is the radius of the cone in inches?
  29. math

    The formula for the surface area of a cylinder is A=2πr^2+2πrh. (A)Solve for r and simplify the result, if possible. (B) If the surface area of a cylinder is 100 square feet and the height is 40 inches, what is the radius of the cylinder in units of
  30. math

    The projected number N of Wi-Fi enabled cell phones (in millions) in the U.S. can be modeled by the function N=-0.4x^2+21x+35, where x is the number of years since 2009. If the trend continues, find the year in which the projected number of Wi-Fi enabled
  31. math

    Suppose that the position y (feet) of a projectile above the ground is described by the equation y=-16t^2+70t+2, where t is the time elapsed (seconds) since the object was launched. (A) What is the initial position of the object? (B) When will the object
  32. math

    (A)Write the equation in standard form and calculate its discriminant. (B)Solve the equation by using the quadratic formula. (C)After solving the equation, write it in factored form. 7x(x-2)+2(x+4)=3 Please help!!!!! :(
  33. math

    Solve the quadratic equation (2x+3)(x-3)=7. If there is more than one correct answer, enter your answers as comma separated list. If there are no real solutions,enter none. Please help!!!!! :(
  34. math

    (A)Write the equation in standard form and calculate its discriminant. (B)Solve the equation by using the quadratic formula. (C)After solving the equation, write it in factored form. 0=8+4t-t^2 Please help!!!!! :(
  35. math

    (A)Write the equation in standard form and calculate its discriminant. (B)Solve the equation by using the quadratic formula. (C)After solving the equation, write it in factored form. 1/8x^2=x-5/2 Please help!!!!! :(
  36. math

    Solve the equation by completing the square. If the solutions are real, give exact and approximate answers. Otherwise, list the exact solutions. 7x^2-4x+1=2x^2-7x+3 Please help!!!!! :(
  37. math

    Solve the equation by completing the square. If the solutions are real, give exact and approximate answers. Otherwise, list the exact solutions. 12x=-3x^2-14 Please help!!!!! :(
  38. math

    Solve the equation by completing the square. If the solutions are real, give exact and approximate answers. Otherwise, list the exact solutions. 2y^2=-12y-3 Please help!!!!!!:(
  39. math

    Evaluate the expression√(-6)/(√(-3) √(-4)) and write the result in the form a+bi. Please help!!!!! :(
  40. math

    Is 2+i a solution of z^2-4z+5=0? Please help!!!!!!! :(
  41. math

    The volume of a cone of radius r and height h is V=1/3πr^2h.Solve for r. Please help me!:(
  42. math

    The volume of a cylinder of radius r and height h is V=πr^2h.Solve for r. Please helppppp!!!!
  43. math

    The area of a circle of radius r is A=πr^2.Solve for r. Please help!!!!!!!
  44. math

    The volume of a sphere depends on the sphere's radius:V=4/3πr^3.(A)If the radius of a sphere is 3 feet,what is the volume?Give exact and approximate answers and use correct units.(B)Solve for r in the volume formula.(C)If the volume of a sphere is 20
  45. math

    The volume of a sphere of radius r is V=4/3πr^3.Solve for r.
  46. math

    what is the radius of such a cone whose volume is 5π?
  47. math

    The marketing department of a textbook publisher finds that the demand for a book is related to the price according to the formula p=40-√(0.0001x+1),where x is the quantity of books sold (that is,the quantity demanded by the market) at price p.(A)If the
  48. math

    Police departments estimate the speed of a car when they are given the distance that it skidded before coming to a stop. if the road surface is wet concrete, the function s(x)=√10.5x is used, where x is the skidded distance in feet and s(x) is the speed
  49. Science

    Why is Mercury a hazard in the environment?
  50. Science

    Briefly describe Pretreatment, Primary Treatment and Secondary Treatment for municipal wastewater.
  51. Science

    Describe 3 air pollutants and the troposphere to include the effects of the pollutants on the environment.
  52. Science

    Describe 2 events in human history and in what way the events allowed human populations to grow and thrive.
  53. math

    Determine whether the equalities are true or false. 1.√2 /2=√(10 /20) 2.√11 /24=24/√11 3.2/∛3=(2/√9)/3 4.1/√2 =√2 /2
  54. math

    change the radical √(3/8) into simplest form a/b sqrt(c)
  55. math

    Rationalize the denominator and simplify if possible. √5+√3 / √5-√3
  56. math

    Multiply and Simplify.(∛x +2)(∛(x^2)-2∛x +4) Pleaseeeeee helpppppp!!!!!!! :(
  57. math

    Find an equation of the circle with center at (-9,2) and passing through (2,-2) in the form of (x-A)^2+(y-B)^2=C where A,B,C are constant. Pleaseeeeee helpppppp!!!!!!!!
  58. math

    what is the distance between (-5,0) and (-9,11)? Please helpppppp!!!
  59. math

    Find an equation of the circle with center at the origin and passing through (2,-5) in the form of (x-A)^2+(y-B)^2=C where A,B,C are constant.
  60. math

    State and prove the Pythagorean Theorem.
  61. math

    The cookie dough used by a bakery to make 2-ounce cookies contains an average of 32 raisins per pound of dough. the bakery sells cookies in bags of a dozen. suppose that customers complain if one or more of the cookies in a bag contains no raisins. over
  62. math

    Carla the baker worked four hours to make cookies. She ended with 380 cookies altogether. Write an equation to express how many cookies Carla made each hour.
  63. math

    If (-4,-2) and (2,6) are opposite points on a circle, what is the equation of the circle?
  64. math

