Questions Asked on
July 17, 2013

  1. poem

    write a acrostic poem on continents. C O N T I N E N T S

  2. Physics with Calc

    A highway curve forms a section of a circle. A car goes around the curve as shown in the helicopter view of Figure P1.48. Its dashboard compass shows that the car is initially heading due east. After it travels 840 m, it is heading 35.0° south of east.

  3. statistics

    A sample of 100 iron bars is said to be drawn from a large number of bars. Whose lengths are normally distributed with mean 4 feet and S.D 0.6ft. If the sample mean is 4.2 ft, can the sample be regarded as a truly random sample?

  4. Chemistry

    What mass of KIO3 is needed to convert the copper in 0.200g of CuSO4.H2O to Cu(IO3)2? my answer is: 0.828g Cu(IO3)2 x (2*214.003 MolarM KIO3/ 413.36 MolarM Cu(IO3) = 0.857g KIO3 could you please check if i got it right

  5. math-statistics

    The following risk ratios give the increased risk for various diseases comparing two groups (exposed vs. unexposed). a. 2.5 (2.0, 3.0) b. 1.03 (1.02, 1.04) c. 6.0 (.85, 9.8) d. 0.98 (0.88, 1.08) e. 0.20 (.05, 1.05) Which risk ratios are statistically

  6. Chemistry

    1. Write the formula for these compounds: a) sodium tris(oxalato)rhodium(III) b) sodium tetrachloroplatinate(II) c) triamminetrichloronickel(IV) sulfate For a) I put: Na3Rh(C2O4)3, however got an error message of this: "Your answer appears to be missing

  7. math

    Express 2 lg 3√x - lg 4/3x^2 + log(100)4x^3 in the form a lg x + lg b ,where a and b are constants .

  8. Chemistry

    Identify the type of structural isomerism that exists in each of the following pairs of compounds. (a) [CoCl2(NH3)4]Cl·H2O and [CoCl(NH3)4(H2O)]Cl2 coordination isomerism geometrical isomerism hydrate isomerism ionization isomerism linkage isomerism

  9. Solution Set

    Find the solution of |x-2|>8 The answer is {1,4} how?

  10. algebra

    using formula d(h)=8e^-0.4h to determine the milligrams d of a certain drug in bloodstream h hours after given.how many milligrams will be present after 6 hours?

  11. math

    Two cars begin driving toward each other from towns that are 150 miles apart. The first car is traveling 45 miles per hour, and the second is traveling 55 miles per hour. If each leaves at 2:15 pm, when will the two cars pass on the road?

  12. math

    If # is a binary operation defined by a # b = maximum of { a, b } or a max b, find the value of 5 # 3.?

  13. math

    A box contains 5 blue and 4 red marbles. In how many ways can 4 marbles be drawn so as to include 2 red marbles?

  14. math

    given that log(4) 3 = a and log(4) 5 = b ,express 375 in terms of a and/or b .

  15. math

    A boy travels on his bicycle at the rate of 6 miles per hour and his sister on hers at the rate of 5 miles per hour. They start at the same time and place and travel over the same road in the same direction. After traveling for 3 hours, the boy turns back.

  16. physics

    A clock is made out of a disk of radius R=10 cm which is hung by a point on its edge and oscillates. All of a sudden, a circular part right next to the hanging point of radius R/2 falls off, but the clock continues oscillating. What is the absolute value

  17. Physical Science

    Which of the following would reduce the resistance of a metal wire? A. increasing its thickness B. increasing its temperature C. increasing its length

  18. Chemistry

    Identify the type of structural isomerism that exists in each of the following pairs of compounds. (a) [CoCl2(NH3)4]Cl·H2O and [CoCl(NH3)4(H2O)]Cl2 coordination isomerism geometrical isomerism hydrate isomerism ionization isomerism linkage isomerism

  19. Chem

    Fingernail polish is mainly acetone (C3H6O) and has a density of 0.788gcc. A. HOW MANY GRAMS OF ACETONE ARE IN A O.5L BOTTLE B HOW MANY MOLECULES OF ACETONE ARE IN THAT SAME BOTTLE

  20. chem

    A gas has a volume of 4.40L at 0∘C. What final temperature, in degrees Celsius, is needed to change the volume of the gas to each of the following, if P and n do not change?

