Questions Asked on
February 10, 2013

  1. Ronit

    What is the current through a wire if 240 coulombs of charge pass through the wire in 2.0 minutes?

    asked by Physics
  2. Statistics

    If the probability of a newborn child being female is 0.5, find the probability that in 100 births, 55 or more will be female. Use the normal distribution to approximate the binomial distribution.

    asked by Kayla
  3. Statistics

    The lengths of pregnancies are normally distributed with a mean of 273 days and a standard deviation of 20 days. If 64 women are randomly selected, find the probability that they have a mean pregnancy between 273 days and 275 days.

    asked by Jane
  4. Statistics

    The body temperatures of adults are normally distributed with a mean of 98.6 degree F and a standard deviation of 0.60 degree F. If 36 adults are randomly selected, find the probability that their mean body temperature is greater than 98.4 degree F.

    asked by Maile
  5. math

    graph the line with slope 1/2 passing through the point(-5,-2) find the slope of the line 5x+5y=3 write answer in simplest from consider the line 2x-4y=4 what is the slope of a line perpendicular to this line. what jis the slope of a line parallel to this

    asked by Anonymous
  6. Chemistry

    Consider the following equilibrium: PCl3 (g) + Cl2 (g) yields PCl5 (g) delta H= -92KJ The concentration of PCl3 at equilibrium may be increased by: decreasing the temp (think this is it) adding Cl2 to the system the addition of neon the additio of PCl4

    asked by Robby
  7. Physics

    A dropping ball initial at rest is dropped 1.5m; calculate a) the traveling time of the ball and b) its velocity just before reaching the ground.

    asked by John
  8. Math

    One bottle of shampoo costs $6 for 8 ounces. A second bottle costs $4 for 5 ounces of shampoo. Which has the lower unit rate? How much lower?

    asked by Wyatt
  9. chemistry

    if thermometer is miscalibrated to read 1.0 degree celsius higher than actual temperature over its entire scale how will it affect molar mass of solute?

    asked by Anonymous
  10. Chemistry

    At 900.0K, the equilibrium comstant (kp) for the following reaction is 0.345 2SO2 (g) + O2 (g) yields 2SO3 (g) At equilibrium the partial pressure of SO2 is 35.0 atm and that of O2 is 15.9 atm. What is the partial pressure of SO3 in atm? 6.20 X 10-4 ( I

    asked by Robby
  11. chemistry

    2KI+Pb(NO3)2=2KNO3+PbI2 suppose a solution containing 1.25g of KI is combined with a solution containing 2.42g Pb(NO3)2 _what mass of the yellow PbI would result what is the limiting reactant How much in grams of the excess reactant was used how much in

    asked by may
  12. physics

    The voltage across a membrane forming a cell wall is 80.0 mV and the membrane is 8.80 nm thick. What is the electric field strength? (The value is surprisingly large, but correct. Membranes are discussed in Section 19.7* of the textbook.) You may assume a

    asked by taryn
  13. chem

    A certain first-order reaction has a rate constant of 2.75 10-2 s−1 at 20.°C. What is the value of k at 50.°C if Ea = 75.5 kJ/mol? i know to use the ln(k1/k2)= (ea/R)((1/T1)-(1/T2)) but how do i know what T2 is when i only have one temp? there is a b

    asked by Hannah
  14. Chemistry

    Consider the following equilibrium: NH4Cl(s)--->NH3(g) + HCl(g) Suppose a vessel containing NH4Cl(s), NH3(g) and HCl(g) is at equilibrium. If the volume of vessel is instantaneously doubled while keeping the temp constant when a new equilibrium is reacted,

    asked by Lisa
  15. physics

    A 1-m-tall barrel is closed on top except for a thin pipe extending 5 m up from the top. When the barrel is filled with water up to the base of the pipe ( 1 m deep ). The water pressure on the bottom of the barrel is 10 kPa. What is the pressure on the

    asked by jay
  16. physics

    In nuclear fission, a nucleus splits roughly in half. (a) What is the potential 4.00 10-14 m from a fragment that has 58 protons in it? (b) What is the potential energy in MeV of a similarly charged fragment at this distance?

    asked by taryn
  17. Chemistry

    2NF3(g) yields N2(g) + 3F2(g) When 2.06 mol of NF3 is placed in a 2.00L container and allowed to come to equilibrium at 800K, the mixture is found to contain 0.0227 mol of N2. What is the value of Kp at this temp? 1.91 X 10-3 1.73 X 10-6 (think this is it)

    asked by Robby
  18. maths

    a chimney of 20m height standing on the top of a building subtends an angle whose tangent is 1/6 at a distance of 70m from the foot of the building find the height of the building .

    asked by Anonymous
  19. Math

    Reasoning It costs $7 for a matinee and $8 for an evening movie. With $56, would you be able to buy more matinee tickets or evening tickets? Explain.

    asked by Quan
  20. physics

    In nuclear fission, a nucleus splits roughly in half. (a) What is the potential 4.00 10-14 m from a fragment that has 58 protons in it? (b) What is the potential energy in MeV of a similarly charged fragment at this distance?

    asked by taryn
  21. physics

    A rock is dropped from a treetop 19.6 m high, and then, 1.00 s later, a second rock is thrown down. With what initial velocity must the second rock be thrown if it is to reach the ground at the same time as the first? I'm not sure how to find the initial

    asked by Wes
  22. Math

    Explain It Why is 10-0=10, but 0/10=0? Explain

    asked by Mark
  23. Chemistry

    A solution contains 10.0 g pentane, C5H12, 10.0 g hexane, C6H14 and 10.0 g benzene, C6H6. What is the mole fraction of hexane? I figured the equation would be: ___ M Hexane x 10 Divided by 30 =Mole fraction of Hexane?

    asked by Marcus
  24. Calc

    A a conical container of radius 5ft and height 20ft is filled to a height of 18ft of a liquid weighing 50.6lb/ft^3. How much work will it take to pump the contents to the rim? How much work will it take to pump the liquid of a level of 2ft above the rim?

    asked by Anonymous
  25. STAT

    Do you view a chocolate bar as delicious or as fattening? Your attitude may depend on your gender. In a study of American college students, Rozin, Bauer, and Catanese (2003) examined the importance of food as a source of pleasure versus concerns about food

    asked by Nickie
  26. Chemistry

    2C2H2 + 5O2 -> 4CO2 + 2H2O + energy What does the equation communicate about the relative energy of the chemical bonds in the reactants and products? The intermolecular bonds of the reactants are weaker than that of the products' because the products'

    asked by A Canadian
  27. Statistics

    There are two different formulas or methods that can be used to calculate SS. under what circumstances is the definitional formula easy to use?

