melinda

Most popular questions and responses by melinda
  1. Precalculus

    Determine the exact value of cos 465 degrees a) √3 + √2/2 b) √2 + √3√2/4 c)√2 - √3√2/4 d)2+√2-√3√2/4

    asked on January 29, 2012
  2. Math

    Determine the maximum and minimum number of turning points for the function h(x) = -2x^4 - 8x^3 + 5x -6. Maximum:3 Minimum:1 Is this a valid reason: A quartic polynomial function has a 3 Turning points. The turning point is always 1 less than the degree.

    asked on December 9, 2011
  3. chemistry

    Na3PO4(aq) and AgNO3(aq). Write the ionic equation.

    asked on November 4, 2013
  4. Calculus

    An object is dropped from the observation deck of the Skylon Tower in Niagara Falls, Ontario. The distance, in metres, from the deck at t seconds is given by d(t)=4.9t^2 a) the height of the observation deck is 146.9 m. How fast is the object moving when

    asked on March 14, 2012
  5. Chemistry

    write isotpoic symbols of the form X-A (for example, C-13) for each of the following isotopes. **Do I add the number of protons and neutrons together to get the answer? The symbol is easy to figure out.** a) the iodine isotope with 74 neutrons B) the

    asked on February 8, 2007
  6. Chemistry

    At 20 C (approximately room temperature) the average velocity of N2 molecules in air is 1050 mph. What is the velocity of a molecule of N2? What is the kinetic energy of a N2 molecule with this velocity? What is the kinetic energy of a mole of N2? I know

    asked on March 13, 2011
  7. Calculus-help~

    A certain fast food restaurant wants to determine the increase in revenue per cheeseburger if sales are $45,000. Let the function [p=(120000-x)/(30000)] represent the price of x cheeseburgers.

    asked on March 7, 2012
  8. Physics please help?????

    The figure shows three rotating, uniform disks that are coupled by belts. One belt runs around the rims of disks A and C. Another belt runs around a central hub on disk A and the rim of disk B. The belts move smoothly without slippage on the rims and hub.

    asked on April 16, 2014
  9. chemistry

    Calculate the standared enthalpy of formation of solid Mg(OH)2 given the following data: 2Mg(s) + O29(g) →2MgO(s) ∆H = -1203.6kJ Mg(OH)2(s) →MgO(s) + H2O(l) ∆H= +37.1kJ 2H2(g) +O2(g) →2H2O(l) ∆H = -571.7kJ

    asked on March 13, 2011
  10. Chem

    A sample of an unknown biochemical compound is found to have a percent composition of 55.03 percent carbon, 5.54 percent hydrogen, 32.10 percent nitrogen and the balance oxygen. What is the simplest formula for this compound ? How do I do this?

    asked on October 4, 2012
  11. Physics

    The figure shows three rotating, uniform disks that are coupled by belts. One belt runs around the rims of disks A and C. Another belt runs around a central hub on disk A and the rim of disk B. The belts move smoothly without slippage on the rims and hub.

    asked on April 15, 2014
  12. Alliedhealth

    A woman is brought into an emergency room after a severe automobile accident. She’s unconscious and badly injured. Her husband arrives at the emergency room at the same time as she arrives in the ambulance. The doctor explains the wife’s condition to

    asked on January 24, 2011
  13. physics

    A uniform thin wire is bent into a semicircle of radius r. Determine the coordinates of its center of mass with respect to an origin of coordinates at the center of the "full" circle. Because wire is uniform x (sub cm) = 0 mass=dm length=dl coordinates

    asked on March 23, 2016
  14. Physics

    a uniform thin wire is bent into a semicircle of radius r, determine the coordinates of its center of mass with respect to an origin of coordinates at the center of the full circle

    asked on March 23, 2016
  15. physics

    A uniform thin wire is bent into a semicircle of radius r. Determine the coordinates of its center of mass with respect to an origin of coordinates at the center of the "full" circle. Because wire is uniform x (sub cm) = 0 mass=dm length=dl coordinates

