Questions Asked on
July 8, 2011

  1. chemistry 101

    Consider the following reaction. CaO (s) + CO2 (g) = CaCO3 (s) A chemist allows 14.4 g of CaO and 13.8 g of CO2 to react. When the reaction is finished, the chemist collects 19.4 g of CaCO3. Determine the limiting reactant, theoretical yield, and percent

    asked by ABCD
  2. chemistry 101

    How many grams of oxygen are in 40.1 g of calcium hydroxide? options: 17.3 g 8.64 g 20.1 g 0.541 g 11.2 g

    asked by ABCD
  3. physics

    A car traveling 95 km/h slows down at a constant 0.80 m/s^2 just by "letting up on the gas. A) Calculate the distance it travels during the second second. B) Calculate the distance it travels during ninth second.

    asked by mike
  4. Physics

    Two point charges are separated by 6cm. The attractive force between them is 22 N. Find the force between them when they are separated by 12 cm.

    asked by Sarabeth
  5. Chemistry

    A quantity of gas weighing 7.10g at 741 torr and 44 degrees C occupies a volume of 5.40 L. What is its molar mass?

    asked by Sade
  6. chemistry 101

    How many moles of oxygen are in 3.45 mol of diphosphorus pentoxide? options: 5.75 mol O 13.5 mol O 6.90 mol O 3.45 mol O 17.3 mol O

    asked by ABCD
  7. Physics

    A ball (mass m = 250 g) on the end of an ideal string is moving in circular motion as a conical pendulum as in the gure. The length L of the string is 1.67 m and the angle with the vertical is 37 degrees A) What is the magnitude of the angular momentum (kg

    asked by jhay
  8. Sentance patterns

    I have to match the following sentances to the sentance patterns listed 1.Visiting old mine shafts can be an interesting experience. 2.Remodeling this house has become very expensive. 3.The old village sprawled across the green valley. 4.Academic success

    asked by Eddie
  9. social studies - history

    what was unusual about the landholding policy in the vancouver colony? and why would immigrants from Canada object to such a policy?

    asked by Cloey
  10. Trigonometry

    log3(x^2)=2log3(4)-4log3(5)

    asked by Kali
  11. Statistics

    M&M plain candies come in various colors. According to the M&M/Mars Department of Consumer Affairs, the distribution of colors for plain M&M candies is as follows. Color Purple Yellow Red Orange Green Blue Brown Percentage 18% 19% 21% 9% 9% 6% 18% Suppose

    asked by Anonymous
  12. physical science

    The speed of light is 3 „e 108 m/s (300,000,000 m/s). Red light has a wavelength of 7 „e 10-7 m (0.0000007 m). What is its frequency?

    asked by wendell
  13. physics

    A tuning fork produces a wave at 280 Hz and with a wavelength of 1.5 m. Calculate its velocity.

    asked by wendell
  14. Statistics

    On a very short quiz, there is one multiple choice question with 5 possible choices (a, b, c, d, e) and one true or false question. Assume you are taking the quiz but do not have any idea what the correct answer is to either question. You mark an answer to

    asked by Cassie
  15. Analytical chemistry

    What is the reaction & calculation when KIO3 mixed with KI, HCl by titration with Na2S2O3?

    asked by Selim
  16. accounting

    Jan. 1 Purchased a small company and recorded goodwill of $150,000. Its useful life is indefinite. May 1 Purchased for $90,000 a patent with an estimated useful life of 5 years and a legal life of 20 years

    asked by stacey
  17. physics

    An entertainer juggles balls while doing other activities. In one act, she throws a ball vertically upward, and while it is in the air, she runs to and from a table 5.20m away at a constant speed of 2.40m/s, returning just in time to catch the falling

    asked by izzy
  18. Math Calculus

    Let C(x) = 0.02x^3 + 55x^2 + 1380. Find the minimum average cost for this commodity. I got to the point where I got x=-1374.98, x=-5.018, x=5 but what do I have to do again after this? Because I am missing some steps after I find x. Do i have to plug all

    asked by Megan
  19. chemistry 101

    Lakes that have been acidified by acid rain can be neutralized by the addition of limestone (CaCO3). How much limestone in kilograms would be required to completely neutralize a 5.2 x 109 L lake containing 5.0 x 10-3 g of H2SO4 per liter?

    asked by ABCD
  20. chemistry 101

    How many molecules of oxygen are produced from the decomposition of 8.75 g of hydrogen peroxide in the following equation Mg + H2O2 --> MgH2 + O2 options: 8.75 x 1024 6.02 x 1023 1.55 x 1022 5.27 x 1024 1.55 x 1023

    asked by ABCD
  21. chemistry 101

    Determine the empirical and molecular formula for a compound made from 54.09% calcium, 2.72% hydrogen, and 43.18% oxygen with a total molar mass of 222.3 g.

