Questions Asked on
February 23, 2013

  1. chemistry

    Consider the following reaction: Na2CO3 + NiCl2 ¨ NiCO3 + 2NaCl Using the solubility rules determine the solubility of all reactants and products. Explain your answer Please. Which product is the precipitate in this reaction? Write the complete ionic

    asked by Eagertolearn
  2. Math

    A forest ranger in a 140-foot observation tower sees a fire moving in a direct path toward the windmill by the lake. The angle of depression to the fire is 3°, and the angle of depression to the windmill is 8°. To the nearest foot, how close is the fire

    asked by Snake
  3. Chemistry

    Consider this equilibrium process at 686°C. CO2(g) + H2(g) CO(g) + H2O(g) The equilibrium concentrations of the reacting species are [CO] = 0.050 M, [H2] = 0.045 M, [CO2] = 0.086 M, and [H2O] = 0.040 M. (a) Calculate Kc for the reaction at 686°C. (b) If

    asked by Jackie
  4. Chemistry

    This question has been bugging me for a long time. A rock contains a Pb-206 to U-238 mass ratio of .145 to 1.00. Assuming that it did not contain any Pb-206 at the beginning of its formation, determine its age. I assume from the other problems in my book

    asked by Nancy
  5. Physics

    A spring stretches 0.150 m when a 0.30 kg mass is hung from it. The spring is then stretched an additional 0.100 m from this equilibrium point and released. Determine a). the spring constant, k, b). the maximum velocity of the mass, c. ) the maximum

    asked by Lori
  6. chemistry

    2.8% hydrogen, 9.8% nitrogen,20.5% nickel, 44.5% oxygen, and 22.4% sulfur determine empirical formula for compounds

    asked by tula
  7. Chemistry

    What is(are) the precipitate(s) that form when K2SO4, BaCl2, and AgNO3 solutions are mixed?

    asked by Jacob
  8. Physics

    A standard biological microscope is required to have amagnification of 200. 1)When paired with a 10 eyepiece, what power objective isneeded to get this magnification? Assume that the length of thetube of a standard biological microscope is 15 . 2) What is

    asked by Cassie
  9. chemistry

    I have a problem like this: CHCl3 + Cl2 = CCl4 +HCL This is the rate table: CHCL3 Cl2 Initial Rate .010 .010 .0035 .020 .010 .0069 .020 .020 .0098 .040 .040 .027 They want me to find the rate constant and the rate law.

    asked by Nancy
  10. math

    find the area of the shaded region in the figure assuming the quadrilateral inside the circle is a square. x^2+y^2=36 (the picture is of a square inside a circle on a coordinate plane)

    asked by matt
  11. Science

    A race car, moves at a constant speed around an oval track. Is the car accelerating? Why or why not?

    asked by Mia
  12. Geometry

    Mike and Lani stand 21.2 meters apart. From Mike’s position, the angle of elevation to the top of the Eiffel Tower is 40°. From Lani’s position, the angle of elevation to the top of the Eiffel Tower is 38.5°. How many meters high is the Eiffel Tower?

    asked by Charlie
  13. College Physics PLEASE HELP

    A spring stretches 0.150 m when a 0.30 kg mass is hung from it. The spring is then stretched an additional 0.100 m from this equilibrium point and released. Determine a). the spring constant, k, b). the maximum velocity of the mass, c. ) the maximum

    asked by Lori
  14. The Bet by Anoton Chekhov

    The "end" of the story begins after the jurist leaves his confinement in "The Bet" by Anton Chekhov...true or false?

    asked by rabbit445
  15. Math Help Please!!!!

    The breaking strengths (say, y) for one foot square samples of a particular synthetic fabric are approximately normally distributed with a mean of 2280 pounds per square inch and a standard deviation of 10.6 psi. a) find the probability of selecting a 1

    asked by Taylor
  16. Chemistry

    Consider the heterogeneous equilibrium process shown below. C(s) + CO2(g) 2 CO(g) At 700.°C, the total pressure of the system is found to be 3.87 atm. If the equilibrium constant KP is 1.52, calculate the equilibrium partial pressures of CO2 and CO.