  21. Calculus

    The management of Lorimar Watch Company has determined that the daily marginal revenue function associated with producing and selling their travel clocks is given by R '(x) = -0.003x + 12 where x denotes the number of units produced and sold and R '(x) is

  22. math

    In a group no. of boys is48/5, no of girls is 32/5 and no. of techer is 2. Find the ratio of boys, girls and teacher?

  23. chemistry help

    A gas has a volume of 4.40L at 0∘C. What final temperature, in degrees Celsius, is needed to change the volume of the gas to each of the following, if P and n do not change? 1400mL

  24. math

    Please check for me: Solve the questions below and identify them as experimental or theoretical. a. A baseball player reaches base 35% of the time. How many times can he expect to reach base in 850 at-bats? Theoretical – P(reaches base) = X/850 X/850 *

  25. math

    A commuter train travels the distance from Acton to Boston in 1 hour and 10 minutes. If the train is traveling at an average speed of 48 miles per hour, what is the distance between the two cities?

  26. Vocabulary

    Building and construction A. Architecture B. Engineering C. Nursing D. Statistics im pretty sure its A

  27. Chemistry

    A 10.0 mL solution of 0.300 M NH3 is titrated with a 0.100 M HCl solution. Calculate the pH after the addition of 20.0 mL of the HCl solution. (potentially useful info: Ka of NH4+ = 5.6 x 10−10)

  28. chemistry

    Combustion of 1 mol of octane results in the formation of 8 mol of carbon dioxide (CO2) . The molar mass of octane is 114.22 g/mol, and the molar mass of carbon dioxide is 44.01 g/mol. If an engine burns 550.0 g octane as it runs, what mass of carbon

  29. chemistry

    Combustion of 1 mol of octane results in the formation of 8 mol of carbon dioxide (CO2) . The molar mass of octane is 114.22 g/mol, and the molar mass of carbon dioxide is 44.01 g/mol. If an engine burns 550.0 g octane as it runs, what mass of carbon

  30. english

    for each of the five quotes identify the literal meaning , how this quote develops theme and the sources. these quotes are from hamlet by the way 1.A litte ere the mightiest Julius fell, The graves stood tenantless, and the sheeted dead Did squeak and

  31. math calculus

    The volume of the solid obtained by rotating the region bounded by y=x^2−2x and y=x about the line y=9, has the form a/bπ, where a and b are positive coprime integers. What is the value of a+b?

  32. Math - MAD

    What is the mad of the data? 6, 15, 7, 14, 11, 13, 15, 15 I think 1) Find the mean, 2) subtract each # in the list from that mean 3) find the mean of those #s and that's the Mad. I've done this and my answer is not an option on the multiple choice. PLEASE

  33. socials 11 (post war 1946-1980)

    what was the extent of Canada's involvement in the Marshall Plan?

  34. IT

    You have been tasked with the project of organizing a company offsite 2-day training session in which people are brought in from different parts of the country. This entails everything from preparation, accommodations, and facilities. • There is APA

  35. Math

    Whats the monthly principal and interest payment for a mortgage with a financed amount of $81,000 at 9% for 25 years?

  36. health supports

    blood flow is maintained in the veins by? A.blood pressure B.valves in the veins which prevent back-flow C.muscular pumping action of the vein walls D.partial vacuum in the heart my answer is b

  37. health supports

    normal motion of the sacroiliac joints is a ? A.hinge action B.gliding action C.rotation D.slight flexture my answer is d

  38. health supports

    the articulating surfaces of the knee joint are protected by? A.synovial fluid B.semilunar or meniscus cartilages C.the patella D.bursitis my answer is b

  39. Material Sciences

    HW9_1: AXIAL AND TRANSVERSE STRAINS - THE POISSON'S RATIO When no loads are applied, the isotropic elastic block depicted below is a cube of side L0=200 mm. When the distributed load (surface traction) q=200 MPa is applied as shown below, the side length