    asked by Anonymous
  28. ap chemistry

    Iron pyrite (FeS2) is the form in whichmuch of the sulfur exists in coal. In the combustion of coal, oxygen reacts with iron pyrite to produce iron(III) oxide and sulfur dioxide, which is a major source of air pollution and a substantial contributor to

    asked by cheri
  29. physics

    A point charge of -4.00 is at the origin, and a second point charge of 6.00 is on the axis at = 0.850 . Find the magnitude and direction of the electric field at each of the following points on the axis. a) x=25.0cm b) x=1.10m c) x=-15.0cm

    asked by Zac
  30. physics

    A bat moving at 3.7 m/s is chasing a flying insect. The bat emits a 36 kHz chirp and receives back an echo at 36.79 kHz. At what speed is the bat gaining on its prey? Take the speed of sound in air to be 340 m/s.

    asked by Anonymous
  31. Chemistry Help

    The ΔHvap of a certain compound is 34.68 kJ·mol–1 and its ΔSvap is 93.60 J·mol–1·K–1. What it the boiling point of this compound?

    asked by Mike
  32. Physics

    The drawing shows a square, each side of which has a length of L = 0.25 m. Two different positive charges q1 and q2 are fixed at the corners of the square. Find the electric potential energy of a third charge q3 = -5 x 10-9 C placed at corner A and then at

    asked by Anonymous
  33. chemistry

    A definite amount of NH4cl was boiled with 100ml of 0.8N naoh for complete reaction . After the reaction mixture containing excess of naoh was neutralized with 12.5ml of 0.75N NH2so4. Calculate the amount of NH4cl taken. I want you to explain about 100ml x

    asked by Fai
  34. Physics

    Light from a sodium lamp (lambda = 589 nm) illuminates two narrow slits. The fringe spacing on a screen 150 cm behind the slits is 4.0 mm. What is the spacing b/w the two slits (in mm)?

    asked by Michael
  35. Chemistry

    What is the vapor pressure of a aqueous solution containing 10 % (by weight) ethylene glycol (62 g/mol) at 25 °C. PH2O = 24.3 torr at 25°C?

    asked by Marcus
  36. finance

    Tater and Pepper Corp. reported free cash flows for 2012 of $43.1 million and investment in operating capital of $26.1 million. Tater and Pepper incurred $14.0 million in depreciation expense and paid $29.7 million in taxes on EBIT in 2012. Calculate Tater

    asked by steve
  37. Physics

    Two identical point charges (q = +4.60 x 10-6 C) are fixed at opposite corners of a square whose sides have a length of 0.510 m. A test charge (q0 = -4.80 x 10-8 C), with a mass of 9.80 x 10-8 kg, is released from rest at one of the corners of the square.

    asked by Anonymous
  38. Chemistry

    Calculate the pH for each of the following cases in the titration of 50.0 mL of 0.200 M HClO(aq) with 0.200 M KOH(aq). The ionization constant for HClO can be found here. A. Before any addition of KOH B. After addition of 25.0 mL of KOH C. After 30.0 mL of

    asked by Kathy
  39. maths

    Robert cut 3 4 of a loaf of bread in half. Which equation can be used to determine the fraction of the whole loaf represented by each piece n ?

    asked by Anonymous
  40. Math 120

    Suppose there is a pile of quaters, dimes, an pennies with a total is $1.06, How much of each coin can be present without being able to change for a dollar? If there are multiple selection of coins that will work

    asked by Enis
  41. Math

    Two boats leave a dock at the same time. One heads due east at 20 mph, and one heads due south at 15 mph. How far apart are the two boats after 45 minutes have elapsed?

    asked by Barb
  42. math 7

    if you have 8 marbles in the bag (5 blue and 3 green) and you draw 2 with replacement, what is the theoretical probability that both marbles wil be green how does the probability of getting two greens change if you are not replacing?? if you have 8 marbles

    asked by unknown.gonegirl
  43. chemistry

    in an attempt to establish the formula of an oxide of nitrogen , a known volume of the pure gas was mixed with hydrogen and passed over a catalyst at a suitable temperature. 100% conversion of the oxide to ammonia and water was shown to have taken place.

    asked by harish
  44. chemistry

    describe how you would prepare 500ml of a solution containing 0.025M sodium acetate and 0.001% w/v starch.

    asked by Anonymous
  45. Physics please help

    During an action potential, Na^+ ions move into the cell at a rate of about 3x10^-7 mol/m^2*s. How much power must be produced by the "active Na^+ pumping" system to produce this flow against a +30-mV potential difference? Assume that the axon is 40cm long

    asked by John
  46. AMBIGUOUS CASE OF SINE LAW

    Triangle DEF where triangle E = 144 degrees, e = 10.5m and f = 12.5m. Determine the number of possible triangles that could be drawn with the given measures. Then, find the measure of the other angles in each possible triangle.

    asked by hitesh
  47. Managerial Economics

    Suppose your marketing department does a survey of potential users and finds that these users place the following values on the two versions of your software. Software Version Home Users Commercial Users Full featured version $175 $225 Disable version $150

    asked by Gregg
  48. Precalculus

    Suppose daily operating profit, in dollars, for a movie theater is a function of the number of tickets sold with the rule P(x)=8.5x-2,500, for 0≤x≤1,000. a) Explain why the profit function has an inverse b) P(400)=900. Rewrite this equation in terms of

    asked by Gabriel
  49. Chemistry

    When 1.150 grams of an unknown nonelectrolyte dissolves in 10.0 grams of water, the solution freezes at -2.16°C. What is the molecular weight of the unknown compound? Kf for water = 1.86°C/m. -2.16 x m/-1.86 = 1.16 1.16/ .010 kg of water= 116 1.150/116=

    asked by Marcus
  50. finance

    Thelma and Louie's Inc started the year with a balance of retained earnings of $547 million and ended the ear with retained earnings of $594 million. The company paid dividends of $37 million to the preferred stockholders and $77 million to common

    asked by steve
  51. physics

    As your bus rounds a flat curve at constant speed, a package with mass 0.900 , suspended from the luggage compartment of the bus by a string 46.0 long, is found to hang at rest relative to the bus, with the string making an angle of 27.0with the vertical.

    asked by Alex
  52. trig

    Two people decide to estimate the height of a flagpole. One person positions himself due north of the pole and the other person stands due east of the pole. If the two people are the same distance from the pole and a = 30 feet from each other, find the

    asked by Tina
  53. science

    Two capacitors are identical, except that one is empty and the other is filled with a dielectric (k = 3.8). The empty capacitor is connected to a 16 -V battery. What must be the potential difference across the plates of the capacitor filled with a

    asked by Anonymous
  54. Chemistry

    HCl (aq) + NaOH (aq) -> NaCl (aq) + H2O (l) Will the neutralisation reaction be endothermic or exothermic? Hint: think about the net ionic equation. So, taking the hint, I got: OH- + H+ -> H2O Not sure how that helps, and now I'm stuck; how would I figure

    asked by A Canadian
  55. math

    A friend gave me 1/2 a candy bar and i ate 1/5 of it. How much did she eat?

    asked by daya
  56. Chemistry

    The first-order rate constant for the decomposition of N2O5, 2N2O5(g) --> 4NO2(g) + O2(g), at 70 degrees C is 6.82 x 10^-3 s^-1. Suppose we start with .0208 mol of N2O5(g) in a volume of 2.2 L. How many minutes will it take for the quantity of N2O5 to drop

    asked by M
  57. Chemistry

    What is the molality of an aqueous solution that is 10.0% ethanol, C2H5OH, by mass?