    asked by Alan
  17. chemistry

    Calculate the change in entropy (ΔS˚) of reaction (J/K) for the equation as written. BaCO3(s) → BaO(s) + CO2(g) Table: S° (J/(K mol)) BaCO3(s) = 112 BaO(s) = 70.3 CO2(g) = 213.7 So the answer is -41.7 I thought to find the entropy of reaction you

    asked by Carter
  18. grade 11 math

    Determine two angles between 0°and 360°that have a secant of -4. Round your answers to the nearest degree. There are tw answer 104°( I got this one but there is also 256° I don't have anyidea for this one please explain to me I appreciate your time

    asked by Priya
  19. Economics

    A $90,000 investment is made. Over a 5 year period, a return of $30,000 occurs at the end of the first year. Each successive year yields a return that is $3,000 less than the previous year's return. If money is worth 5 percent, use a gradient series factor

    asked by katie
  20. chem

    Body temperature is about 308K. On a cold day, what volume of air at 273K must a person with a lung capacity of 2.00 L breathe in to fill the lungs?

    asked by jillian
  21. Math Analysis

    what are the two critical points for r=4cos( 4(theta)) and its symmetries. As well as for r=2+2sin(theta)?

    asked by cindy
  22. physics homework

    You throw a 20 N rock into the air from ground level and observe that when it is 1 5.0 M high, it is traveling upward at 25.0 m/s. Use the work energy principle to find (a) the rock’s speed just as it left the ground and (b) the maximum height the rock

    asked by samantha
  23. Physics

    An animal-rescue plane flying due east at 33.0 m/s drops a bale of hay from an altitude of 58.0 m. If the bale of hay weighs 173 N, what is the momentum of the bale the moment it strikes the ground?

    asked by Anonymous
  24. Physics

    A femur is a bone in the leg whose minimum cross sectional area is about 4.0 x 10^-4 m^2. A compressional force in excess of 6.8 x 10^4 N will fracture this bone. A.) Find the maximum stress that this bone can withstand and B.) What is the strain that

    asked by Lori
  25. Physics (Velocity in two dimensions)

    Please explain, A clown in a circus is about to be shot out of a cannon with a muzzle velocity of 15.2 m/s, aimed at 52.7° above the horizontal. How far away should his fellow clowns position a net to ensure that he lands unscathed? The net is at the same

    asked by Kathy
  26. Math

    Suppose

    asked by Snake
  27. chemistry

    8.09% carbon, 0.34% hydrogen, 10.78% oxygen, and 80.78% bromine its similar to the last one i posted empirical formulas

    asked by tula
  28. Math Helpppp

    The College Board, which are administered each year to many thousands of high school students, are scored so as to yield a mean of 550 and a standard deviation of 100. these scores are close to being normally distributed. what percentage of the scores can

    asked by Katy
  29. chemistry

    sometimes,instead of percentage composition, you will have the composition of a mass sample. using the actual mass of the sample, determine the empirical formula for compounds that have the following analyses. b. a 13.07g sample of an unknown substance is

    asked by tula
  30. Chemistry

    calculate the pH and the propionate ion concentration [c3h502-] of a solution that is .06M in potassium propionate [kc3h502] and .085M in propionic acid [hc3h502]

    asked by Michael
  31. Science

    a sample of an unknown metal has a mass of 21.6g and a volume of 8.00cm^3 . calculate the density of the unknown metal

    asked by Stefan
  32. math

    a car weighing 15000N rounds a curve of 60m. radius banked at angle of 30 degrees.find the frictional force acting on the tires when the car is travelling at 100kph.The coefficient of friction between the tires and the road is 0.90.

    asked by randy
  33. chm

    Why are the atomic masses listed in the periodic table not whole numbers? Answer Scientists have yet to make the precise measurements. That would be too much of a coincidence. ??>>The atomic masses are average atomic masses. or >>Today's instruments are

    asked by jj
  34. physics homework

    two tugboats pulled a disabled supertanker. each tug exerts a constant force of 1.80 x 10 degree N, one 14 degree west of north and the other 14 degree east of north, as they pull the tanker 0.75 km toward the north. what is the total work they do on the

    asked by samantha
  35. statistics

    Accuracy of price scanners at Wal-Mart. The National Institute for Standards and Technology (NIST) mandates that for every 100 items scanned through the electronic checkout scanner at a retail store, no more than 2 should have an inaccurate price. A recent

    asked by Sandy
  36. Elementary Analysis

    A company wants to manufacture cylindrical aluminum cans with a value of 1000cm^3 (1 Liter) What radius and height of the can be to minimize the amount of aluminum used? Please help! This is very hard. Thanks.