  40. Biology

    Is there any biology websites for teens??? (NOT games! notes and quizzes to practice). The Science of Biology The Chemistry of Life Cell Structure and Function Photosynthesis & Respiration Something REALLY easy to understand(btw I'm going to the 9TH

  41. chem

    no typeo dr bob... the question reads.. 0.788g/cc

  42. chem

    yes we did.. so the answer is the same? i don't know how to work it out. Thanks

  43. Physics

    A standing wave is generated in a 12.0 m wave tank using a frequency of 5.00 Hz. There are a total of four nodes in the standing wave (one on each end of the tank and two others between the ends). a) Sketch the wave in the tank. b) What is the velocity of

  44. general physics

    A tank contains mercury, whose density is 13 600 kg/m3. Find the force exerted by the mercury on a circular plug at the bottom of the tank. The plug has a diameter of 2.54 cm, and is located 37.6 cm below the surface of the mercury.

  45. Calculus

    In a study conducted by a certain country's Economic Development Board, it was found that the Lorentz curve for the distribution of income of college teachers was described by the function f(x) = 13/14x^2 + 1\14x and that of lawyers by the function g(x) =

  46. Calculus

    Find the amount of an annuity if $210/month is paid into it for a period of 20 yr, earning interest at the rate of 8%/year compounded continuously. (Round your answer to two decimal places.)

  47. Calculus

    Camille purchased a 10-yr franchise for a computer outlet store that is expected to generate income at the following rate measured in dollars/year. R(t) = 400,000 If the prevailing interest rate is 10%/year compounded continuously, find the present value

  48. Calculus

    The management of the Titan Tire Company has determined that the quantity demanded x of their Super Titan tires/week is related to the unit price p by the relation p = 144 − x^2 where p is measured in dollars and x is measured in units of a thousand.

  49. calculus

    A 3-dimensional structure is obtained from rotating the parabola y=x^2 about the y-axis. Each second, 2π units^3 of water is being poured into the structure from the top. When 8π units^3 of water has been poured in the structure, the instantaneous change

  50. calculus

    The area bounded by the curve 2y^2=x and the line 4y=x is rotated around the y-axis. The volume of the resulting structure can be expressed as V=a/bπ, where a and b are coprime positive integers. What is the value of a+b?

  51. English

    1. He missed the # 7 bus. 2. He missed Bus # 7. 3. he missed the Number 7 Bus. 4. He missed Number seven bus. 5. Hhe missed Bus Number 7. (Which ones are correct?)

  52. AP Calculus

    An open box is to be made from cutting squares of side 's' from each corner of a piece of cardboard that is 35" by 40". (a) Write an expression for the volume, 'V', of the box in terms of 's'. (b) Draw a graph of V(s). (c) State the domain and range of

  53. Math 6th grade

    What is smart estimation to determine an estimation range.

  54. health care marketing

    A large community hospital, River/> Valley/>/>, has recently begun to acquire physician practices. At issue is whether to rename each acquired practice to “ River Valley Associates” or to leave each name alone. What are the trade-offs River/>

  55. physics

    A airplane is approaching you at a speed of 360km/h. If you measure the pitch of its approaching engines to be 512 Hz, what must be the actual frequency of the sound of the engines? The speed of sound in air is 345m/s answer is 364Hz please explain steps?

  56. physics

    As a train moves away from you, the frequency of its whistle is determined to be 475Hz. If the actual frequency was 500 Hz and the speed of sound in air is 350m/s, what is the Train's speed? answer is 18.4m/s please show and explain steps

  57. ENG091

    Subjects & Verbs. I was wanting to check my work please before I turn it in. 1.Abraham Lincoln was carrying two pairs of glasses and a penknife on the night of his death. Ans:Abraham Lincoln and was carrying 2.On his way to work, George stopped for gas.

  58. physics

    an automobile is travelling towards you at a speed 25.0m/s. When you measure the frequency of its horn, you obtain a value of 26Hz. If the actual frequency of the horn is known to be 240Hz, calculate speed of sound in air? answer is 325m/s

  59. physics

    runner goes from a standstill to a speed of 7.9 m/s in 14s. what is the acceleration of the runner?

  60. math

    If # is a binay operation defied by a # b = a^2 + b, find the value of 4 # 1.