    asked by Marcus
  58. Chemistry

    What mass of water must be used to dissolve 20.0 grams of ethanol, C2H5OH, to prepare a 0.0500 molal solution of ethanol?

    asked by Marcus
  59. Math

    Explain It Adam made 19 paper cranes Monday and 8 more Tuesday. He gave 9 friends an equal number of cranes. How many cranes did each friend received? Explain how you found your answer.

    asked by TJ
  60. chemistry

    Silicon carbide is one of the hardest materials known. It is often known commercially as carborundum. Silicon carbide is used primarily as an abrasive for sandpaper and is manufactured by heating common sand (silicon dioxide, SiO2) with carbon. - What mass

    asked by may
  61. Physics

    A jet aircraft is accelerating at 4.3 m/s2 as it climbs at an angle of è = 44° above the horizontal (see figure). What is the total force that the cockpit seat exerts on the 77 kg pilot?

    asked by Anonymous
  62. Chemistry

    Are my answers correct? C6H14 + 19/2 O2 -> 6 CO2 + 7H2O enthalpy change = -4163 kJ a) if 0.537 mol of carbon dioxide is produced in the reaction represented by the equation above, how much heat is released by the reaction? Enthalpy change = 0.537 mol CO2 x

    asked by A Canadian
  63. chem

    The activation energy of a certain reaction is 65.7 kJ/mol. How many times faster will the reaction occur at 51°C than at 8°C? State the assumptions you need to make in order to perform this calculation. (Select all that apply.) The collision model and

    asked by Hannah
  64. MATH116

    Two forces of magnitudes 60 Newtons and 80 Newtons make an angle of 30 with each other and are applied to an object at the same point. Find the following: 1. the magnitude of the resultant force, and 2. to the nearest degree the angle it makes with the

    asked by Tricia
  65. Physics

    A container having a volume of 1 m3 holds 90 mol of helium gas at 176 ◦ C. Boltzmann’s constant is 1.38 × 10 −23 J/K. Assuming the helium behaves like an ideal gas, what is the average kinetic energy per molecule? Answer in units of J

    asked by Conor
  66. Pre calculus

    Tanx + sinxsecx/ cscxtanx

    asked by Kristen
  67. chemistry

    Which statement is the best example of pseudoscience? Mike joined a group that studies phrenology. C.J. joined a group that studies endangered species. Katarina joined a group that studies herbal remedies. Lee joined a group that studies stars and planets

    asked by samantha
  68. math

    A disc-shaped spinner has five sections with the following colors and central angles: Blue, 60; Red, 120; Green, 45; Red, 45; and Yellow, 90. Determine the probability for one spin of the spinner. P(B U G)

    asked by Tina
  69. physics

    For a certain transverse wave, the distance between two successive maxima is 1.26 m and eight maxima pass a given point along the direction of travel every 12 s. Calculate the wave speed.

    asked by Anonymous
  70. Chemistry

    What would be the pH of a soda water made by saturating pure water with pure CO2 at 1 atm pressure?

    asked by Ashley
  71. physics

    The voltage across a membrane forming a cell wall is 80.0 mV and the membrane is 8.80 nm thick. What is the electric field strength? (The value is surprisingly large, but correct. Membranes are discussed in Section 19.7* of the textbook.) You may assume a

    asked by taryn
  72. Precalculus

    The application of one function followed by the application of a second function to the result of the first as in F^-1(f(x)) is called composition of functions. The two functions need not be inverse of each other. In a diagram, the output of one function

    asked by Julie
  73. algebra

    When a tennis ball is dropped, it rebounds to 70% of its initial height. If we drop a tennis ball from 10 ft, determine the total distance traveled by the ball after 10 bounces.

    asked by Jennah
  74. math

    The application of one function followed by the application of a second function to the result of the first as in F^-1(f(x)) is called composition of functions. The two functions need not be inverse of each other. In a diagram, the output of one function

    asked by Julia
  75. Chemistry

    Because the mass of the reactants equal to the mass of the product of a reaction, the number of moles will be conserved. -I think this is sometime true but I don't know a way to prove that it sometime true. Anyone got an idea ? Thanks

    asked by Shadow
  76. stats

    A clothing company employs 36 workers on first shift and 19 workers on second shift. Five workers are chosen at random to be interviewed about the work environment. Find the probability of choose: a) All first-shift workers b) all second-shift workers c)

    asked by Kristi
  77. finance

    Thelma and Louie's Inc started the year with a balance of retained earnings of $547 million and ended the ear with retained earnings of $594 million. The company paid dividends of $37 million to the preferred stockholders and $77 million to common

    asked by steve
  78. Physics

    boy pushes a 3.3-kg book against a vertical wall with a horizontal force of 43 N. What is the minimum coefficient of friction that will keep the book in place without sliding

    asked by Emilio
  79. physics

    State only Gauss law in integral form.Use it to find out electric field due to an isolated homogeneous sphere of charges at an outside point.

    asked by mania
  80. physics

    The voltage across a membrane forming a cell wall is 80.0 mV and the membrane is 8.80 nm thick. What is the electric field strength? (The value is surprisingly large, but correct. Membranes are discussed in Section 19.7* of the textbook.) You may assume a

    asked by taryn
  81. ap chemistry

    We drop 37.4 grams of magnesium into 461 mL of a 3 M HCl solution. What is the maximum volume of dry hydrogen that could be produced by this reaction at STP? Mg(s) + 2HCl(aq) ! MgCl2(aq) + H2(g) Answer in units of liters

    asked by cheri
  82. physics

    The linear momentum of a body can be calculated by multiplying its mass by the Question 1 options: time during which the mass moves. distance the mass moves. acceleration of the mass. velocity of the mass. Save

    asked by nicole pierre
  83. chem

    The ΔHvap of a certain compound is 34.68 kJ·mol–1 and its ΔSvap is 93.60 J·mol–1·K–1. What it the boiling point of this compound?

    asked by Mark
  84. Chemistry

    Please help me figure out where I went wrong. HNO3 + KOH -> KNO3 + H2O enthalpy change = -53.4 kJ/mol 55.0 mL of 1.30 mol/L solutions of both reactants, at 21.4°C, are mixed in a calorimeter. What is the final temperature of the mixture? Assume the

    asked by A Canadian
  85. Geometry

    URGENT PLEASE HELP please help me understand how to draw a net, am i supposed to memorize these or is there a method for drawing nets for different shapes.

    asked by haley
  86. Physics

    The three forces shown in the figure below act on a particle (with F1 = 50.0 N, F2 = 60.0 N, θ1 = 60.0°, and θ2 = 30.0°). If the particle is in translational equilibrium, find F3, the magnitude of force 3 and the angle θ3.

    asked by Nerise
  87. chemistry

    If you were asked to convert 25 cg to the unit hg, which of the following would be the first fraction used in the conversion?