    asked by JEZRELL
  37. american government

    which of the following ideas was not promoted by the social contract theory

    asked by keona
  38. Calculus and Vectors

    Show that proj(b⃗a⃗) =[(a⃗⋅b⃗)/(b⃗⋅b⃗)](b⃗)

    asked by Ginny
  39. Thermodynamics

    A cylinder contains one liter of air at room temperature (300 K) and atmospheric pressure (10^5 N/m^2). At one end of the cylinder is a massless piston, whose surface area is 0.01 m^2. Suppose that you push the piston in very suddenly, exerting a force of

    asked by Jane
  40. Chemistry

    Ammonia is composed of hydrogen and nitrogen in a ratio of 9.33 g of nitrogen to 2.00 g of hydrogen. If 2.19 g of nitrogen combined completely with hydrogen to form ammonia, what mass (g) of ammonia would be formed?

    asked by alex
  41. Science

    What did Oprah Winfrey do for 152 exceptional girls in South Africa? Select one: a. She gave each of them college scholarships. b. She helped them attend school in the United States. c. She invited them to attend her new school. d. She convinced them to

    asked by paragonnova
  42. Math

    The number of gallons of water remaining in a swimming pool t minutes after the drains are opened and the pool begins emptying is give given by the function f(x)=40t^2-3000t+40,000 gallons. Between 3 and 5 minutes after the drains were opened, the pool

    asked by Chase
  43. Geometry

    An isosceles trapezoid has bases of length 20 and 12 centimeters and legs of length 11 centimeters what is the area of the trapezoid to the nearest tenth

    asked by Julieta
  44. Physics

    A lens with a focal length of 25 cm is placed 45 cm in front of a lens with a focal length of 5.0 cm. a) How far from the second lens is the final image of an object infinitely far from the first lens? b) Is the image in part a in front of or behind the

    asked by Cassie
  45. research methods

    determining variables and identifying this type of quasi-exp design for this study is confusing: Study: lower socioeconomic status student benefit more over time from an academic tutoring program than higher socioeconomic students. Now: looks like this is

    asked by donna
  46. math

    find the present value using the present value formula. Achieve $ 225,500 at 8.65% compounded continusly for 8 years 155 days

    asked by Andrew
  47. AP Chem

    Need help with this practice problem. I got the values for the gas to liquid and liquid to solid. Don't know how to do the rest? Heat of Vap and fusion too? No idea! What is the enthalpy change during the process in which 100.0 g of water at 50.0 C is

    asked by Chemkid
  48. AP Chem

    Need help with this practice problem. I got the values for the gas to liquid and liquid to solid. Don't know how to do the rest? Heat of Vap and fusion too? No idea! What is the enthalpy change during the process in which 100.0 g of water at 50.0 C is

    asked by Chemkid
  49. biology

    27. Pretend you are a carbon atom that was part of a molecule of CO2 dissolved in the water at the beginning of the experiment. Describe a path you could take through both organisms in this experiment, including the molecules you would be a part of and the

    asked by roger
  50. maths

    ABCD is a parallelogram. AB=9cm,BC=5cm and DE is perpendicular to AB.If the area of parallelogram is 36sqcm,find AE?

    asked by Anonymous
  51. Trig identities:(

    Sin4A - cos4A = sin2A - cos2A Can i just square root the left side??:O

    asked by Kristien
  52. chm

    How would you classify the following material?swimming pool water homogeneous mixture

    asked by JJ
  53. physics

    The resistances of a platinum resistance thermometer at the ice point, the steam point and the boiling point of sulphur are 2.50,3.50,and 6.50 respectively. find the boling point of sulphur on the platinum scale. the ice point and the steam point measure 0

    asked by shashi ranjan
  54. Physics

    3 equal charges (all +Q) are located at A, B and C. ABC is an equilateral triangle with sides d. Point A is located at (0,0), point B at (d,0), point C at (d/2,d3√/2). Point P is inside the triangle such that AP=BP=CP. What is the electric field at P -

    asked by P
  55. Math

    Two paths diverge at a 48 degree angle. Two mountain bike riders take separate routes at 8km/hr and 12km/hr. How far apart are they after 2 hours? Include a diagram.