    asked by ABCD
  22. chemistry 101

    Calculate the empirical formula for the following compound: potassium tartrate found in baking powder: 20.8% K, 2.7% H, 25.5% C, and 51.0% O

    asked by ABCD
  23. Computer Science - MATLAB

    One interesting property of a Fibonacci sequence is that the ratio of the values of adjacent members of the sequence approach a number called “the golden ratio” or PHI. Create a program that accepts the first two numbers of a Fibonacci sequence as a

    asked by George
  24. the colony of Vancouver Island to 1858

    why did the British Government grant a trade monopoly to the HBC on Vancouver Island ? i really cannot find the answer :/

    asked by Jasmin
  25. chemistry 101

    Given the following dissolving process: Fe2(SO4)3 (s) = 2Fe3+ (aq) + 3SO42- (aq) How many grams of iron (III) ions are produced when 0.450 moles of sulfate ion are produced? options: 50.3 g 16.8 g 50.3 g 37.7 g 75.4 g

    asked by ABCD
  26. Shawn

    How many milliliters of 0.355 M NaF solution are needed to react completely with 24.6 mL of 0.216 M CaCl2 solution? How many grams of CaF2 will be formed? The reaction is CaCl2(aq) + 2NaF(aq) → CaF2(s) + 2NaCl(aq)

    asked by Chemistry
  27. Math

    A firecracker is launched straight up, and its height is a function of time, h(t)= -14^2 + 112t, where h is the height in feet and t is the time in seconds with t=0 corresponding to the instant it launches. What is the height 5 seconds after launch? What

    asked by Tim
  28. algebra II

    The profit made when t units are sold, t>0, is given P=t²-36t+320. Determine the number of units to be sold in order for P>0 (a profit is made).

    asked by HELP
  29. System of Linear Equations

    A manufacturer produces three types of radios: deluxe, standard and economy. Each radio uses three different types of transistors: P, Q and R. The deluxe radio uses 2 P's, 7 Q's and 1 R. The standard contains 2 P's, 3 Q's and 1 R, and the economy model

    asked by neeha
  30. linear programming

    A manufacturer has a maximum of 240, 360, and 180 kilograms of wood, plastic and steel available. The company produces two products, A and B. Each unit of A requires 1, 3 and 2 kilograms of wood, plastic and steel respectively; each unit of B requires 3, 4

    asked by nmh
  31. value of money

    You want to have $1,000,000 in your bank account when you turn 65 years old. Today is your 20th birthday. As a birthday present you received $27,000 and you want to invest this amount. At what annual interest rate must you achieve to realize this goal?

    asked by nmh
  32. calculus

    A rectangular aquarium is to be built with an open top (no material needed) and a square base. You have 60 square feet of material to build it with. (We are assuming that the sides and bottom are perfectly flat). What is the maximum volume that this

    asked by Megan
  33. linear programming

    Maximize z = 16x + 8y subject to: 2x + y ≤ 30 x + 2y ≤ 24 x ≥ 0 y ≥ 0 Graph the feasibility region. Identify all applicable corner points of the feasibility region. Find the point(s) (x,y) that maximizes the objective function z = 16x + 8y.

    asked by nmh
  34. linear programming

    A company is planning to purchase and store two items, gadgets and widgets. Each gadget costs $2.00 and occupies 2 square meters of floor space; each widget costs $3.00 and occupies 1 square meter of floor space. $1,200 is available for purchasing these

    asked by nmh
  35. physics

    A space shuttle is launched from rest. It takes 8.00 to reach 155 km/s, and at the end of the first 1.00 km/s its speed is 1550 . What is the average acceleration (in m/s) of the shuttle during the first 8.00 s?

    asked by izzy
  36. System of Linear Equations

    A manufacturer produces three types of radios: deluxe, standard and economy. Each radio uses three different types of transistors: P, Q and R. The deluxe radio uses 2 P's, 7 Q's and 1 R. The standard contains 2 P's, 3 Q's and 1 R, and the economy model

    asked by neeha
  37. physics

    a force of 4 N acts on a body of mass 2 kg for 4 sec . assuming the body to be initialy at rest . find the distance covered in 10sec after force start acting

    asked by Anonymous
  38. college math

    Using correct mathematical notation and symbols, express the following in set-builder notation: Z = {16, 17, 18, 19, 20}

    asked by jenna
  39. physics

    A helicopter is ascending vertically with a speed of 5.20 m/s. At a height of 120 m above the Earth, a package is dropped from a window. How much time does it take for the package to reach the ground? [Hint: v_0 for the package equals the speed of the

