1. Math - Calculus

    The identity below is significant because it relates 3 different kinds of products: a cross product and a dot product of 2 vectors on the left side, and the product of 2 real numbers on the right side. Prove the identity below. | a × b |² + (a • b)² =
  2. 8th grade math

    Find the interest earned on each account. $970 at 4 1/2% simple interest for 2 years. I don't know if I solved the problem correct please help: I = p x r x t = 970 x 0.42 x 2 = 814.8 I don't know what number to convert 1/4 to!
  3. English

    1. He was surprised she came at all. 2. He was surprised she came after all. 3. He was surprised she came anyway. 4. He was surprised she came any how. 5. He was surprised she came at any rate. 6. He was surprised she came at all events.
  4. Chemistry

    2 Al(s) + 3 Cl2(g) → 2 AlCl3(s) Into a cylinder with a moveable piston (pressure stays constant), a piece of aluminum is placed and chlorine gas is added. After they react, the temperature inside the piston is considerable higher than its initial
  5. Multivariable calculus

    I have to show that the relative error of the product of two positive numbers is aproximately to the sum of the relative errors of its factors. My teacher told me to use first order approximation, but I don't know how to use it.Please help
  6. Pre-Calculus Graphs expansions/compressions

    Need help with this question, don't get it. Given the relation x^2+3x=y^2-2y, what is the new relation if it has undergone: A. vertical expansion by 2 B. Horizontal expansion by 3 C. Vertical compression by 4/5 D. Horizontal compression by 1/5 E.
  7. Calculus

    Find two numbers such that the sum of the first plus three times the second is 600 and their product is a maximum. x + 3y=600 xy is a max. This is the problem statement. let U be the function equal to xy. U=xy = y(600-3y) Now, maximize U (take derivative,
  8. statistics

    {Exercise 3.55} Morningstar tracks the total return for a large number of mutual funds. The following table shows the total return and the number of funds for four categories of mutual funds (Morningstar Funds500, 2008). a. Using the number of funds as
  9. Physics

    Consider a disk of radius 2.6 cm with a uniformly distributed charge of +3.6 µC. Compute the magnitude of the electric field at a point on the axis and 3.3 mm from the center. The value of the Coulomb constant is 8.98755 × 10^9 Nm2/C2. Answer in
  10. Product Rule

    Can someone please help me with this? f(x)=(x-2)^1/2 * (x^2-3)^3 find f'(x) using the product rul. This is what I came up with I just need to know if I did it right. f'(x)=(x-2)^1/2*3(x^2-3)+(x^2-3)^3*(1)^-1/2 Hopefully I did. Thanks. no. You are not using
  11. Math

    At a quality control checkpoint on a manufacturing assembly line, 8% of the items failed check A, 10% failed check B, and 2% failed both checks A and B. a. If a product failed check A, what is the probability that it also failed check B? b. If a product
  12. Math

    At a quality control checkpoint on a manufacturing assembly line, 8% of the items failed check A, 10% failed check B, and 2% failed both checks A and B. a. If a product failed check A, what is the probability that it also failed check B? b. If a product
  13. Math

    At a quality control checkpoint on a manufacturing assembly line, 8% of the items failed check A, 10% failed check B, and 2% failed both checks A and B. a. If a product failed check A, what is the probability that it also failed check B? b. If a product
  14. math

    Norar compute three diffrent answers?r has 1,555 songs on her computer. S are therehe rounds this number to the nearest ten, to the nearest hundred and the nearest thousand. She gets three diffrent rounded numbers. What are the numbers? Why
  15. physics

    Compute the average number of interactions per bunch crossing for a luminosity L=2.5E31 cms-1,if the total cross section is sigma =20mb and bunch crossing occur every T=4.What is the probability of having zero interactions in a bunch?
  16. understandingof a word

    I am having a hard time understanding a word this is used to show me one of the key features of language. can anyone give an example or explain this to me because i am real confused I was at an understanding that Arbitrary was somethig said that was not
  17. Basic Statistics

    In each of the following situations state whether or not the given assignment of probabilities to individual outcomes is legitimate, that is, satisfies the rules of probability. If not, give a reason a) roll a die and record the count of spots on the
  18. math, bobpursley

    so how did you say to do part c c) if there is 2 woman and 5 men in the group, how many delegations would include at least 1 woman? would it be the answer to part a minus the number of 2 man pairs which will give me: 21 - 5combination 2 = 21-10 = 11 Ooops,
  19. 12th grade

    prove that normal to plane containing 3 points whose position vectors are a vector,b vector,c vectorlies in direction addition of cross product of vectors b and c and cross product of vectors c and a and cross product of vectors a and b
  20. Math-Ms. Sue