    asked by Anonymous
  56. Chemistry

    When 4.54 g of a nonelectrolyte solute is dissolved in 565 mL of water at 29 °C, the resulting solution exerts an osmotic pressure of 835 torr. What is the molar concentration of the solution? How many moles of solute are in the solution? What is the

    asked by Jim
  57. College Physics PLEASE HELP

    A cylindrically shaped piece of collagen is being stretched by a force that increases from 0 to 3.0 x 10^-2 N. The length and radius of the collagen are 2.5 and 0.091 cm. Young's Modulus is 3.1 x 10^6 N/m^2. a.) If the stretching obeys Hooke's Law, what is

    asked by Lori
  58. chem

    how many moole of helium gas is needed to pressurize an evacuated 25.0L tank to a pressure of 120 atm at 25.0 C ?

    asked by Stephanie
  59. Math

    Two paths diverge at a 48 degree angle. Two mountain bike riders take separate routes at 8km/hr and 12km/hr. How far apart are they after 2 hours? Include a diagram.

    asked by Anonymous
  60. chemistry

    what pressure would have to be applied to a 27.2 ml sample of gas at 25 Celcius and 1.00atm to compress its volume to 1.ooml without a change in temperature

    asked by Gerry
  61. calculus

    At noon, you and I start at the same place, and then you head east at a speed of 5 kilometers per hour, and I head north at a speed of 4 kilometers per hour. After two hours, how fast are we moving apart, in kilometers per hour?

    asked by lisa
  62. Physics

    3 equal charges (all +Q) are located at A, B and C. ABC is an equilateral triangle with sides d. Point A is located at (0,0), point B at (d,0), point C at (d/2,d3√/2). Point P is inside the triangle such that AP=BP=CP. What is the electric field at P -

    asked by P
  63. Precalc

    Convert the complex number c=3cis 0.25 into rectangular form.

    asked by Jane
  64. Chemistry

    Na2CO3 + NiCl2 ¨ NiCO3 + 2NaCl Using the solubility rules determine the solubility of all reactants and products. Explain your answer. I answered Na2 as soluble, Co3 as soluble, NiCl2 as soluble ---->NiCO3 as insoluble, and 2NaCl as soluble. My

    asked by Eagertolearn
  65. language arts

    what similar character traits do the three samurai share? on the story the oxcart

    asked by viviana
  66. Thermodynamics

    The initial state consists of a closed system containing one mole of super-heated liquid water at 115°C and 1 atmosphere pressure. The immediate surroundings are also at 115°C and 1 atmosphere pressure. The change in state is described as this one mole

    asked by Becca
  67. Physics

    The antenna broadcasts radio signals at the resonant frequency of the tank circuit. Suppose that a certain tank circuit in a shortwave radio transmitter has a fixed capacitance of 1.8 x 10-11 F and a variable inductance. If the antenna is intended to

    asked by Please HELP
  68. Physics

    A cylindrically shaped piece of collagen is being stretched by a force that increases from 0 to 3.0 x 10^-2 N. The length and radius of the collagen are 2.5 and 0.091 cm. Young's Modulus is 3.1 x 10^6 N/m^2. a.) If the stretching obeys Hooke's Law, what is

    asked by Lori
  69. science

    what are three opposites or non-examples of fossil records?

    asked by kate
  70. algebra

    FIND THE VALUE OF K, SO THAT THE EXPRESSION IS A PERFECT SQUARE TRINOMIAL. x^2+6x+k k=

    asked by student needs immediate help
  71. Chemistry

    At the start of the reaction there are 0.714 mole of H2, 0.984 mole of I2, and 0.886 mole of HI in a 2.70 L reaction chamber. Calculate the concentrations of the gases at equilibrium.

    asked by Amy
  72. science

    The atmospheres of Mars and Venus are mostly carbon dioxide. Earth’s atmosphere contains only a fraction of a percent of carbon dioxide. Why is Earth’s atmosphere so different from those of Mars and Venus?

    asked by ricardo
  73. college algebra

    now i understand both intersection and union but not with an infinity. how do i figure this out (-infinity,4)n(0,infinity)

    asked by Marie
  74. Chemistry

    Suppose u place a beaker containing a solution in a refrigerator , an hr later a white solid is found on thr bottom of thr beaker. What happened. Why? I think a precipitate formed, but can any1 explain briefly so i can understand better? Thanks

    asked by Mia
  75. Finite Math

    6. A computer company has two manufacturing plants, one in Rochester and one in Queens. Transporting a computer from Rochester to the retail outlet takes 15 hours and costs $15, while transporting a computer from Queens to the retail outlet takes 20 hours

    asked by Amy
  76. math

    Assume the car can be purchased for 0% down for 60 months (in lieu of rebate). A car with a sticker price of $42,500 with factory and dealer rebates of $5,100 (a) Find the monthly payment if financed for 60 months at 0% APR. (Round your answer to the

    asked by Katarzyna
  77. Earth Science

    Which organism evolved before the others in geologic time? mammals amphibians reptiles **fish Which type of organism evolved later than the others? **mammals amphibians reptiles fish

    asked by Bob
  78. math

    How much money would have to be deposited into a compound interest savings account earning 5% each year in order to accumulate $10,000 in 18 years?