    asked by samantha
  88. Algebra

    Week 3 Word Problem You live 15 blocks (3/4 of a mile) from RACC. Your car is in for service so you decide to walk to class. Walking at a speed of 4 miles per hour, what is the latest time you can leave your home to be on time for your 10:00 am class in

    asked by Lisa Lisa
  89. Physics 11

    A girl stands 2.5 m infront of a plane mirror. If she sees someone else 2.0 m behind her, how far is she from the image of that person?

    asked by Abe
  90. Physics Conservation of Energy

    During a rockslide, a 740 kg rock slides from rest down a hillside that is 500 m long and 300 m high. The coefficient of kinetic friction between the rock and the hill surface is 0.18. (a) If the gravitational potential energy U of the rock-Earth system is

    asked by Kevin
  91. Chemistry

    2. What is pH? A.) the negative logarithm of the hydrogen ion concentration B.) the positive logarithm of the hydrogen ion concentration C.) the negative logarithm of the hydroxide ion concentration D.) the positive logarithm of the hydroxide ion

    asked by Cassie
  92. chemistry

    Which of the following is not an example of a science? geology astronomy astrology ecology

    asked by sabrina
  93. Gen Chem II

    Vitamin K is involved in normal blood clotting. When 1.36 g of vitamin K is dissolved in 25.0 g of camphor, the freezing point of the solution is lowered by 4.56 °C. The freezing point and Kf constant for camphor can be found here. Calculate the molar

    asked by Nefret
  94. Trigonometry

    Let's solve this fun trigonometric fun math problem! 1.) SEC²X-1/SIN²X

    asked by AwesomeGuy
  95. AMERICAN GOVERMENT Would someone PLEASE check ans

    1. The source of the Supreme Court’s authority is (D) moral suasion. judicial activism. concurring opinion. dissent. 2. When the Supreme Court hands down a decision, it is (A) often a mixed decision with majority, dissenting, and even concurring

    asked by karen
  96. maths

    Suppose that 10 dice are rolled. Each die is a regular 6 -sided die with numbers 1 through 6 labelled on the sides. How many different sums of all 10 numbers are possible?

    asked by Anonymous
  97. Math

    Teri scored 64 points in the first 8 basketball games she played in. She scored the same number of points in each game. How many points did she score in each game?

    asked by Amari
  98. Biology

    DNA synthesis starts at the Replication Origin. In what way(s) do you think that the Replication Origin might be similar to a Promoter and in what ways might it be different?

    asked by Anonymous
  99. Pre calculus

    Verify Sinx-sinxcos^2x =sin^3x Need every step!!!

    asked by Kristen
  100. Ethics,

    What are the main provisions of Title IX? Why is Title IX considered one of the more controversial measures taken by the federal government in addressing inequality?

    asked by AMY
  101. Urgent Chem Help

    A certain substance has a heat of vaporization of 55.30 kJ/mol. At what Kelvin temperature will the vapor pressure be 3.50 times higher than it was at 361 K?

    asked by Carl
  102. math

    sally has a bag of mixed lollies.The bag contains toffees,mints,fruit drops,smarties,jelly beans,candies and licorice.Sally allows every one in her class to choose 3 lollies,but they must not choose more than one of each kind.How many different

    asked by charls
  103. PHYSICS 2

    A magnetic field is perpendicular to the plane of a single-turn circular coil. The magnitude of the field is changing, so that an emf of 0.98 V and a current of 2.1 A are induced in the coil. The wire is then re-formed into a single-turn square coil, which

    asked by PLEASE HELP
  104. statistics

    a vending machine dispenses coffee into an 8 oz cup. the amount of coffee dispensed into the cup is normally distributed with a standard deviation of 0.03 oz.you can allow the cup to overfill 5 percent of the time. what amont should you set as the mean

    asked by stephanie
  105. PHYSICS

    You drop a ball from a height of 2.8 m, and it bounces back to a height of 1.4 m. (Ignore air resistance.) (a) What fraction of its initial energy is lost during the bounce? (b) What is the ball's speed just as it leaves the ground after the bounce? m/s

    asked by ryan
  106. Trigonometry

    Solve the trigonometric equations. 1.) SIN²x(CSC²x-1) 2.) COT x SEC X 3.) COS²[(π/2)-x]/COS X (Note: These mathematical problems are somewhat tricky, but useful for students as of learning how to their fundamental identities. Let's enjoy solving these

    asked by AwesomeGuy
  107. physics

    A train at rest emits a sound at a frequency of 1089 Hz. An observer in a car travels away from the sound source at a speed of 30.7 m/s. What is the frequency heard by the observer? Assume the speed of sound in air to be 343 m/s.

    asked by Anonymous
  108. Education/Technology

    Removable media are useful for a classroom teacher because they A) are read only. B) cannot be erased accidentally. C) have the greatest capacity of any storage device. D) are portable. I believe the answer is A, is this correct?

    asked by Lori
  109. can any smart person in c++ can answer this?

    A “magic” number is an integer in which the number is equal to the sum of the cubes of its digits. Write a program to determine whether a three digit number entered by the user is a magic number.

    asked by Riana
  110. physics

    In an arcade game a 0.144 kg disk is shot across a frictionless horizontal surface by com- pressing it against a spring and releasing it. If the spring has a spring constant of 164 N/m and is compressed from its equi- librium position by 7 cm, find the

    asked by Anonymous
  111. chemistry

    calculate the dimensions of a cube that contains 22.4L of gas at STP.

    asked by Kelsey
  112. finance

    Thelma and Louie's Inc started the year with a balance of retained earnings of $547 million and ended the ear with retained earnings of $594 million. The company paid dividends of $37 million to the preferred stockholders and $77 million to common

    asked by steve
  113. Physics

    As a crude model for lightning, consider the ground to be one plate of a parallel-plate capacitor and the cloud to be the other plate. The altitude of the cloud is 600m and its area is 6.5 km2. How much charge can the cloud hold before the dielectric

    asked by Youssef
  114. C++

    Question 3: What specific information does the compiler need to perform a successful function call? I figured it was just a function definition, initialized variables, and a function declaration, but I guess I was wrong.

    asked by Anonymous
  115. chemistry

    A definite amount of nh4cl was boiled with 100ml of 0.8N naoh for complete reaction. After the reaction, the reactant mixture containing excess of naoh was neutralized with 12.5ml of 0.75N nh2s04. Calculate the amount of nh4cl takedn The answer 3.78g who

    asked by Fai
  116. probability

    John has 3 unique coins such that the probability of obtaining a head when the coin is flipped is 110, 210 and 310, respectively. If he flips each of the 3 coins once, the probability that at least 1 heads appears is p. What is the value of 1000p?

    asked by john
  117. Algebra

    a poster is 24 cm taller than it is wide. it if is mounted on a piece of cardboard so that there is a 6cm border on all sides and if the area of the border alone is 720 cm squared, what are the dimensions of the poster

    asked by Serina
  118. Finance

    an economic contraction (recession) is now well under way, and the Fed plans to use all facilities at its command to halt the decline. Describe the measures that it may take.