    asked on March 23, 2016
  16. English

    We're studying a !@#$%^&inson poem Wild Nights-- I have a question Wild Nights--Wild Night! Were I with thee 1. Is that an example of an internal rhyme, slant rhyme, alliteration or caesura? 2. The poem has two stanzas that are ABBA and then two ABCB and

    asked on October 12, 2011
  17. Calculus-concave up and down

    Can someone explain this question to me? What intervals should I use to test whether or not the graph is concave up or down. Here is the URL for the graph. imgur dotcom/FdQCV

    asked on March 1, 2012
  18. Precalculus

    Verify these answers 1.Which of the six trigonometric functions are positive in quadrant III? Answer: tangent and cotangent -------------------------------------- 2. What is the amplitude of the function y = pi/2 sin(6/3t - pi/6) + 14? Amplitude: pi/2

    asked on January 18, 2012
  19. Math

    Someone verify if this is correct, please! 1. Draw a distance versus time graph that corresponds to the walk described below. Adam starts 8 m away from the motion sensor and walks in a straight line toward the sensor at a constant rate of 0.5 m/s for 3 s.

    asked on December 4, 2011
  20. Calculus

    Which of the following is the maximum value of the function f(x)=2sinxcosx? a) 0 b) 1 c) 2 d) No maximum value

    asked on March 8, 2012
  21. science

    could you please help me how do you write a acrostic poem for bacteria.

    asked on October 24, 2008
  22. Precalculus

    1. What two common identities are most useful for simplifying 2tanx/(sin^2x + cos^2x - tan^2x)? Two identities are: sin^2x + cos^2x = 1 and tan2x=2tanx/1-tan^2x

    asked on January 29, 2012
  23. •teaching in early chldhood programs

    When assessing the overall layout of a classroom, what two factors should be so clear that children's movement behavior will be directly influenced? A. The amount of child-accessible storage and the presence of children's art materials B. The location of

    asked on August 23, 2014
  24. •teaching in early chldhood programs

    Which of the following is a correct statement about exploratory play? A. In exploratory play, children assume primary responsibility. B. In exploratory play, who assumes responsibility depends on which learning center the activity is set up in. C. In

    asked on August 23, 2014
  25. Math

    Would someone verify these answers. 1. A person waves his hand back and forth, where their finger tips move past the starting position 4 cm in each direction. If he waves 20 times every 15s, what sine equation models the movement of the hand if the hand

    asked on January 19, 2012
  26. math

    An open-topped box is made from a rectangular piece of cardboard, with dimensions of 24 cm by 30 cm, by cutting congruent squares from each corner and folding up the sides. Determine the dimensions of the squares to be cut to create a box with a volume of

    asked on December 15, 2011
  27. science

    a 60.0kg boy runs up the stairs of a football stadium to a height of 12m above the ground 15s.what are the work and power student has done

    asked on April 10, 2013
  28. Calculus

    Vector C=5 and Vector D=8. The angle formed by C and D is 35 degrees, and the angle formed by A and C is 40 degrees. Determine |B|. Here is the image for triangle: imgur dot com/OZAwV please help, I have a test tomorrow~

    asked on March 26, 2012
  29. Math

    Would someone like to help me with these questions? Steps appreciated~ 1. If the diameter of a monster truck tire is 3.5 m and it makes one rotation every 5 seconds, how far does the tire roll in 1 minute? -------------------------------------- 2. At t=0 a

    asked on January 19, 2012
  30. precalculus

    How do I find the vertical/horizontal compression/stretch? For the graph, determine the equation of the function in the form y=a(x-h)^2+k. Then describe the transformations that were applied to y=x^2 to obtain the graph. Here is the graph: imgur dot