    asked by Don
  79. math

    simplifying expressions

    asked by jean
  80. Math

    In a computer lab there are two di erent printers. From 1pm-2pm Printer1 receives on average 12 print jobs and Printer2 receives on average 5 print jobs. Assume the number of print jobs requested on Printer1 and on Printer2 are independent of each other.

    asked by Nathan
  81. Math

    The number of gallons of water remaining in a swimming pool t minutes after the drains are opened and the pool begins emptying is give given by the function f(x)=40t^2-3000t+40,000gallons. Exactly 2 minutes after the drains are opened, the pool was

    asked by Chase
  82. ENGLISH

    need help with nominative and objective CASE PRONOUNS. these are the ones confusing me... THE POSTAL WORKER DELIVERED A PACKAGE FOR HARRY AND SHE/HER. MY GRANDFATHER AND HER/SHE OPERATED A SMALL INN IN VERMONT. THE COACH PRAISED MANUEL AND HE/HIM. WE'VE

    asked by EMILY
  83. Math

    A bag contains two blue, three purple, four yellow, two red, three green and one orange marbles. What is the conditional probability that, without replacement, the second marble is purple given that the first marble was green?

    asked by Becky
  84. Calculus

    g(t) = 1/(t^5 + 1)^2 g'(t)

    asked by Naomi
  85. Geometry

    An isosceles trapezoid has bases of length 20 and 12 centimeters and legs of length 11 centimeters what is the area of the trapezoid to the nearest tenth

    asked by Julieta
  86. Calculus

    Find an equation of the tangent line to the curve at the given point y^2 = x^3 (2-x) (1,1)

    asked by Jeremy
  87. Math

    An electron accelerates from rest to the right, in a horizontally directed electric field. The electron then leaves the electric field at a speed of 4.0 × 106, entering a magnetic field of magnitude 0.20 T (Tesla) directed into the screen. Calculate the

    asked by Ginny
  88. College Algebra

    Hello, I have been trying to do my math homework for a few hours now and can not figure out how to find the indicated intersection or union in interval notation. Example: (-1,5)n[0,8) Please help me!!

    asked by Marie
  89. Stat Help Please

    Determine which sampling method was used in each scenario. on a particular day 5 flights are selected at random and all of the passengers on these 5 flights are screened. Airport security uses a random number generator to determine the next passenger to

    asked by Melissa
  90. medical terminology

    Using either or both chapters (6 and/or 7) create a SOAP note using five medical words discussed in this week’s reading.

    asked by Myrtho
  91. Precalc

    Write the complex number z = −6 in polar form

    asked by Jane
  92. Math

    CosA/1+sinA=1-sinA/cosA I have to prove the identity each side has to b the same how would i do that? I have a unit test on monday so im doing practice questions

    asked by Kristien
  93. United States Constition

    Details: Part I: Principles of the Constitution Create a chart or a matrix outlining the following primary principles of the Constitution: 1. Self-Government 2. Separation of Powers 3. Checks and Balances Write an analysis of 250-500 words on the

    asked by Sylvia
  94. maths

    find the radius of the circle if length of arc is 4p cm and angle made by the arc at the centre is 40 deg.find the area made by the arc.

    asked by urvashi
  95. Stat Help Please

    Determine which sampling method was used in each scenario. on a particular day 5 flights are selected at random and all of the passengers on these 5 flights are screened. Airport security uses a random number generator to determine the next passenger to

    asked by Melissa
  96. maths-urgently needed

    A person buys a refrigerator for rupees 12000. He pays rupees 6000 in cash and agrees to pay the balance in 12 annual instalments of rupees 500 each. If the rate of interest is 12% and he pays it with instalments on the unpaid amount, how much did the

    asked by Anonymous
  97. Engineering Econonmy

    You decide to open an IRS-approved retirement account at your local brokerage firm. Your best estimate is that it will earn 9 percent. At the end of each year for the next 25 years, you will deposit $4000 per year into the account (25 total deposits). 3