    asked by Jayde M.
  119. math

    If the digits of a number may be any one of 0 through 9 (except the first digit cannot be zero), and the system of alternating signs of coefficients is used to create a polynomial, what is the least number m of real zeros the polynomial can have? What is

    asked by alicia
  120. SOC203

    Which of the following types of income is NOT protected from the low taxation rate of the capital gains tax? (Points : 1) Real estate profits Bonds Salaries Stock investments

    asked by PAT
  121. physics

    A 80 g ice cube at 0°C is heated until 55 g has become water at 100°C and 25 g has become steam at 100°C. How much energy was added to accomplish the transformation?

    asked by Anonymous
  122. Jess

    Let f(x)=3x^3 +7.5x +1. In this problem you will estimate f'(3) by computing the average rate of change of f(x)over a small interval. Round your answers to three decimal places. First choose the interval of length .1 with 3 being the left endpoint of the

    asked by Calculus
  123. conceptual physics

    The linear momentum of a body can be calculated by multiplying its mass by the Question 1 options: time during which the mass moves. distance the mass moves. acceleration of the mass. velocity of the mass. Save

    asked by nicole pierre
  124. physics

    A car is traveling at 25m/s when an accident occurs. The car decelerates 300m/s^2 but the passenger does not slow down because he is not wearing a seatbelt. a) Supposing the distance between the passenger and the dashboard is initially 0.50m, what will be

    asked by rob
  125. math

    Sally has 6 more than three times the number of shoes Sandra has. If, (s) is the amount of shoes Sandra owns,which expression show the amount of Sally's shoes. A. 3+6s B 3s-6 C. 6-3s D. 6+3s

    asked by vera
  126. Science (8th grade)

    I still am confused about the snail lab things... Ms. Sue helped me with the calculate, but I still have a question... Calculations: .136 cm/s .000136 m/s .4896 m/h Calculate how long it will take your snail to cross a sidewalk(2m) cross a road(20m). How

    asked by Ji
  127. math

    a wheel makes 8 1/10 revolutions per minute if it rotates for 85 mins. how many revolutions will it make

    asked by melissa
  128. Algebra

    An investor invested a total of 1,400 in two mutual funds. One fund earned a 8% profit while the other earned a 3% profit. if the investor's profit was $67, how much was invested in each mutual fund?

    asked by tootles
  129. algebra

    a consultant advices the owners of a beauty salon that their profit p each month can be modeled by p(x) = - 50 x2 +3500 x- 2500

    asked by Anonymous
  130. chemistry

    A definite amount of nh4cl was boiled with 100ml of 0.8N naoh for complete reaction. After the reaction, the reaction mixture containing excess of naoh was neutralized with 12.5ml of 0.75N nh2s04. Calculate the amount of nh4cl taken. The answer 3.78g who

    asked by Fai
  131. physics

    1) A car, initially traveling with a uniform velocity, accelerates at a rate of 1.0 m/s2 for a period of 12.0 seconds. If the car traveled 190.0 m during this 12.0 second period, what was the velocity of the car when it started to accelerate?

    asked by sana
  132. math

    study the function table below. vases flowers 4 12 7 21 8 24 11 33 v f Which expression could be used to find the number of flowers(f) IN (v) vases My answer is A.Is that correct?

    asked by vera
  133. Calc

    find the limit as t approaches x of ((1/t)-(1/9))-(t-9).. help please thank you

    asked by Anonymous
  134. PHYSICS ASAP!!

    An office window has dimensions 3.6 m by 1.6 m. As a result of the passage of a storm, the outside air pressure drops to 0.95 atm, but inside the pressure is held at 1.0 atm. What net force pushes out on the window?

    asked by Anonymous
  135. Physics

    Rutherford, Geiger, and Marsden (his students) fired a beam of alpha particles at a gold foil. The alpha particles had an energy of about 3.6 million electron volts, a charge of +2e, and a mass of about four AMU (one Atomic Mass Unit is 1.66 x 10-27 kg.

    asked by Youssef
  136. physics

    The linear momentum of a body can be calculated by multiplying its mass by the Question 1 options: time during which the mass moves. distance the mass moves. acceleration of the mass. velocity of the mass. Save

    asked by nicole pierre
  137. Algebra

    simplify 9to 6th power times 3 to the 7th power all over 9 to the 8th power times 3 to the 6th power

    asked by Katelyn
  138. Entropy question

    What is the absolute entropy of 2.5 mol of gaseous methane at 1.3 bar and 298 K?

    asked by Jason
  139. chemistry

    an aqueous solution contains 1 mol of S2O3 ions and this reduces 4 mol chlorine molecules.What is the sulphur containing product of this reaction?

    asked by harish
  140. English (urgent)

    can you give me 4 examples of informative texts..or websites where can I look for informative texts--4 paragraph informative texts...(i need it now)really urgent...please...

    asked by daphnie
  141. chemistry

    an aqueous solution contains 1 mol of S2O3 ions and this reduces 4 mol chlorine molecules.What is the sulphur containing product of this reaction?

    asked by harish
  142. Physics Grade 11

    12kg box is placed on a rough surface. A force of 20N is applied at an angle of 30 degrees. Calculate the magnitude and direction of the normal and friction forces

    asked by Sybil
  143. physics

    A 2000 watt heating element is connected in parallel to a 100 watt bulb across 200 volt source. Determine the total power and heat generated in the combination for 1.5 hours. help!

    asked by nitz
  144. probability

    John has 3 unique coins such that the probability of obtaining a head when the coin is flipped is 1/10, 2/10 and 3/10, respectively. If he flips each of the 3 coins once, the probability that at least 1 heads appears is p. What is the value of 1000p?

    asked by john
  145. maths-urgent

    a man has 3 unique coins such that the probability of obtaining a head when the coin is flipped is 1 10 , 2 10 and 3 10 , respectively. If he flips each of the 3 coins once, the probability that at least 1 heads appears is p . What is the value of 1000 p ?

    asked by Anonymous
  146. Nurs

    i need to draw a concept map that represents the relationships among the concepts under study for either Middle-range theory, Grand theory, or practice theory. HELP!

    asked by Tabby
  147. Maths

    A farmer deposits R11 944, for 60 months to buy a tractor.suppose that 12 months afta the purchase of the present tractor and every 12 months thereafter,the farmer withdraws R5000 from his account to pay for maintanance of the tractor.If he makes such

    asked by Lucas
  148. statistics

    this is a problem in my statistics class, and I am lost to me, it is confusing or missing something here is the problem please help grade points are assignede as follows: a=4,b=3,c=2,d=1,f=0. grades are weighted according to credit hours. if a student

    asked by Cyn
  149. chemistry

    HCOOH(aq) H^+ (aq)+ HCOO^-(aq) The equilibrium constant (Ka) for Reaction 3 at 25 °C is 1.80 × 10−4 mol dm−3. Calculate the equilibrium concentration of hydrogen ions if the concentration of formic acid at equilibrium is 0.00500 mol dm−3

    asked by Mark
  150. Physics Conservation of Energy

    During a rockslide, a 740 kg rock slides from rest down a hillside that is 500 m long and 300 m high. The coefficient of kinetic friction between the rock and the hill surface is 0.18. (a) If the gravitational potential energy U of the rock-Earth system is

    asked by Kevin
  151. Science

    Need help with a research topic for a paper on conservation of fresh water. I have to include two disciplines of classes - history and human and family development. Also, I need to integrate a theory - Bandura's theory of modeling? Can anyone help me?