    asked on December 10, 2011
  31. Precalculus

    Can someone help me with this question? I got the transformation for horizontal shift and vertical shift, however, I don't know how to find the vertical/horizontal compression/stretch. 1. Describe the transformations that were applied to the parent

    asked on December 10, 2011
  32. math

    In a Garden one fourth of the plants are peppers of the pepper plants one-third are yellow peppers what fraction of the plants are yellow peppers

    asked on March 9, 2016
  33. algebra 1 part 2

    What are the minimum, first quartile, median, third quartile, and maximum of the data set? As cars passed a checkpoint, the following speeds were clocked and recorded. Speed (mph): 55 62 61 54 68 72 59 61 70

    asked on April 1, 2013
  34. Chemistry

    This is a three part problem I need help in figuring out pleaseI n each of the questions below you are going to determine a different type of balanced equation for the same reaction. Make sure your equations have the lowest whole number coefficients

    asked on October 10, 2012
  35. staticstics

    The average length of an adult blue whate is 30 meters with a standard deviation of 5.7 meters. If a sample of 31 whales is taken, what is the probability that their average lenght differs from the mean by more than 2.0 meters

    asked on October 17, 2012
  36. Chemistry

    This is a three part problem I need help in figuring out pleaseI n each of the questions below you are going to determine a different type of balanced equation for the same reaction. Make sure your equations have the lowest whole number coefficients

    asked on October 10, 2012
  37. Math

    The number of library books in a school increased by 20% after it bought new books in may. The number increased by another 20% after a bookstore donated 300 books in June. Find the number of books in the library before it bought new books in May.

    asked on January 24, 2012
  38. ◦teaching in early chldhood programs

    Which of the following is an example of an appropriate activity-plan objective? A. The child puts the story characters in sequence on the flannel board. B. The child feels good about his or her participation in the activity. C. Children think about seeds

    asked on August 23, 2014
  39. Trig

    If a plane takes off on runway 31 (N 31o W) and flies 4 miles, then makes a right (90o) turn and flies 11 miles, what bearing will the traffic controller use to locate the plane?

    asked on January 24, 2012
  40. geometry

    Express the following as a function of a single angle sin 20 degree cos 30 degree + cos 20 degree sin 30 degree

    asked on January 22, 2012
  41. Math

    I need help with this question, it says to find the instantaneous rate at distance t = 6s with the given graph First of all, it is a linear line, do i need to find the equation of the graph? After finding the equation, i plug in 5.99 and 6.01? and solve ?

    asked on December 4, 2011
  42. chemistry

    if you have 0.454 grams of sulfur trioxide, how many moles does this represent? how many molecules? how many oxygens atoms?

    asked on April 9, 2011
  43. Math

    in a rectangle the measures of the base and the altitude are in a ratio of 1:4. I f the rectangle is equal in area to a square with a perimeter of 60 feet, find the dimensions of the rectangle HELP PLEASE TYSM!!

    asked on October 7, 2014
  44. staticstics

    The average length of an adult blue whate is 30 meters with a standard deviation of 5.7 meters. If a sample of 31 whales is taken, what is the probability that their average lenght differs from the mean by more than 2.0 meters

    asked on October 17, 2012
  45. math

    round off 16,352 to the nearest tens

    asked on September 11, 2012
  46. Calculus and vectors

    Please help/verify the answer. 1. When you add vectors geometrically: a) vectors are aligned tail to tail b) vectors are aligned head to head c) vectors are aligned head to tail d) vectors are put side by side Is the answer D?