    The number of dry cleaning orders picked up at Sunny Fresh Dry Cleaners was sampled over 12 hour periods. Below is the sample: 142 171 125 91 140 125 97 125 162 142 125 117 89 125 140 128 From this data set, compute the sample mean, median, mode and
  21. lcm

    find the least common mutlipe of 420 196 Break down each number into prime number factors 196 = 2*2*7*7 420 = 70*2*3 = 2*2*3*5*7 The least common multiple is the product of all prime factors that occur in both numbers 2*2*3*5*7*7 = 2940
  22. Math - Finance

    Product A This product will take 2 years to develop, at a cost of $100,000 in the first year (Yr 0) and $50,000 in the second. Revenue (benefits) in subsequent years is expected to be $100,000 per year. Product B This product will only take a year (Yr 0)
  23. Chemistry

    Factors affecting reaction rate. Use collision theory to explain. Factor: nature of the reactant Affect on rate: more or less reactive based on its chemical identity. reactivity: aq>g>l>s Explanation: For the other factors, we had to explain it
  24. administration of imaging department

    As a supervisor or head of radiology department put us your plan ,or do you see section as follows: 1- The number of devices and rooms 2- Number of employees 3- Plan to work with the staff and the hospital administration 4- Diagram show of the department
  25. Math(Probability) need help

    Three drugs are being tested for use as the treatment of a certain disease. Let p 1 , p 2 , and p 3 represent the probabilities of success for the respective drugs. As three patients come in, each is given one of the drugs in a random order. After n = 10
  26. maths

    leanne put 6 counters into a bag she took out some counters from the bag but not all of them. what is the ratio of the number of counters taken out from the bag to the number of the counters left in the bag. make a list of all the possible ratios using the
  27. Math

    1. Simplify the radical Sqr of 3c² over the sqr of 27 √ ̅3c² --------- √ ̅27 2. Simplify the radical √27 ∙ √3 3. Simplify the radical √ ̅75 - 4√ ̅75 4. Simplify the radical (√3 + √2)²
  28. Math

    1. Simplify the radical Sqr of 3c² over the sqr of 27 √ ̅3c² --------- √ ̅27 2. Simplify the radical √27 ∙ √3 3. Simplify the radical √ ̅75 - 4√ ̅75 4. Simplify the radical (√3 + √2)²
  29. algebra 2 review

    Condense the expression: 1/5log3(32) - 2log3x + 1/2log3y I can't put the 3 as a small number on the bottom on all 3 parts of the trinomial.
  30. algebra 2 review

    Condense the expression: 1/5log3(32) - 2log3x + 1/2log3y I can't put the 3 as a small number on the bottom on all 3 parts of the trinomial.
  31. algebra 2 review

    Condense the expression: 1/5log3(32) - 2log3x + 1/2log3y I can't put the 3 as a small number on the bottom on all 3 parts of the trinomial.
  32. Soc. Studies

    A boundary was set between Canada and the United States as a result of? A. the Convention of 1818 * B. the Louisiana Purchase C. the Missouri Compromise D. the Monroe Doctrine I think A is the answer but the question is "as a result of" so I question B?
  33. chemistry

    calculate delta G at 298 K when 5.0 atm H2 and 3.0 atm of CO2 are converted to methanol. I know you can calulate for Q and use that but how do you do the calculation when you don't have the atm for the final product.
  34. English

    1. You grew so much the last few days. 1-1. You grew so much for the last few days. (Was 'for' omitted in #1? Are both OK?) 2. I am ready to go abroad. I am ready for going abroad. I am ready for the trip. I am ready for soccer. I am ready for playing
  35. algebra

    -Alan sold his bike to Dan making a 20% profit. Dan sold the bike to Carol for $180 which was a 25% profit for Dan. How much did Alan originally pay for the bike? - A positive number is increased by 20%. This new number is now decreased by 20%. To obtain
  36. accounting

    A paraglider manufacturer makes a standard model and a custom model. using the companys activity-based costing system compute customer margin. activity cost pool activity rate Supporting manufacturing $20 perdirect labor-hour Orderprocessing $194 per order
  37. Physics (Help Please)