    asked by Brenda
  152. Math-Statistics

    An advisor offers 8 mutual funds in the high risk category, 7 moderate, 10 in low risk. The investor decides to invest in 3 high risk, 4 moderate risk, and 10 low risk. How many ways can he do this?

    asked by Betty
  153. business

    In portfolio analysis, the goal when purchasing leverage items is

    asked by lisa
  154. economic

    Robert withdrew $100,000 from an account that paid 10 percent annual interest and used the funds to purchase real estate. After one year he sold the property for?

    asked by markyk
  155. Ethics, Please HELP

    What do labeling theorists say about the treatment of the disabled by society? Be sure to address, and give examples of, overt and covert ways that society labels people with disabilities.

    asked by AMY
  156. Chem

    Calculate the reaction quotient Q,for the cell reaction.The measured cell voltage is given.balane the chemical equation by using the smallest whole number coefficients. (a) Pt(s)Sn4+(aq),Sn2+(aq)||pb2+(aq),pb2+|C(graphite)(s) -E=+1.33V

    asked by Prisca
  157. Chemistry

    Calculate the pH of a water sample from a playa lake in the western US that has the evaporite mineral potassium bicarbonate (KHCO3) at a concentration of 0.009 mol/kg. Assume the water is in equilibrium with the atmosphere (PCO2 = 10-3.4 bar) and the

    asked by Ashley
  158. Speech 09

    I need to create a communication model in my speech class. My characters are Scout and Jem (TKAM) I need to write a communication model script. It should have these words in them: Context, message, feedback, channel, Encode, Decode, receiver, sender,

    asked by Darcy
  159. math

    Alex buys a magazine for $8 and some candy bars for $2 each. He spendss a total of $22. Which equation would you use tofin how many candy bars (b) Alex bought? a. 8-2b=22 b. 2-22b=8 c. 22-8b=2 d. 8+2b=22

    asked by vera
  160. SS8R - HELP!!!!

    Booker T Washington and W.E.B. Du Bios continue to argue for the needs of African Americans until Washington’s death in November 14, 1915. Washington wants segregation but Bu Bios does not. Today African American..... I need something else for my last

    asked by Laruen
  161. Spanish

    Translate: I have a big nose. Is it: Tengo la nariz grande. or : Tengo una nariz grande. My teacher says you must use el, la, los, and las with body parts.

    asked by Joe
  162. physical science

    a metal power/laundry line which hang droop on a very warm day

    asked by boitumelo lipheko
  163. math

    Harper is two times older than her brother Bill. Let (b) represent Bill's age. Which expression could be used to solve Harpers age? a. 2b b. b divided by 2 c. 2+B C. B-2 mY ANSWER IS B. IS THAT CORRECT?

    asked by vera
  164. ap chemistry

    We observe that 5 grams of a gaseous com- pound occupies 1526 mL at 49C and 672 torr. What is the molecular weight of the com- pound? Answer in units of g/mo

    asked by cheri
  165. math 3 grader

    Sort these numbers describe your sort rule 5, 10, 16, 19, 24, 37, 40

    asked by rayan
  166. college algebra

    Please show me the steps to solving this equation:-) √5(x-1.2)-√3x

    asked by Anonymous
  167. physics

    2.Explain Electric field and Electronic field intensity.

    asked by mania
  168. reading

    I need and analogy example from the bood The Outsiders.

    asked by Chance
  169. chemistry

    an aqueous solution contains 1 mol of S2O3 ions and this reduces 4 mol chlorine molecules.What is the sulphur containing product of this reaction?

    asked by harish
  170. mathamatices

    A square is of side 4dm, find its area in cm square.

    asked by Prashant
  171. Math

    A ball is tossed straight upward with an initial velocity of 80 ft per second from a rooftop that is 12 feet above ground level . The height of the ball in feet at time t seconds is given by h(t)= -16t^2 +80t+12 find maximum height above ground level the

    asked by Kiley
  172. STAT

    Numerous studies have found that males report higher self-esteem than females, especially for adolescents (Kling, Hyde, Showers, & Buswell, 1999). Typical results show a mean self-esteem score of M  39.0 with SS  60.2 for a sample of n  10 male

    asked by Nickie
  173. physics

    If electrical energy cost 5.00 per kilowatt hour, what will be the daily cost of using a 50 watt bulb for 4 hours a day when connected across a 220 volt source?, help please!

    asked by nitz
  174. Life oretation

    Provid 5 ways in which you critically discuss how habit behaviour impact on teenager

    asked by Sonwabile
  175. maths-urgently needed

    A man invests Rs 3,20,000 for 2 years at 12.5% p.a. compounded annually. If the income tax at the rate of 20% is deducted at the end of each year, on interest accrued, find the amount he received at the end of 2 years.

    asked by Anonymous
  176. Precalculus (Please Help!!??)

    The formula for the area of a circle and the volume of a sphere an be though of as functions of the radii of the shapes. (Anything you could answer would be so helpful) Thank you!! a) Write a rule expressing the area of a circle as a function of its

    asked by Julie
  177. physics

    If an electron travels 0.250 m from an electron gun to a TV screen in 32.0 ns, what voltage was used to accelerate it? (Note that the voltage you obtain here is lower than actually used in TVs to avoid the necessity of relativistic corrections.)

    asked by taryn
  178. chemistry

    20% of HNO3 reacts with 10g of Caco3 by weight then find the quantity of HNO3?

    asked by Anand mishra
  179. math

    If the digits of a number may be any one of 0 through 9 (except the first digit cannot be zero), and the system of alternating signs of coefficients is used to create a polynomial, what is the least number m of real zeros the polynomial can have? What is

    asked by alicia
  180. mechanics of materials

    A cylindrical tank with flat endplates is constructed from two sections that are welded together circumferentially.The outer diameter of the tank is 1.20, and the wall of the tank is 20.0 mm thick and the mamimum internal pressure is 2.00 MPa. (a)

    asked by dmkp
  181. life Orientation

    What, according to the Basic Conditions of employment Act applies with regard to the contraventions that you've identified?

    asked by MURPHY
  182. math

    2.58*10^(-5)watts/cm2 find the number of decibels for the power of the sound given. Round to the nearest decibel.