    asked on March 26, 2012
  47. Physics

    This question really has me stumped and I don't know why, I seem to have forgotten the process . . . A model electric train requires 6 V to operate. If the primary coil of its transformer has 240 windings, how many windings should the secondary have if the

    asked on November 1, 2007
  48. Precalculus

    What two common identities are most useful for simplifying 2tanx/sin^2x + cos^2x - tan^2x? Two identities are: sin^2x + cos^2x = 1 and tan2x=2tanx/1-tan^2x

    asked on January 29, 2012
  49. Math

    How to setup this equation? Find the ratio of the surface area of a cylinder to the volume of the cylinder if the height remains at 10 cm. Simplify this ratio and let f(x) = the simplified ratio. Let r be the radius of the cylinder. a) Find the average

    asked on January 15, 2012
  50. Precalculus

    How do you setup the equation for this? Thanky ou! Find the ratio of the surface area of a cylinder to the volume of the cylinder if the height remains at 10 cm. Simplify this ratio and let f(x) = the simplified ratio. Let r be the radius of the cylinder.

    asked on January 12, 2012
  51. precalculus

    Determine the maximum and minimum number of turning points for the function h(x) = -2x^4 - 8x^3 + 5x -6. Maximum:3 Minimum:1 Is this a valid reason: A quartic polynomial function has a 3 Turning points. The turning point is always 1 less than the degree.

    asked on December 9, 2011
  52. Physics

    Please help- A small fish is dropped by a pelican that is rising steadily at 0.50 m/s. How far below the pelican is the fish after 2.5 s? Answers. 61m 29.3 30.6 1.1m I just started school and I'm totally lost-If someone could explain formula to me I'd

    asked on September 5, 2010
  53. teaching in early chldhood programs

    Which of the following is an example of an appropriate activity-plan objective? A. The child puts the story characters in sequence on the flannel board. B. The child feels good about his or her participation in the activity. C. Children think about seeds

    asked on August 23, 2014
  54. algebra

    y = 5x, solve for x

    asked on November 15, 2012
  55. math

    At Thanksgiving dinner, Deborah ate a portion of turkey (673 calories;masch potatoes (408 calories);stuffing (519 calories); cranberry sauce (219 calories);beans (278 calories); and pumpkin pie (523 calories); approximately how many calories did she

    asked on September 11, 2012
  56. Calculus and vectors

    A parallelogram is formed by R^3 by the vectors PA=(3,2,-3) and PB=(4,1,5). The point P=(0,2,3). a) what are the location of the vertices? b) what are the vectors representing the diagonals? c) what are the length of the diagonals?

    asked on March 23, 2012
  57. Calculus-derivatives

    Determine the derivative for y=tanxcosx a) y'=-sinxtanx + cosxsec^2x b) y'=-sinxtanx + cosxtanx c) y'=cosxsec^2x d) y'=sinx - cosxsec^2x

    asked on March 8, 2012
  58. Math

    I have no clue what to do on these questions. 1.Two resistors a and b are connected in parallel. The total resistance R in such a circuit is found by formula R= 1/a + 1/b. If R=5/6 ohms and b is one more ohm than a, find the number of ohms in a and b. 2.

    asked on January 10, 2012
  59. precalculus

    Can someone verify if my answer is right? 1. Which function has a negative average rate of change on the interval 1

    asked on December 3, 2011
  60. algebra

    how do you do this problem? perform indicated operation write answer as a fraction, simplify. 1/11+ 5/6

    asked on November 18, 2011
  61. Spanish-7th grade-Please check my answers

    Could someone check these please?I had place a possessive adjective in place of el 1. El hermano de Juan y Pedro se llama Bret Answer: Su hermano se llama Bret 2.Replace los with possessive Los hermanos de Paco y Linda se llama Santiago y Jose Answer: Sus

    asked on March 1, 2011
  62. geometry

    When finding the perimeter of a figure on a grid,whydo you not count the spaces inside tha grid?

    asked on January 26, 2011
  63. GRAMMAR/SENTENCE STRUCTURE

    John Darsee has been one of many scientists and researchers involved with the scandal of scientific misconduct, where he deliberately falsified data and published his results to scientific journals. First, I will discuss the case of John Darsee, as well,

    asked on October 13, 2007
  64. PHILOSOPHY REPOST

    need to apply the moral theory of rule utilitarianism in my essay but i don't really understand what it is. i tried google and wiki but it doesnt really provide me with clear meaning, or examples. could someone please explain to be as simple as possible

    asked on October 12, 2007
  65. math

    subtract 345 from 678

    asked on September 11, 2012
  66. Calculus and vectors

    Do the vectors (2,0,1),(-2,0,0) and (2,3,0) lie on the same plane? Explain your reasoning.