    Most of us know intuitively that in a head-on collision between a large dump truck and a subcompact car, you are better off being in the truck than in the car. Why is this? Many people imagine that the collision force exerted on the car is much greater
  38. Finite

    One coin is fair and one is weighted so that Pr[H]=211. You randomly select one of the two coins, and flip it 5 times, noting the result of each flip. What is the expected number of heads?
  39. math

    Kalil flipped a coin sixty times. He got thirty-four heads. How does this result compare to the number of heads you would have expected based on theoretical probability?
  40. Pre-Calculus

    Need help with this question, don't get it. Given the relation x^2+3x=y^2-2y, what is the new relation if it has undergone: A. vertical expansion by 2 B. Horizontal expansion by 3 C. Vertical compression by 4/5 D. Horizontal compression by 1/5 E.
  41. managerial economics

    The cost function for a firm is given by TC = 500 + Q2. The firm sells output in a perfectly competitive market and other firms in the industry sell at a price of $100. a) What price should the manger of this firm put on its product? b) What level of
  42. biology

    A man is heterozygous for two genes (R and L) that are located on different chromosomes. Which of the following processes would result in different combinations of the alleles for these two genes in his sperm? a) fertilization b) independent assortment c)
  43. 8th grade math

    dividing fractions....how do i solve this... 4/9 divided by 2/3= or 9/10 divided by 9/10= One thing I do remember is how to divide fractions! 4/9 divided by 2/3 = 4/9 multiplied by 3/2 Then once you've multiplied across, reduce the resulting fraction if
  44. math

    Of the last 88 contestants on a game show, 32 won a prize. What is the experimental probability that the next contestant will win a prize? Simplify your answer and write it as a fraction or whole number
  45. finite

    0/20 points | Previous Answers TanFin11 4.1.034. Ask Your Teacher My Notes Question Part Points Submissions Used A company manufactures two products, A and B, on two machines, I and II. It has been determined that the company will realize a profit of
  46. Math

    A chessboard has 8 rows and 8 columns. A rook and a bishop are put randomly and with equal probability among all pairs of squares of the board. a. What is the probability that the two pieces are put on the squares (1,1) and (1,2)? b. What is the
  47. math 4th grade

    If Sally gave a survey with five colors listed and ask each person who takes the survey to pick one color. She assumes that the results if given to 24 persons the results would be 1/2 blue, 1/12 red, 1/8 blue, 1/4 green, and 1/24 orange. What number of
  48. tech III math ( ACT Prep)

    A neon sign flashes every 4 seconds, another neon sign flashes every 6 seconds. If they flash together,how manyseconds later will they flash together again?
  49. math final studying

    a triangular road sign has a height of 8 feet and a base of 16.5 feet.how much larger in area is this sign than one with a height of 4 feet and a base of 8.25 feet?
  50. English

    1. As the New Year approaches us with hopes anew, here is to wishing you and your family a wonderful year ahead. 2. As the New Year dawns, I hope it is filled with the promises of a brighter tomorrow. Happy New Year! [Thank yu for your help. What is the
  51. Statistics

    Having trouble with these four questions: 1. Given the rules of the different games of chance described in the sheet you downloaded, think about your odds of winning in each of these three scenarios: A. Craps: Either roll or a 7 or 11 on the first roll, OR
  52. Algebra (Re.: Reiny)

    The fact that there was that nice symmetry to the question, makes it easier than it first appears. I had it as: (a/b + b/a)÷(b/a - a/b) look at (a/b + b/a) the common denominator for this would be ab, so a/b + b/a = (a^2 + b^2)/ab similarly for (b/a -
  53. English

    The officer asked his subordinates to put their files away after completing in good shape. John asked his son angrily, why he didn't put his books away after reading it. John asked his friend Joe not to put his books away as he would still to read it.
  54. math

    The manager turns the restaurants two neon signs on at the same time both signs blink as theyaare turned on. One sign blinks every 9 seconds and one sign blinks every firfteen seconds. How many seconds will they both blink together again?
  55. math