  61. math

    If the operation * is defined as a * b = 3a + b, find the value of 3 * 5.

  62. math

    If a * b is a binary operation defined as a + b / a , evaluate 2 * 4.

  63. algebra

    Can someone help me simplify this -216x^3 + 1

  64. Stats

    A pizza parlor has 13 different toppings available for its pizzas, and 2 of these toppings are pepperoni and anchovies. If a customer picks 2 toppings at random, find the probability that pepperoni is one of the toppings. Round to four decimal places.

  65. algebra

    Can someone help me factor this 24x2 + 42x + 15

  66. college chemistry

    I was wonder what bromine/glacial acetic acid solution is used for during the bromination of acetanilide reaction

  67. English

    I"m having difficulty correctly addressing the below sentences. The assignment is to fix, if needed, sentence fragments. At first and second glance, I feel these are correct: With machetes, the explorers cut their way through the tall grasses to the edge

  68. algebra

    I need to factor (my last post was incorrect) 24x^2 + 42x + 15

  69. English

    This is a story about Turtle and Rabbit. Fill in the blanks with the correct words and write the numbers in the correct order. (Do we have to use 'write the correct words' or 'write correct words' without 'the'?)

  70. chemistry

    A sample of N2 with a pressure of 790mmHg at -80∘C is heated to 35∘C.

  71. business

    book report is anyone interested in writing a book report on leading with the heart coach k's successful strategies in basketball, business, and life

  72. chem please help

    Find the number of moles of H2 in 1660mL H2 gas.

  73. math

    Jill went inside a store and spent half of her money and 20.00 she then went inside a second store and spent half of her remaining money and 20.00 more. she was left with no money afterwards. how much did she have when she went inside a store?

  74. physics

    A 1.80 m radius playground merry-go-round has a mass of 120 kg and is rotating with an angular velocity of 0.300 rev/s. What is its angular velocity after a 22.0 kg child gets onto it by grabbing its outer edge? The child is initially at rest.

  75. Chemistry

    I've calculated my % yield for 2 experiments, the second one using the final product of the first one. How would I calculate the "total % yield" like my T.A. wants? Would I just add both percentages up and divide by 200?

  76. Math word problem

    Sections of cylindrical tubing are to be made from thin rectangular sheets that have an area of S = 600 in2. Find the radius r and height h needed to construct a tube that has a volume of 600 in3. (Round your answers to two decimal places.) A) r= ? in B)

  77. Math word problem

    Sections of cylindrical tubing are to be made from thin rectangular sheets that have an area of S = 600 in2. Find the radius r and height h needed to construct a tube that has a volume of 600 in3. (Round your answers to two decimal places.) A) r= ? in B)

  78. math

    Padding 7 miles upstream, Steven and his brother averaged 2 miles per hour. On the way back, their rate of speed was 3 1/2 miles per hour. How long did it take them to make the round trip?

  79. physics

    (a) Calculate the angular momentum of an ice skater spinning at 6.00 rev/s given his moment of inertia is 0.490 kg·m2. (b) He reduces his rate of spin (his angular velocity) by extending his arms and increasing his moment of inertia. Find the value of his

  80. math.

    Mr. B walks for 4 hours at the rate of y miles an hour. He stops an hour for lunch and then returns to the starting point by a route that is twice as long, but he travels in an auto whose speed is five times that of his walking rate. Find the number of

  81. math

    Four candidates are running for president of the student council. Three other candidates are running for vice-president. How many different ways can the two offices be filled?

  82. English

    I won the school marathon! 1. Congratulations! 2. Good for you! 3. Well done! 4. Very good! (Are all the responses suitable? Do you have some more suitable responses? Would you write them? Thank you.)

  83. life orientation

    provide recommendations on how to address ill health

  84. mathsssssssssssssssssssssssssssssssssssss

    Brilli the ant is considering the complexities of a 5-dimensional universe. She wants to count the number of integer points that are distance n√ away from the origin. Let Tn be the set of ordered 5-tuples of integers (a1,a2,a3,a4,a5) such that

  85. Math (Algebra)

    If the function y=(x^2−2x)^2+6x^2−12x has the minimum value b at x=a, what is a−b?