    asked on March 26, 2012
  67. Precalculus

    What am I doing wrong? I keep getting 48 and its wrong... Solve 2log(x)-log(4)=3log(4) 2log(x)-log(4) log(x/4)=3log4 log(x/4)=log12 x=48

    asked on January 30, 2012
  68. Precalculus

    Verify these answers please. 1. Which of the following functions would f(x) = log(base 10)x horizontally 4 units to the left? a) f(x)=log(base10)(x-4) b) f(x)=4Log(base10)X c) f(x)=log(base10) x+4 Answer: C ------------------------------------ 2. State the

    asked on January 29, 2012
  69. Precalculus

    Can someone help me with this question (It's a graph) imgur dot com/r16ba One of the answers would be: x= 2 not x=-2 (If you think its an unsafe website, type in google "Imgur," it'll show you that its a site to post images)

    asked on January 12, 2012
  70. Precalculus

    Can someone help me with this question (It's a graph) imgur dot com/r16ba One of the answers would be: x= 2 not x=-2

    asked on January 11, 2012
  71. geometry

    find the value of following sin(cos^-1 12/13) give your answer as a fraction

    asked on January 11, 2012
  72. geometry

    find the value of following sin(cos^-1 12/13) give your answer as a fraction

    asked on January 11, 2012
  73. precalculus

    How do you do this question? 1. A speed versus time graph shows the segment from (3, 4) to (8,4). The units for the vertical axis are m/s. If the object whose speed was being graphed is 8 m away from the point from which measurements are made at t= 3s, how

    asked on December 3, 2011
  74. Math

    Please help! What is the solution of 5 - 2x is greater than -3 OR -3x + 9 is less than -6 Thank you

    asked on September 7, 2010
  75. Computers in Business

    I am in need of help with Microsoft Office Access 07. I am trying to set relationship tables and I have to enforce referential integrity on all 4 of my tables and cannot get it to work. What do I need to do? Thanks

    asked on April 22, 2008
  76. grammar/sentence structure

    would someone please check over my paragraphs for any grammatical errors, and more importantly, correct sentence structure? I was told I was bad at both... thank you so much in advance! The case of scientific fraud I would like to discuss extensively is

    asked on October 13, 2007
  77. teaching in early chldhood programs

    Which of the following is a common mistake new teachers make when setting up learning centers? A. Planning specific activities for blocks or dramatic play B. Introducing the centers to children so they know how to use them C. Allowing the children to

    asked on August 23, 2014
  78. What is a biology lab practical?

    Is it a test on paper or can I look at notes and answer questions? Do I have to dissect something, have the TA ask me a question and answer instead of dissecting as a group? I've just been quizzing myself on parts of the animal in case we can't use notes,

    asked on April 8, 2014
  79. Finance

    Stephenson Real Estate Capitalization

    asked on November 28, 2012
  80. math

    solve the problem 456 + 65.

    asked on September 11, 2012
  81. math

    randall opened a savings account on June 1st and made the following deposits: $212.19, June 5th $23.03, June 12 $307.15, June 19th $652.00 and June 30, $78.75. Assuming he made no withdrawals, approximately how much did he have in the savings account at

    asked on September 11, 2012
  82. Calculus

    If a(0,-1,3)+b(1,1,1)-c(1,2,5)=(-2,3,-8), determine a,b,c Is this the correct answer: a= -4, b= -3, c= -1?