    asked by vicky
  40. Economics

    Equilibrium is defined as the price at which the quantity demanded and the quantity supplied are equal. In the short run, equilibrium does not always occur. What terms describe disequilibrium? How is subsequent equilibrium re-established

    asked by alphonso
  41. math

    A manufacturer makes two products A and B, each of which is processed in two departments, production and finishing. Each A takes 3 hours to produce and six hours to finish, whereas each B takes 5 hours to produce and 2 hours to finish. How many units of A

    asked by tina
  42. Math

    Expand the following binomials to look for patterns when expanding binomials. Try to find a pattern that will allow you to expand binomials without carrying out all of the steps. (x + 2)3 (2x+1)4 (2x-1)4 (2x-2)3

    asked by Joey
  43. linear equations

    A manufacturer makes two products A and B, each of which is processed in two departments, production and finishing. Each A takes 3 hours to produce and six hours to finish, whereas each B takes 5 hours to produce and 2 hours to finish. How many units of A

    asked by nmh
  44. linear programming

    A feed company is developing a feed supplement from two grains A and B. Each kilogram of A contains 0.3 grams of protein and 0.2 grams of carbohydrates; each kilogram of B contains 0.9 grams of protein and 0.1 grams of carbohydrates. There must be at least

    asked by nmh
  45. value of money

    Find the compound amount if $6,400 is invested for 2 years at 12% compounded monthly. What difference would compounding daily make in this example?

    asked by nmh
  46. Computer Science - MATLAB

    I guess it was skipped One interesting property of a Fibonacci sequence is that the ratio of the values of adjacent members of the sequence approach a number called “the golden ratio” or PHI. Create a program that accepts the first two numbers of a

    asked by George
  47. calculus

    Solve the equation 2x^3 + 3x^2 - 6x - 4 = 0, giving the result to four decimal places

    asked by amit
  48. System of Linear Equations

    A manufacturer makes two products A and B, each of which is processed in two departments, production and finishing. Each A takes 3 hours to produce and six hours to finish, whereas each B takes 5 hours to produce and 2 hours to finish. How many units of A

    asked by neeha
  49. PLEASE ANSWER math

    What is the numeric value of $10.25?

    asked by suvy
  50. Math-trig.

    1)sinx+cosx=1 2)sinx+cosx=1+sin2x

    asked by lisa
  51. math-trigon.

    [1-sin^2(alfa+beta)]/cos^2(alfa+beta)

    asked by lisa
  52. maths

    if two interior angles on the same side of a transversal intersecting two parallel lines are in the ratio 2:3,then the smaller of two angles is

    asked by sakina
  53. Micoreconomics

    In recent years, the Internet auction firm eBay has sougth to make its auction technology the favorite of software programmers, and it has begun licensing its technology to other Web sites. The company's managers have pulicly stated that their goal is for

    asked by Tina
  54. MATH

    Halley's comet appears in the sky approximately once every 77 years. If the comet was seen in by Astronomer Edmund Halley in 1531. How many times has the comet been spotted since?

    asked by Kate
  55. Geometry

    A car dealership interviewed every driver who came onto their lot on Tuesday. This produced the following results: there were 34 people who owned trucks and 59 people who owned cars. If 19 people owned both a truck and a car and 7 people owned neither, how

    asked by Anonymous
  56. Math

    Ice Dreams finds its profit from the sale of ice cream increases by $30 per week during the 9 weeks of student summer holidays. Find the profit for the summer season if the profit for the first week of the summer is $100.

    asked by Bob
  57. linear programming

    Minimize z = 3x + 6y subject to: 4x + y ≥ 20 x + y ≤ 20 x + y ≥ 10 x ≥ 0 y ≥ 0 Graph the feasibility region. Identify all applicable corner points of the feasibility region. Find the point(s) (x,y) that minimizes the objective function z = 3x +

    asked by nmh
  58. chemistry 101

    What is the coefficient for aluminum after the following equation is balanced: Al(s) + O2(g) --> Al2O3(s) options: 2 4 1 3 0

    asked by ABCD
  59. chemistry

    How many grams of HCl are needed to change 1000 L of water with a pH of 11 to a pH of 5.5?

    asked by Kate
  60. Physics

    consider a cart being pulled up an inclined plane by a student during a Physics lab. The applied force on the cart is 18 N is directed parallel to the incline to cause the cart to be displaced parallel to the incline for a given displacement of 0.7 m. The

    asked by Allison
  61. Trigonometry

    v=2(ab+bc+ca), solve for a

    asked by Kali
  62. Probability

    according to a poll 14% Americans have tattoos. Find the odds that an American has a tattoo?