    How do you solve this expression \sqrt[8]{v^{40}}!!! So basically it's v^40 divided by 8!!! When I typed v^5 on my homework it said that it was incorrect!!! I want to know what I did wrong!!! Pleaseeeeeeee helpppppppp!!! :(
  65. math

    Find the body surface area of a person who is 5 feet,4 inches tall and who weighs 107 pounds. Round your answer to the nearest hundredth. Use the Mosteller formula to calculate adult body surface area. Please helppppppppppppp!!!!!!! :(
  66. Math

    factor x^2/7 out of the expression x^5/7-x^2/7
  67. Math

    How do you write 8x^2 in radical form?
  68. Math

    Use algebra for 5.235235235... and 3.9999999... Also write these numbers as a fraction not a mixed number. How do I do this?
  69. Math

    Which expression or expressions are equivalent to 3^n/2^n?
  70. Math

    how do you write 225 1/2 using radical notation?
  71. Math

    |(-3x+9)/x^10| (Factor -3 out of the numerator first)
  72. Math

    the length of a cut board in a sawmill should be within 2% of the board's stated length.write an absolute value inequality that describes the length L of an acceptable board with a stated length of 12 feet.
  73. AP Chem

    A first-order reaction has a rate constant of 0.547 min - 1. How long will it take a reactant concentration 0.14 M to decrease to 0.07 M? Not sure how to do this!
  74. Math

    In a certain city, the temperature normally ranges from 20 degrees Fahrenheit and 80 degrees Fahrenheit. Write a compound inequality that describes abnormal temperature ranges for this city and then convert that inequality to degrees Celsius. F=9/5C+32
  75. Math

    The volume of a cylinder varies jointly as the height of the cylinder and the square of its radius. If the height is halved and the radius is doubled, determine the effect on the volume.
  76. AP Chem

    Which of the following conditions would most likely affect the rate of a chemical reaction? A. Increasing the number of reaction steps B. Decreasing the size of the reaction vessel C. Increasing the concentration of reactants D. Decreasing the amount of
  77. Math

    the stopping distance of an automobile is directly proportional to the square of its speed v. a car required 90 feet to stop when its speed was 70 miles per hour. find a mathematical model that gives the stopping distance d in terms of its speed v. D=
  78. Math

    when an aircraft takes off, it accelerates until it reaches its takeoff speed V.In doing so it uses up a distance R of the runway, where R is proportional to the square of the of the takeoff speed. If V is measured in miles per hour and R is measured in
  79. Math

    Suppose A is directly proportional to the square of B,and A=45 when B=3. a)Find the constant of proportionality b)Write the formula for A in terms of B c)Use your formula to find A when B=6
  80. AP Chem

    Which molecule has the strongest intermolecular forces? A. HOCH2CH2CH2OH B. CH3CH2CH2OH C. CH3CH2CH2CH3 D. HOCH2CHOHCHOHCH2OH I'm pretty sure it's C.
  81. AP Chemistry

    When does absorption occur in infrared spectroscopy? A. When the frequency of the infrared radiation is the same as the rotational frequency of the bond B. When the frequency of the infrared radiation is less than the frequency of the bond C. When the
  82. AP Chemistry

    Which of the following bonds is the most polar? A. C-F B. C-C C. C-O D. C-N I was originally going to pick C-F because F is the most electronegative, but I'm not so sure. Help?
  83. biology

    When a chromosome from one parent has a corresponding copy from the other parent, these chromosomes are said to be
  84. Maths

    The internal diameter of a spherical bowl half full is 20cm. The contents is poured into an empty cylindrical bottle with internal diameter 10cm. Calculate correct to one decimal places the depth of water in the bottle
  85. Chemistry

    How do I write 96.67673716 with its standard deviation 2.132575 to the correct number of sig figs?
  86. Math

    A sports store has 116 soccer balls. Over 6 months , it sells 8 soccer balls per month . How many soccer balls are in inventory at the end of the 6 months?
  87. Linguistics

    I am reposting this because I did not receive an answer and am still stuck. (a) The lexicon and phrase structure grammar cannot provide hierarchical structures (i.e., trees) for sentences such as the following: -A lion escaped from the zoo yesterday. -An
  88. Linguistics

    For each of the following sentences, indicate whether it has a complete hierarchical structure according to the revised lexicon and grammar (yes/no). -A cute lion escaped from the zoo yesterday. -An cute lion escaped from the zoo yesterday. -A gray eagle
  89. Linguistics

    What are three different ways an English speaker might make the borrowed Polish place name Szczebrzeszynie[ʃtʃɛbʒɛʃɨɲɛ]fit within English phonotactics?
  90. History

    Explain how Hobbes and Locke influenced the social and political landscape of Europe and the Americas.
  91. science

    what is the substrate for primase ?
  92. Math

    Luis had 8/10 meter of wood for the frame thqt he is doing. His father gave him 1/4 meter more.How many meters of wood that he have now?
  93. science

    what is the substrate for primase ?
  94. science

    how can you differentiate a peptide bond and covalent bond and wher will you find the covalent bond ?
  95. Biology

    Why is it important for hydrogen bonds to be weak? -i already tried googling it but im still confused
  96. Biology

    why does h2o have such attractive forces
  97. Biology

    Why is it important for hydrogen bonds to be weak? -i already tried googling it but im still confused
  98. Math

    The value number for 4,600,028
  99. physics

    a skydiver has amass of 140 kg.at what speed will she have a momentum of 10,000 kg m/s?
  100. history

    what was the relationship between politics and religion in medieval Europe.

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