    asked on March 25, 2012
  83. Calculus

    If a(0,-1,3)+b(1,1,1)-c(1,2,5)=(-2,3,-8), determine a,b,c

    asked on March 23, 2012
  84. Precalculus-Verify

    log(base2)x-log(base2)6= log(base2)5+ 2log(base2)3 log(x/6)=3log15 (x/6)=15^3 6*(x/6)=15^3*6 x=15^3*6 =20,250 Answer is 270.... What did I do wrong...

    asked on January 30, 2012
  85. Precalculus

    Given the parent function f(x)log(base10)x, state the equation of the function that results from a vertical stretch by a factor of 2/5, a horizontal stretch by a factor of 3/4, a reflection in the y-axis , a horizontal translation 2 units to the right, and

    asked on January 30, 2012
  86. Precalculus

    Given the parent function f(x)log(base10)x, state the equation of the function that results from a vertical stretch by a factor of 2/5, a horizontal stretch by a factor of 3/4, a reflection in the y-axis , a horizontal translation 2 units to the right, and

    asked on January 29, 2012
  87. Precalculus

    Explain how to do these please. 1. solve x=log(base2)*1/8 by rewriting in exponential form. 2. Solve log(3x+1)=5 3. Solve log(base x)8=-1/2

    asked on January 29, 2012
  88. Precalculus-helpp

    Verify if my answers are correct. 1. The function y=x^3 has undergone the following sets of transformations. If y=x^3 passes through the points (1,1), (3,27) and (4,64), list the coordinates of these transformed points on each new curve. a) reflected in

    asked on December 11, 2011
  89. Precalculus

    Verify if my answers are correct. 1. The function y=x^3 has undergone the following sets of transformations. If y=x^3 passes through the points (1,1), (3,27) and (4,64), list the coordinates of these transformed points on each new curve. a) reflected in

    asked on December 11, 2011
  90. precalculus

    Determine the x-intercepts of the polynomial function y=-6(x+7)^4 + 5. Round to two decimal places, if necessary. y=-6(x+7)^4 + 5 0=-6(x+7)^4 + 5 -5=6(x+7)^4 -5/6 =(x+7)^4 There are no x-intercepts??

    asked on December 9, 2011
  91. geometry

    in a diagram of a scalene triangle ABC, line DE is the midpoint of line AB and line AC and DE=7 find the length of line BC

    asked on December 5, 2010
  92. Math

    Solve the following system of equations. x + 4y= 8 (1) x=5-4y (2) What is the solution of the system? (Type an ordered pair. Type N if no solution).

    asked on August 2, 2008
  93. math

    I need help in math can you help me in math.

    asked on November 19, 2007
  94. math

    I need help in math can you help.

    asked on November 19, 2007
  95. essay edit

    sorry to do this to you, gurublue, but i had to break it up into different pieces...this is the last one, i swear!! The scientific misconduct case of John Darsee is wrong and immoral, based on the moral theory of rule utilitarianism. I will argue why this

    asked on October 13, 2007
  96. Math

    Given; a=2.52, c=4.75 find the remaining parts of the right triangle. I found b which equals 4.03 but need help with the angle. We already know that one angle = 90 since its a right triangle. I just need to know angle A. Angle A = a)58 degrees b)32 degrees

    asked on March 10, 2007
  97. Math (triangles)

    Given b=48, A=36 degrees find the remaining parts of the right triangle. B= a)144 degrees b)154 degrees c)54 degrees d)64 degrees We know that one angle equals 36 and since it is a right triangle another must equal 90. The sum of the angles of a triangle

    asked on March 9, 2007
  98. economics

    Business leaders in a small but thriving community in the southeast have noticed a considerable increase in the alcohol consumption of their workers. This increase, they claim, reduces worker productivity, increases absenteeism and jeopardizes safety on

    asked on November 28, 2006
  99. Basic Geometry

    What does ' mean? ie. triangle abc is congruent to triangle a'b'c'

    asked on October 20, 2014
  100. Algebra

    If 6 is a root of the equation x^2-8x+k=0, find the value of k.

    asked on September 11, 2014

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