    asked by Anonymous
  63. algebra 2

    If Q varies inversely as the square root of R and Q=2 when R=4, what is Q when R is 25? does Q=625 im not sure can someone double check it for me.

    asked by tom
  64. value of money

    Deposits of $1,000, $1,100 and $680 were made into a savings account, the first two years ago, the second 18 months ago, the third 6 months ago. How much is in the account now if the interest on all deposits is 12% compounded semi-annually?

    asked by nmh
  65. value of money

    A deposit of $2,000 earns interest at a rate of 14% compounded quarterly. After two and a half years the interest rate changes to 13.5% compounded monthly. How much is in the account after six years?

    asked by nmh
  66. value of money

    Which is a better rate of interest, 16% compounded quarterly or 16 1/4% compounded semi-annually?

    asked by nmh
  67. value of money

    At what annual nominal rate of interest will $6,900 earn $6,400 interest in five years?

    asked by nmh
  68. Resources For Educating Young Children, Part 1

    I have a few more questions to ask they are 1. Mike becomes angry when he can’t solve a mathematical problem, and slams his book down on the desk. Since his behaviour is disruptive to his classmates, you wish to devise a scale by which you can gauge the

    asked by beth
  69. math

    how the distance between centre of circle if: x^2+y^2+2x-2y-11=0 and x^2+y^2-4x+6y-17=0

    asked by elsa
  70. physical science

    the moderate temperatures of islands throughout the world has much to do with waters: A. hgih evaporation rate. B. vast supply of thermal enerygy. C. poor conductivity D.high specific heat capacity.

    asked by haley
  71. math

    which is the odd one out? 16 36 64 27 81

    asked by mia
  72. math

    The slope of a line that is perpendicular to a line whose slope is -2/7 is

    asked by leah
  73. math

    Indicate the equation of the line that is the perpendicular bisector of the segment with endpoints (4, 1) and (2, -5).

    asked by leah
  74. geometry

    Indicate the equation of the line through (2, -4) and having slope of 3/5.

    asked by katie 6
  75. algebra 2

    what is the range of the function F(x)= -(x+2)^2+3 A. y

    asked by dalena
  76. Math

    According to a 2008 poll 14% Americans have tattoos. Find the odds that an American has a tattoo? (I got probability of 14/100) 1 - 14/100 then 86/100 X 11/14 ***odds American has a tattoo 7:43*** did I work this problem correctly

    asked by Shay
  77. economics

    company A plans to purchase a packaging machine worth 5 million to further fast and up the packaging of their product brand X. the purchase is intended to boost up the loosing sale of the said product which makes 10000 per year. the target of the company

    asked by melissa
  78. math

    give an example that demonstrates how much money you are will to spend if I want to spend no less than 6000 and no more than 10000,

    asked by Bernadine
  79. ATTN: Reiny

    How do you write in correct set notation?

    asked by Jen
  80. System of Linear Equations

    A medical supply company has 1150 worker-hours for production, maintenance, and inspection. Using this and other factors, the number of hours used for each operation, P, M, and I, respectively, is found by solving the following system of equations. Find P,

    asked by neeha
  81. MATH

    1) During the two months of the summer holiday, you find a summer job that pays $160 per week with a $10 a week raise. How much money will be made by the end of the summer? 2 Your grandmother offers you $1 on the first day of March break and offers to

    asked by BEN
  82. Physics

    consider a cart being pulled up an inclined plane by a student during a Physics lab. The applied force on the cart is 18 N is directed parallel to the incline to cause the cart to be displaced parallel to the incline for a given displacement of 0.7 m. The

    asked by Allison
  83. Math Calculus

    A sphere is initially measured as having a radius of 4 inches. A subsequent measurement shows that the radius is really 3.99. Find (a) the actual difference in volume between the initial measurement and the correction, and (b) the difference as estimated

    asked by Megan
  84. Composition and Communication

    Identify three key strategies to ensure you will choose words correctly in the future to improve your writing.

    asked by Kiki
  85. Math

    32% of Americans age 25-29 have a tattoo. Find the odss that a 25-29 year old american does not have a tattoo? I used the formula p(no tattoo)/p(tattoo) and got the answer 13.7

    asked by Anonymous
  86. Math-Can u help me Reiny? So confused :(

    A car dealership interviewed every driver who came onto their lot on Tuesday. This produced the following results: there were 34 people who owned trucks and 59 people who owned cars. If 19 people owned both a truck and a car and 7 people owned neither, how

    asked by Jen
  87. algebra

    The cost, in millions of dollars, to remove x % of pollution in a lake modeled by c=6,000/200-2x What is the cost to remove 75% of the pollutant? I am so lost, there are other percents if someone can show me this one I can figure out the other questions.