    asked by Andrzej
  183. accounting

    I need help, do not want the answer just stuck on how to solve this one. Here is the problem Elkins Company sold $2,500,000, 8%, 10-year bonds on July 1, 2011. The bonds were dated July 1, 2011, and pay interest July 1 and January 1. Elkins Company uses

    asked by newbie2school
  184. rate constant

    A reaction has a rate constant of 1.25×10−4 at 28 and 0.227 at 77. Determine activation barrier for reaction What is the value of the rate constant at 18?

    asked by charlie
  185. socology

    what is the meaning of ventilation and space of structures

    asked by tijani
  186. math

    The bank gave jennifer $20 to start a savings account. Each month Jennifer added the same amount, $13. Which expression shows how much money Jennifer has after (m) number of months? A. 20m B. 20m+13 C. 20+13M D. 13m*20

    asked by vera
  187. math

    Study the in/out taable. In(p) Out 1 3 2 7 3 11 4 15 5 ? Which expressions give the output if (p) is the input? A. p+3 B. 2p+1 C. 2p+3 D. 4p-1

    asked by vera
  188. statistics

    The mean of 3 consecutive multiples of 3 is equal to A.The mean of 4 consecutive multiples of 4 is equal to A + 27. The mean of the smallest and largest of these 7 numbers is 42. Find A

    asked by Anonymous
  189. math

    Study the in/out table In(x) Out 3 10 5 16 7 22 8 25 x ? which expression give the output if x is in he input? A. 2x-1 B. 3x-1 C. 2x+1 D. 3x+1

    asked by vera
  190. math

    For a field trip 22 students rode in cars, and the rest filled eleven buses. Which equations would you use to find how many students (s) rode buses if 287students were on the trip? a. 287-22s=11 b. 287=22+11S C. 11S-22=287 D. 22=11S-287

    asked by vera
  191. Calculus

    Given a function f(x)=sqrt(100-x^2) Evaluate the integral xsqrt(100-x^2dx) for the interval (0,10)

    asked by Sammy
  192. Calculus

    Differentiate with respect to theta Y=((sin3theta)(tan3theta))^12

    asked by Kate
  193. MATH

    Englewood averaged 17 problems right on the math decathlon. Avalon Park Elementary scored an average of 14 problems right. Which equation show the difference, (d) between the averaged points scored by the Engelwood and Avalon Park? a. d=17x14 b. d=17-14 c.

    asked by vera
  194. chemistry

    In the previous example, how many ml of 0.1M kmn04 are required to react with 30ml of 0.05M h202? the answer 3ml who helps

    asked by Fai
  195. college algebra

    I need to figure out how to solve this equation your help will be much appreciate:-) √5(x-1.2)-√3x

    asked by Anonymous
  196. math

    People who eat losts of fruits and vegetables have lower rates of colon cancer than those who eat little of these foods. Fruits and vegetables are rich in antioxidants such as vitamins A, C, and E. Will taking antioxidants help prevent colon cancer? A

    asked by Please help
  197. math

    a diagonal of a polygon is a straight line joining any 2 non-adjacent corners.a decagon has 10 corners. .how many diagonals does it have ?

    asked by karen
  198. math

    Atdewberry Elementary there are 5 times as many boys than girls. Let (b) represent the number of boys. Which expression shows the number of girls students at the school. a. 5xb b. 5 divided by b c. b divided by 5 d. bx5 my answer is B. Is this correct?

    asked by vera
  199. Geometry

    Why is this statement NOT always true?: The longer diagonal of the rhombus is perpendicular to two sides of the rhombus.

    asked by Sunshine
  200. math statistics

    Marathon runners were randomly assigned to receive either vitamin C or a placebo. Separately, these treatments were also randomly assigned to a group of nonrunners the same age as the runners. All subjects were watched for 2 weeks after the race to see if

    asked by Please help
  201. math statistics

    Marathon runners were randomly assigned to receive either vitamin C or a placebo. Separately, these treatments were also randomly assigned to a group of nonrunners the same age as the runners. All subjects were watched for 2 weeks after the race to see if

    asked by Please help
  202. Math

    Jason is 20 years old. He is 4 times older than his younger brother. Which of the following equations could be be used to figure out the age of Jason's brother? a.20x4 b. 20+4 c. 20 divided by 4 d. 20-4 My answer is A. is that correct?

    asked by vera
  203. math

    taylor was having a party.she invited 20 friends to her party, if each person shook hands with every other person .how many handshakes would there be? please explain,thanks

    asked by mark
  204. MATH

    THERE are six times as many cats at the Orange County Animal Shelter than dogs. Let (c)represent the number of cats at the shelter. Which expressions show the number of dogs at the shelter. a. 6c b. 6+c c. c divided by 6 d. 6-c My answer is C. Is this

    asked by vera
  205. chemistry

    Which of the following is not an example of a science? geology astronomy astrology ecology

    asked by raven
  206. math

    brett is having a party .first guest arrived by himself,3 guests then arrive together,each successive group arrives with 2 more guests than the group that entered previously.How many guests will have arrived when the twentieth group enters the room? please

    asked by anthony
  207. Physics

    A positive and a negative charge are separated a distance r. What can we say about the electric potential energy of this two-particle system, according to our normal definitions of potential energy and work? Select the best answer. a. It is positive b. It

    asked by Youssef
  208. Physics

    Three charges are located at the corners of a rectangle as follows: Charge A: lower left corner, -3.0 μC Charge B: upper left corner, -6.1 μC Charge C: upper right corner, +2.7 μC The distance between A and B is 0.16 m and between B and C it is

    asked by Youssef
  209. MATH

    a car dealer sells a car with the following options: auto or manual transmission,standard or deluxe stereo,air or no air, manual or power locks, 15 or 16 inch tires, fabric or leather seats. how many different configurations can this car be sold in?

    asked by alice
  210. Physics

    You run a race with your friend. At first you each have the same kinetic energy, but then you find that she is beating you. When you increase your speed by 21.0%, you are running at the same speed she is. If your mass is 77.0 kg, what is her mass?

    asked by Jake
  211. maths

    1)is the ring of real polynomials R[X] countable and why ?

    asked by Jess
  212. Chemistry

    Find the initial concentration of NO2 if the concentration after 2.00 min is 0.113. k = 0.331 1/(M * s) 2 NO2 (g) + N2 (g) --> 2 N2O (g) + O2 (g)

    asked by Anna
  213. Speech 09

    I need to create a communication model in my speech class. My characters are Captain Hook and Peter Pan. I need to write a communication model script. It should have these words in them: Context, message, feedback, channel, Encode, Decode, receiver,

    asked by Leyla
  214. STAT

    Functional foods are those containing nutritional supplements in addition to natural nutrients. Examples include orange juice with calcium and eggs with omega-3. Kolodinsky, et al. (2008) examined attitudes toward functional foods for college students. For

    asked by Nickie
  215. calculus

    Find the values of p for which the following series is convergent. The sum from n=2 to infinity of 1/(n(ln(n))^p). I tried the integral test using u-substitution, and I know the answer is p>1, but I'm not quite sure how to get there. Thanks for the help.

    asked by Travis
  216. physics

    determine the amount of heat generated per minute by a 120 volt lamp which takes 0.5 amperes. thanks!