    4. What are the coefficients in the polynomial 7x^2 - 4x + 6? A. -7, 4 B. 7, 4, -6 C. 7, -4, 6 D. 7, -4 7. Suppose you earned 6t + 2 dollars on Monday and 9t - 6 dollars on Tuesday. What were the total earnings? Simplify your answer. A. 15t - 4 B. 15t + 8
  56. math,correction from previous post

    can someone please correct this for me thanks. simplify: 7sqrt(7x) + 5 sqrt (7x) My work: (7+5)sqrt (7x) My answer: 12sqrt (7x) is this correct? yup so i don't have to take out the x from the radicand Nope. 7x + 5x = 12x No matter what "x" is.
  57. algebra

    evaluate each function for the value specified.fx+x2-7x+10; find (a)f(0),(b)f(5),and(c)f(-2). can any one help me withthis i have not the first clue how to begin here. What you wrote is nonsense. Did you mean f(x)=x2-7x+10 ? If so, f(0)= put zero in for x,
  58. Grade 7 Social Studies

    DOES ANYONE KNOW THE ANSWERS TO ANY OF THESE QUESTIONS? 1. What was one important political result of the Canadian constitution of 1982? 2. What happened as a result of the Russian Civil War? 3. Why were the European countries looking for a new route to
  59. tourism and hospitality

    After a business chooses a product or service to produce, it must decide _____________________________. what price to charge for it how it will give the product information to the consumer where to sell it all of these i think its d
  60. chemistry

    A 2.000 g sample of magnesium was burned in air to form an oxide. After the product was purified it was found to have a mass of 3.317 g. What is the empirical formula for the product?
  61. marketing

    Explain the importance of an organized new-product development process and illustrate how it might be used for. a. A new care product b. A new children’s toy and c. A new subscribers-only cable television channel
  62. Chemistry

    When 6.0L of H2 reacts with 2.0L of N2, 4.0L of gaseous product are formed. All volumes of gases are measured at the same temperature and pressure. What is the formula of the product? Hint: Assume all reactants are consumed.
  63. math

    i can figure this out -2+|-5+6| i try inverse but im still getting it wrong ive been stuck on this fo awhile There is no inverse in the equation. the |...| means absolute value. We perform what is indicated in the |,,| and that is +1. The absolute value of
  64. 8th grade algebra: radicals

    please help me solve these 1. 2√5/8 + 4√3/8 - 1/2√68 2. √4k-5 +1=8 (the radical sign goes over 4k-5) 3. (x+4)*2 /3 =8 4. Write the value of the discriminant of each equation. Then use it to decide how many different real-number
  65. physics

    Here's a physics problem. I don't care about the answer, i just want to know how to do it. don't have to be too detailed.. but i don't really kno how to start this 1.) A model rocket blasts off from the ground rising straight upward with a constant
  66. Chemistry

    I am figuring out how many moles of CU2SO4 are in 485.6 grams. How would you set up the proportion for this? What would the answer then be. Thanks. I really need an example to jumpstart this worksheet.
  67. english essay

    i need help with figuring out the satirization of Huck Finn. such as with the word choice/ dialect he uses and the irony in the book.
  68. organic chemistry

    in figuring the percent yield of isoborneol reduced from camphor...is the ratio 1:1, i can do the calculations if i could determine this
  69. Math

    I am having trouble figuring out how to do partial derivatives. I have tried practice problems and have read my textbook but I am still so confused. Could someone please explain how to do this? Thank you.
  70. Algebra 2

    Find the number of decibels for the power of the sound given. Round to the nearest decibel. A rocket engine, 2.64 cross product 10−5 watts/cm2
  71. Algebra

    Find the number of decibels for the power of the sound given. Round to the nearest decibel. A rocket engine, 2.32 cross product 10−5 watts/cm2
  72. Algebra

    Find the number of decibels for the power of the sound given. Round to the nearest decibel. A rocket engine, 2.68 cross product 10−5 watts/cm2
  73. math104

    Find the number of decibels for the power of the sound given. Round to the nearest decibel. A rocket engine, 2.64 cross product 10−5 watts/cm2
  74. 7th grade

    If a man says he has three children who's ages are the product 36,the sum is the house number across the street and his oldest son loves chocolate cake,how old are the kids?
  75. geometry

    So On the first day of school I went to geometry and we did a review. My teacher had us work out this problem and I've never seen it before. Other kids were doing the problem and I was just there confused. I was embarrassed and didn't want to ask for help.
  76. College Physics

    Most of us know intuitively that in a head-on collision between a large dump truck and a subcompact car, you are better off being in the truck than in the car. Why is this? Many people imagine that the collision force exerted on the car is much greater
  77. Vectors

    When do you use the dot product and the cross product?
  78. math

    what are the partial product and the product of 18x4
  79. Math

    Is the product of 0.02 x 0.02 the same as the product of 0.2 x 0.002? EXPLAIN.
  80. Algebra