    asked by daytripper
  88. maths

    If E the universal set contains all rectangles of length x and breadth y, where x and y are integers and x>y. A contains rectangles with area of 24m2 B contains rectangles , each with length multiples of 3 and area of 24m2. Find n(A), n(B), and n(A ^B)

    asked by Fatima
  89. algrebra 2

    can someone please help me im stumped on these two. use analytical methods to solve the equation. 1+(1/x)=(42/x²) (7/x-4)=1+(9/x+4)

    asked by tom
  90. algebra

    a ramp rises 2.3 ft vertically and 14.8 ft horizontally express the slope

    asked by melissa
  91. composition and communication II

    I don't know how to answer this question. What strategies will I use to overcome challenges of writing a paper?

    asked by Jamie
  92. anthropology

    how same sex marriage define neo evolution theory.

    asked by ami
  93. Math

    2x^3-3x^2-8x-2

    asked by Sivesh
  94. Math

    What is the numeric value of 10.25?

    asked by suvy
  95. maths

    how do u write 7th july 2011 in 5 letters without using numbers?

    asked by sushil
  96. algebra

    Can someone please help me? Thanks! simplify the following expression, and rewrite it in an equivalent form with positive exponents(4x^2)-^2

    asked by Jellie
  97. algebra

    how do you subtract 7.9 from 21

    asked by deedee
  98. Algebra 2

    v=2(ab+bc+cd) for a

    asked by Kali
  99. new arthistory submission 26

    Compare and contrast Bauhaus and the International Style..

    asked by SOLANAH
  100. matematica

    como formar tres numeros diferentes com mais de 22 dezenas e menos de 24 dezenas

    asked by A
  101. Math Calculus

    The foot of a 30-foot ladder is being pulled away from a vertical wall at a rate of 1 foot per minute. When the top of the ladder is 6 feet from the ground, at what rate is the top of the ladder moving down the wall?

    asked by Meg
  102. College math 115

    I need help with my assignment how much will it be to have someone help me with it it is due by tomorrow?

    asked by Jennifer
  103. chemistry

    How many grams of acetic acid (MW = 60 g/mol, pKa=4.75) are needed to change 1000 L of water with a pH of 11 to a pH of 5.5?

    asked by Kate
  104. Math

    Given A = {1, 2, 3}, B = {3, 4, 5, 6,}, and C = {3, 5, 7}. Evaluate each set a) A ∩ B b) A U C c) B U C d) (A U B) ∩ C e) A U (B U C) f) (A ∩ B) ∩ C g) (A ∩ B) U C

    asked by Jenna
  105. math

    Given the following sets, select the statement below that is NOT true. A = {b, l, a, z, e, r}, B = {b, a, l, e}, C = {a, b, l, e}, D = {l, a, b}, E = {a, b, l} a.) E ⊆ A b.) C ⊆ B c.) D ⊆ C d.) D ⊂ B e.) C ⊂ B

    asked by jesse
  106. Algebra 1

    Can someone help me do this problem? (The square root of x squared minus 11) + 1 = x.

    asked by Andrew
  107. linear programming

    A manufacturer produces two items, bookcases and library tables. Each item requires processing in each of two departments. Department I has 40 hours available and department II has 36 hours available each week for production. To manufacture a bookcase

    asked by nmh
  108. value of money

    Billy Burnett's grandfather willed Billy $10,000 payable on his twenty-first birthday. What will be the value of the bequest when Billy reaches 17 years of age if money is worth 8% compounded semi-annually?

    asked by nmh
  109. value of money

    Suppose you had three different offers for your used car. One person will give you $1,000 right now, another offers $1,200 six months from now and the other offers $1,600 two years from now. If interest is 16% compounded quarterly, which offer is worth the

    asked by nmh
  110. value of money

    At 16% compounded quarterly, how long would it take for money to triple?

    asked by nmh
  111. calculus

    Let f(x)= 4x(x+3)^2 - (x+3)^3 and find the values of x that correspond to f(x)=0.

    asked by Gary
  112. soc 207

    Discuss the concept of environmental justice; support your discussion with at least one example.

    asked by tamika
  113. english

    the subject and verb should agree even when other words come between them. For example: “The students, as well as their teacher, are excited about the upcoming trip to Italy.”

    asked by kellie pricley
  114. communication and Composition II

    I have to identify three challenges that might arise when writing a paper. I have read the chapters and can't find the answers can you help me?

    asked by Jamie