    asked by manny
  98. Math

    Solve the equation by first factoring the quadratic expression. 1. x2+4.5x=0 2. x2-9x=0 3. -x2+10x=0

    asked by Enrique
  99. Math

    Solve the equation by first factoring the quadratic expression. 1. x2+4.5x=0 2. x2-9x=0 3. -x2+10x=0

    asked by Enrique
  100. geometry

    ABCD is a square of side length 1. E , F , G and H are the midpoints of AB , BC , CD and DA , respectively. The lines FA , AG , GB , BH , HC , CE , ED and DF determine a convex 8-gon. By symmetry, this octagon has equal sides. If s is the side length of

    asked by Anonymous
  101. Physics

    A battery has an internal resistance of 0.017 Ù and an emf of 9.00 V. What is the maximum current that can be drawn from the battery without the terminal voltage dropping below 8.75 V?

    asked by Don
  102. science

    name three examples of a fossil record

    asked by Dingbat
  103. grade 11 math

    Determine two angles between 0°and 360°that have a secant of -4. Round your answers to the nearest degree. There are tw answer 104°( I got this one but there is also 256° I don't have anyidea for this one please explain to me I appreciate your time

    asked by Priya
  104. Science

    What units of measurement do you use to measure the earth to... 1. Moon 2. Galaxy 3. Sun 4. Communication satellite 5. Pluto 6. Proxima Centauri

    asked by Abbey
  105. Math

    abcd is a parallelogram with sides ab=12 cm,bc=10 cm and diagonal ac=16 cm .find the area of the parallelogram also find the distance between its shortest sides

    asked by Shubham
  106. chemistry

    One reaction that produces hydrogen gas can be represented by the unbalanced chemical equation Mg(s) + HCl(aq) −! MgCl2(aq) + H2(g) . What mass of HCl is consumed by the reac- tion of 2.96 mol of magnesium? Answer in units of g

    asked by Anonymous
  107. us history

    plz someone give me the answer ive read m book over and over i cant find the answer to why is new orleans important

    asked by andrew
  108. Math

    the pet shop owner told jean to fill her new tank 3/4 full with water. Jean filled it 9/12 full. what fraction of the tank does Jean still need to fill?

    asked by Lissette
  109. Chemistry

    A solution containing 0.100 mol of Na2CO3 and 0.100 mol of NiCl2 is allowed to react. What mass of precipitate forms in this reaction?

    asked by Eagertolearn
  110. chem

    Mg(s) + 2HCl(aq) −> MgCl2(aq) + H2(g) What mass of MgCl2 is produced? Answer in units of g second part What mass of H2 is produced? Answer in units of g

    asked by Anonymous
  111. MATH

    If the sales tax on an item is 7%, the sales tax on an item costing d dollars can be found by the expression .07d. Determine the sales tax on a compact disk that cost $15.99.

    asked by TASHA
  112. Maths

    L=2x-1 W=x+3 Area =294cm find length and with of rectangle

    asked by Kay
  113. Calculus

    F(x) = 2√(1 + tanx) f'(x) 2√ = x^(1/2)

    asked by Kelly
  114. Science

    Would the function of the lung be affected if the alveoli were surround by walls made of several layers of cells rather than a single layer of cells? How?

    asked by Tu Anh
  115. World History

    Consider the meaning of bloodletting and human sacrifice to the Mesoamericans How do these practices make sense in the context of their belief systems?

    asked by Gregory
  116. biology

    Can a snail survive in an aquarium with no living plants in it? What do fish owners do to compensate if their aquarium has no plants?

    asked by roger
  117. statistics

    approximately 300 millions golf balls were lost in the united states in 2009 assume the number of gold balls lost in an 18 hole is distributed as a poisson random variable with a mean of 5 balls

    asked by Anonymous
  118. Chemistry

    At the start of the reaction there are 0.714 mole of H2, 0.984 mole of I2, and 0.886 mole of HI in a 2.70 L reaction chamber. Calculate the concentrations of the gases at equilibrium. The equilibrium constant is 54.3.

    asked by Amy
  119. econ

    Consider the market for trucks. Assume that the demand for trucks is given by 60 2 5 D Q P Y where P is price per truck and Y is the income of the buyers. The supply of trucks is given by 30 5 3 S Q P W where W is the price of all the materials needed to

    asked by des
  120. pre-calculus

    theta=sin^-1 (5/13) ; (x,y)=(-3,1) how do u find the coordinates of x' and y'??