    The product of x and 3 plus the product of 7 and y plus z times 4 is equal to 3.
  81. math

    how could i use the product 10 x 42 = 420 to find the product of 5 x 42?
  82. Marketing

    what is product development and what is product pentration
  83. Chemistry

    Give the enthalpy change and entropy change values shown below calculate the free energy change for this reaction at 25 degrees C using Gibbs free energy equation. How does this value compare to the free energy change using the standard free energy of
  84. C++

    Using C++ (if, char or Boolean) Write a program that asks the user for a two digit number and then prints the English word for that number. Sample run: Enter a two-digit number: 45 You entered the number forty-five. PLAN: Read the number entered as an
  85. Algebra

    Library Research Assignment Please help with Discussion board problem Suppose that the number of new homes built, H, in a city over a period of time, t, is graphed on a rectangular coordinate system where time is on the horizontal axis. Suppose that the
  86. chemistry

    hi, Im not sure how to explain this well but here goes. Im doing a oxidization/reduction reaction to determine the charge of an element. charge is n formula n=a/b Problem: 0.6215 g sample of nickle metal was dissovled in 100.0ml of fe 3+ Note for the
  87. economics

    Suppose there are two goods. The demand for good 1 is q1=a-bp1+ep2 and the demand for good two is q2=a-bp2+ep1. a and b are strictly positive, |e|<b (1)Compute the optimal prices, and the Lerner index and inverse elasticity of demand for each good.
  88. math

    This question says to graph the linear function.y=1\3x-4. What would the graph look like? Thank you Reiny but they put me in this class and I can not figure out what to do. When I am for help they are always to busy to help me my mom when talked with the
  89. English (Dracula)

    I am making a Wanted Poster of Dracula and i don't know what statement to put about him below the picture of him. i was thinking like: Evil Count and Blood Thristy
  90. Trigo

    From a window of a building A, the angle of elevation of the top of building B is 35 degrees and the angle of depression of the bottom of building B is 20 degrees. If the buildings are 25m. horizontally apart, Compute for height of the window from the
  91. phyics

    A car takes 11 s to go from v=0m/s to v = 22 m/s at constant acceleration. If you wish to find the distance traveled using the equation d=1/2at2, what value should you use for a? Please help on this i don't know what i should put i think m/s squared but i
  92. POLL - everyone is welcome to answer

    So I am home schooled but it says to ask classmates, which I don't have so I am resorting to the internet. The question is: What do you trust and mistrust about the federal government ? I am also suppose to put the results into a bar graph. How would I set
  93. Accounting

    1. The company uses a job-order costing system. How would you recommend that manufacturing overhead cost be assigned to production? 2. Recompute the company's unit product costs in accordance with your recommendations in (1) above. Direct
  94. Math-Distributive Property

    Use the distributive property to simplify: 3(m-1)-(2m+1)How would you do this? This is all I have 3m-1-2m+1 I don't know if that right or what to do from there. Your help is greatly appreciated.
  95. Programming C++

    #include<stdio.h> #include<conio.H> { clrscr(); int first_value; int second_value; long result; print f("enter your first value:); scanf("%d",&first_value); printf("enter your second value:); scanf("%d",&second_value:);
  96. Physics

    HI! :( Im sorry to bother you guys but I need help on only these three questions. I'm not trying to cheat but these three are really confusing. This is the first time I've ever asked for help on the internet haha. Please don't be upset I promise this is
  97. Math

    I have the same problem as Marita. Can someone tell us what equation to use. Horizon has a cell phone plan for $28.00 per month plus $.30 per minute with unlimited anytime network minutes and a free flip phone for new customers. How do I put this in an
  98. maths

    The Number Two Plumbing Co. charges $45 per hour plus a fixed service call charge of $65. Write an equation that will allow you to compute the total bill for any number of hours, x, that it takes to complete a job. A. C = 45x + 65 B. C = 65x + 45 C. 65x +
  99. Calculus

    Sorry for posting another quesiton..; f(x) = { -7x^2 + 7x for x<=0 { 3x^2 + 7x for x>0 According to the definition of derivative, to compute f'(0), we need to compute the left-hand limit lim x-> 0− = _____ and the right-hand limit lim
  100. Probability and Statistics

    For questions 6 - 10 use the chi-squared distribution to test the hypothesis. 6) A restaurant owner wants to see if the business is good enough for him to purchase a restaurant. He asks the present owner for a breakdown of how many customers that come in