  86. Math (Algebra)

    Consider the graph of the quadratic function y=ax^2+bx+c. If it passes through two points P=(6,0) and Q=(14,0), and its vertex is on the line y=−16x, what is the value of a+b+c?

  87. Math (Algebra)

    What is the maximum value of f(f(x)) in the domain 4≤x≤7 for the function f(x)=x^2−10x+22?

  88. physhcs

    An A.c circuit consist of 3uf capacitor and 500ohm resistor in series. If the current voltage applied is 12v and frequency 50Hz. Calculate 1. Current through the circuit 2. Voltage accross the capacitor 3 phase angle 4. Average power supplied 5. Power

  89. physics

    Telephoto lenses allow one to "zoom in" on distant objects, making them bigger. A particular telephoto lens consists of a combination of two thin lenses having focal lengths of f1=20 cm and f2=−8 cm, respectively. The lenses are separated by a distance

  90. math

    Brilli the ant is considering the complexities of a 5-dimensional universe. She wants to count the number of integer points that are distance sqrt(n) away from the origin. Let Tn be the set of ordered 5-tuples of integers (a1,a2,a3,a4,a5) such that

  91. chemistry

    Atoms of the group 15 elements tend to react to form _______ ions. A. 5+ B. 32 C. 52 D. 3+ My guess is D. Which is correct?

  92. Calculus

    The equation 10(x-1)(x-2)(x-3) = 1 has three real solutions a

  93. science

    How much hot air in SCFM is needed to heat up water from 60F to boiling point. The hot air is 350F.

  94. Calculus

    Find the positive value of x which satisfies x = 4.3cos(x). Give the answer to six places of accuracy. Remember to calculate the trig functions in radian mode

  95. Calculus

    A fence 5 feet tall runs parallel to a tall building at a distance of 2 feet from the building. We want to find the the length of the shortest ladder that will reach from the ground over the fence to the wall of the building. Here are some hints for

  96. Calculus

    How would you go about finding the derivative of y=1/(3x^2)-5/(2x)?

  97. math

    Ten minutes after a plane leaves the airport, it is reported that the plane is 80 miles away. What is the average speed of the plane, in miles per hour?

  98. geometry

    Given that AB is a tangent of the circle with the center at X, AB = 12, and XD = 2.5, which is the length of DB?

  99. math (please help steve)

    Brilli the ant randomly placed a token into a square on a 2×100 chessboard according to a probability distribution P. The token is then moved uniformly at random to one of the horizontally, vertically, or diagonally adjacent squares. The probability that

  100. physics/science

    An A.c circuit consist of 3uf capacitor and 500ohm resistor in series. If the current voltage applied is 12v and and frequency 50Hz. Calculate 1. Current though the circuit 2. Voltage accross the capacitor 3 phase angle 4 average power supplied 5 power

  101. physics

    Telephoto lenses allow one to "zoom in" on distant objects, making them bigger. A particular telephoto lens consists of a combination of two thin lenses having focal lengths of f1=20 cm and f2=−8 cm, respectively. The lenses are separated by a distance

  102. Math

    At&t bought a new computer system. The company borrowed. $46,100 at 6 1/3% for 155 days. Find the interest owed?

  103. microbiology

    what is the definition of chemorganic

  104. Math

    What's the accummulated full amount for a principal of $15,000 for 3 years at 4% compounded semi annually?

  105. Finance

    Assume that you are the assistant to the CFO of XYZ Company. Your task is to estimate XYZ's WACC using the following data: The firm's tax rate is 40%. The current price of the 12% coupon, semiannual payment, non-callable bonds with 15 years to maturity is

  106. socials 11 (the beginning of the cold war)

    in what sense did the concept of MAD keep both sides from going to war?

  107. Math

    What should I invest now to have $15,000 in 12 years at a compounded monthly rate of 1.6%?

  108. Math

    If I went to the bank and fianaced $81,000 at 9% for 25 years what would my monthly principal and interest payment be?

  109. English

    I have to make a thesis statement about a book and a movie. I need help creating the thesis. I am doing the hobbit. This is a comparative essay with the topic of human development. Thanks..Please help me out..

  110. physics

    no answer