    asked by kikii
  121. science

    Using either or both chapters (6 and/or 7) create a SOAP note using five medical words discussed in this week’s reading. urinary and male reproductive system

    asked by meemee
  122. Chemistry

    1. A solution containing 0.100 mol of Na2CO3 and 0.100 mol of NiCl2 is allowed to react. Which reactant is the limiting reactant? 2. A solution containing 0.100 mol of Na2CO3 and 0.100 mol of NiCl2 is allowed to react. How many moles of precipitate form in

    asked by Eagertolearn
  123. Chemistry

    pH Strip b = 10. Strip D = 3 what would happen if you mixed togather equal amounts of the solutions that produced the results of strip b and strip d?

    asked by Mia
  124. Plz urgent

    Can anyone please answer my chemistry question i posted quick?

    asked by Mia
  125. business math

    The video discusses the logistics involved some of fedex service offering. Fedex ship FOB destination because the seller pays the freight. If there is damage to a domestic freight shipment, fedex will provide up to $50 per pound insurance on new items or

    asked by Akia
  126. math

    Solve each system of equations by graphing. Check each solution. The perimeter of a rectangle is 24 ft. Its length is five times its width. Let x be the length and y be the width. What is the area of the rectangle?

    asked by Anonymous
  127. Math

    Write the following complex number in polar form: z = 4 − 4i

    asked by Alice
  128. Chemistry.

    pH C ( dark green) pH : 8 d ( purple) pH : 3 Suppose u mix togather equal amounts of the solutions that produced the results of strip C and strip D , then test the pH of this new solution. What colo will the indicator paper be ? Explain.

    asked by Mia
  129. Chem

    Hey in class we learned that pi molecular orbitals come from overlapping p atomic orbitals...this occurs in a conjugated system or aromatic rings ( contains sp2 carbons with one remaining p orbital which can can overlap to form double bonds)...my question

    asked by Leena
  130. physics

    A 50kg rocket is fired vertically upwards and experiences a 300N air friction force.What upthrust must the rocke motor produce in order to accelerate the rocket upwards at 6m per second

    asked by Anonymous
  131. Microeconomics

    If fixed cost is $8,000, variable cost is $5,000 at an output of 2 and $9,000 at an output of 3, how much is marginal cost at an output of 3? Can someone show me how to do the formula step by step?

    asked by Lisa
  132. College Algebra

    need help finding the distance using the distance formula please!!! (0,0) (x,y)

    asked by Marie
  133. Chemisry

    What is the % M/M concentration of 5.00 mL of methanol in 25 g solution of methanol in water? The density of methanol is 0.791 g/mL. The density of water is 1.000 g/mL. The density of the solution is 0.995 g/mL. Please show work, thank you!

    asked by Rena
  134. Math

    Find the equation of the secant line to the graph of y= 2x^3-3x^2+4x-1 from x=1 to x=3. Give your answer in slope-intercept form.

    asked by Sam
  135. chemistry

    convert 725mm Hg into equivalent kPa

    asked by Gerry
  136. chemistry

    Calculate the wavelength of a proton with energy 2.45eV. in meter plz

    asked by schoolgirl
  137. chemistry

    what mass of Fe3O4 would conatin 1.85*10^21 atoms of Fe?

    asked by rose
  138. resume

    I am not a english speaker!!!!!!!! i am writing a resume is this statement correct: I am introducing my work: Student focus teaching professional with instructional experience and multicultural knowledge. Currently one of three teachers at Grovetown High

    asked by rita
  139. chem!!!!!!

    empirical formulas" p 889(153e)

    asked by rose
  140. pre calc

    theta=sin^-1 (5/13) ; (x,y)=(-3,1) how do u find the coordinates of x' and y'??

    asked by missie
  141. World History

    Why did the Persians who seemed more powerful lose to Alexander?

    asked by Gregory
  142. World History

    What were Alexander's lasting contributions to society?

    asked by Gregory
  143. Chemistry

    A compound which can donate 2 protons is termed dibasic acid. What is the name given to a compound which can accept 2 protons?

    asked by John
  144. algebra

    electricity costs 7.57 a month plus 8.77 per kilo watt hour for the first 400 kWhr and 6.574 per kWhr for all useage over 400 in a month. what is the cost for 300 kWhr? 2638 What is the cost of 700? 7.57+8.77 times 400 and 6.574 times 300? 5487.77 I think.

    asked by Lori
  145. Math

    Imagine a country has a population of 210 million. Within the country there are 95 million people who are employed workers, 50 million people incapable of working, and 60 million people capable of working, but not actively looking. Based on this

    asked by Hope
  146. social studies

    Which of the following related subjects is listed as a broader term?

    asked by Neslihan
  147. Spanish

    ombina las palabras lógicamente. 1. la langosta 2. la salchicha 3. el ají 4. el caldo 5. el sacacorchos 6. hornear 7. los ingredientes 8. la sal 9. el durazno 10. el aderezo a. el vino b. la toronja c. la sopa d. la receta e. la pimienta f. la ensalada

    asked by Sarah
  148. calculus

    F(x)= log_3 (1-5x) F'(x)=

    asked by Britt
  149. math

    Given two numbers whose sum is 56. Six times the larger is 72 more than 5 times the smaller. Find the numbers. Please help me solve this problem in a simple explanation so I can understand it.

    asked by Traci
  150. science

    How does the temperature change in the sun's atmosphere differ from the temperature change in the sun's interior?

    asked by Stephanie
  151. English

    If the sentence was: Ramai was so nervous that she had already dropped and ____ two dishes. What way would I write BREAK to make it fit into this sentence?

    asked by Kylie
  152. math 83

    3(2/3+3/4)+5(3/4+2/5

    asked by rick twigg
  153. edu

    Ms Sanchez is selecting a picture book to share with her two year olds. She will try to select a book with: a.few pictures so the story is lessened d. detail messages c.simple drawings d.fantasy type illustrations I think d not sure

    asked by ray
  154. Math

    Prove identity Cot⭕sin⭕sec⭕= 1 How would i do this one please help me. Thankyou

    asked by Kristien
  155. calculus

    Find dy/dx by implicit differentiation. x^4 + x^3y + 4y^2 = 7 x cos y + y cos x = 1

    asked by Cole
  156. calculus 2

    integrate e^(2x) / (e^(4x) + 9) am I allowed to simplify the e^(2x) with the e^(4x)? Thank you

    asked by Tom
  157. math

    kylie answered my question but did not go into detail how to solve the problem. Here's the problem I need help with. Given two numbers whose sum is 56. Six times the larger is 72 more than 5 times the smaller. Find the numbers. I need to know step by step

    asked by Traci
  158. physics

    How fast is a city on the earth's equator (such as Singapore) moving due to our planet's daily spin on its axis?

    asked by Dani
  159. Calculus

    F(x) = (x^3 - x + 1)^4 f'(x)=

    asked by Nelly
  160. I need help

    1. What is the organization in the first paragraph of "The Next Big Thing"? (1 point) chronological order compare and contrast problem and solution order of importance 2. Which of the following could not be considered the theme of "Big Yellow Taxi"? (1

    asked by Anonymous
  161. Geography

    Hydrosphere basic facts and what makes up the hydrosphere?

    asked by Robin
  162. College Math

    Could someone please explain the union to me. I don't understand. I get the intersection ones but not union. HElp me? Ecample: (-1,1)U[0,6]

    asked by Marie
  163. science

    Create a SOAP note using five medical words from the urinary or male reproductive system

    asked by micahel
  164. chemistry

    (b) Calculate the amount of zirconium produced (in kg) if a reactor were charged with 310.0 kg and 29.0 kg Na.

    asked by Anonymous
  165. Finance

    You plan to open a retirement account. Your employer will match 50 percent of your deposits up to a limit on the match of $2500 per year. You believe the fund will earn 12 percent per year over the next 30 years, and you will make 30 deposits of $5000,

    asked by katie
  166. Science

    in what ways do you think earth's moon may be similar to mercury

    asked by Angie
  167. Precalc

    Write the complex number z = 2 + 5i in polar form, rounding to the nearest hundredth if needed.

    asked by Jane
  168. Precalc

    The vectors, (2, -1) and (4, 8), are 1)parallel 2)perpendicular 3)neither parallel or perpendicular

    asked by Jane
  169. pysics

    a force of 4N at 30 degree from another force 5Nwk is pointing east. find the resistance of the two forces using parallelogram

    asked by stanley
  170. math

    prove:1) nCr=nCr-r 2) nCr+nCr+1=n+1Crr+1

    asked by stanley
  171. Math Statistics

    The sorting algorithm known as bogosort can be described in pseudocode as: while not isSorted(input): shuffle(input) If we feed bogosort a shuffled array of length n of unique items the distribution of the number of times bogosort checks if the array is

    asked by Nathan