    asked by nitz
  217. science

    The equilibrium constant (Ka) for Reaction 3 at 25 °C is 1.80 × 10−4 mol dm−3. Calculate the equilibrium concentration of hydrogen ions if the concentration of formic acid at equilibrium is 0.00500 mol dm−3. (Show all of your working and give your

    asked by Mark
  218. algebra2

    five less than the product of 6 and a number is no more than twice that same number. what is the number?

    asked by stgc
  219. please help quick! Calculus

    solve 6x-2x^3 with first principal

    asked by Jeconiah
  220. Math

    Solve the equation: 4x^2 + 100 = 0 Here is my work: 4x^2 + 100 = 0 - 100 - 100 4x^2 =0 /4 /4 x = -5 or 5. Did I do this correctly?

    asked by Bob
  221. physics 11

    A girl stands 2.5 m infront of a plane mirror. If she steps 0.5 m farther away from the mirror, how far will she be from her image?

    asked by Abe
  222. Chemistry

    . In Flask A, you reacted 5.10 g Mg with 0.447 mol HCl. In Flask B, you reacted 24.21 g Mg with 0.998 mol HCl. Which ballon will inflate the most?

    asked by Tonya
  223. algebra

    Can someone please help me solve (2f^2 g^3) ----------- 4 (3fg) posed to be a fraction bar with the four on the outside of the ()

    asked by steven
  224. mechanics of materials

    A flat plate specimen of a soft metal alloy is to be tested by pulling on round pins inserted through the ends of the plate, as illustrated below (a) Calculate the required diameter of the pins, given that the plate is 8.0 mm thick, the maximum tensile

    asked by dmkp
  225. Math/algebra class

    You live 15 blocks (3/4 of a mile) from RACC. Your car is in for service so you decide to walk to class. Walking at a speed of 4 miles per hour, what is the latest time you can leave your home to be on time for your 10:00 am class in Berks Hall? 1)

    asked by Urgent! running out of time....
  226. MATH

    What is the first derivative of L(x) = ((4+x^2)^0.5) + ((25 + (10-x)^2)^0.5)

    asked by Anonymous
  227. MATH

    find the first derivative for P(x) = a + b (100-x) (x-c) where a and b is positive constant

    asked by Anonymous
  228. math

    This year Martin is twice as old as his sister. If Martin is 12 years old then how old will his sister be next year

    asked by sarah
  229. Math

    Working on a problem and can't figure out how the book rearranged this problem to get the following: 0.76= x/0.0200-x then, the book rearranged to solve for x... x= 0.0200 X 0.76/ 1.76 I don't understand how 1.76 was obtained? I see that you cross multiply

    asked by Linda
  230. Algebra

    There are 21 people. The number of adults is 3 fewer than 5 times the number of children. How many adults are there? How many kids are there?

    asked by Emily
  231. AP Chemistry

    0.015 moles of a compound are dissolved in 18 fl. oz. of water. At what temperature will the solution begin to freeze? The density of water is 1.00g/mL

    asked by Jana
  232. Chemistry

    Explain the raise of bonding angle in these molecules: HF, H2O, NH3 and CH4

    asked by Anonymous
  233. math

    mike measured 2/3 cup of milk. what is 1/4 of the amount of milk?

    asked by kristopher
  234. Math Probability

    5 selected from batch of 50 produced, if one is found defective, than each is tested individually. Find the probability that the entire batch will need testing if the batch contains: 8 defective phones 2 defective phones

    asked by Betty
  235. Probability Help!!!

    5 selected from batch of 50 produced, if one is found defective, than each is tested individually. Find the probability that the entire batch will need testing if the batch contains: 8 defective phones 2 defective phones

    asked by Betty
  236. algebra

    what is a subponent

    asked by jose
  237. SOC

    The Industrial Revolution enticed people to

    asked by Jill
  238. math

    A family group of 6 went to a show. Tickets for adults are $6. Tickets for children are $4 dollars. The family spent $30 dollars on tickets. How many adult and children tickets did they buy?

    asked by max
  239. Chemistry

    What happen when the pink stock solution is heated in a water bath?

    asked by Lele
  240. algebra 2

    5*square root of 5-square root of 45. Help please?

    asked by hockeyfreak2011
  241. MATH

    The formula for the area of a circle and the volume of a sphere an be though of as functions of the radii of the shapes. (Anything you could answer would be so helpful) Thank you!! a) Write a rule expressing the area of a circle as a function of its

    asked by Julie
  242. I.T

    How can you protect your computer from fires, dust extreme temperature and power surges?

    asked by Sasha
  243. Lang. Arts

    Which one of these doors seeems to be the most promising? I had to choose between "seem" and "seems" which I know "seems" is correct, but I also had to say what the subject was. Is it "these" because "doors" was incorrect. Please explain...thanks

    asked by Cassie
  244. math

    how do you find the lenght of a segment with given exponents?

    asked by shekiinna
  245. alg 150 help

    X^2+8X-4=0 what are the 2 answers?

    asked by eddie
  246. alg 150 help

    the width of a rectangle is 9 less than twice the length. if the area os the rectangle is 41cm^2 what is the length of the diagonal?

    asked by eddie
  247. Math_100

    {1} {2,3} {4,5,6} {7,8,9,10} {11,12,13,14,15} 1 is the first element and 2,3 is the second what is the first number in the 100 element of the sequence

    asked by Enis
  248. Math_100

    Would you rather have $200 base 10 or $1000 base on 5? What would be the base for $200. Which I would be better of the two choices

    asked by Enis
  249. Calculus

    If c is a critical value of the function f(x) then evaluate f(c)

    asked by Anonymous
  250. math

    a guy ovserves sun at an angle of 15 degree and after sometime it is 55 degree. what is the time between his observation?

    asked by Vaibhav Yadav
  251. science

    How deep is the wind mixed layer in the Atlantic ocean is the water column stable or unstable

    asked by shela
  252. college algebra

    Need to solve what are the steps to do so? 1.5

    asked by Anonymous
  253. math

    a 3 cm by 3 cm by 3 cm cube is painted all over its outside and is then cut into 27 smaller cubes. How many of these small cubes have paint on more than one face? please explain how you work it out,thanks

    asked by karen
  254. math

    what is the interior angle of a regular polygon

    asked by jade
  255. physical science

    the need for gaps in railway lines

    asked by boitumelo lipheko
  256. math

    i write out all the whole numbers,starting from 1,If i wrote 1994 digits altogether,what was the last complete number i wrote down

    asked by jade
  257. math

    There are a total of 50 students in the Englewood band. 23 of them are boys. Let (g) represent the number of girls in the band. Which equation shows the number of girls in band? a. 50+23=g b. gx23=50 c. g-23=50 d. 50-23=g my answer is B. Is this correct?

    asked by vera
  258. math

    all 4 interior angles of a parallelogram which is not a rectangle are bisected.What shape is always enclosed by the 4 bisectors

    asked by nicky
  259. trig

    what is the exact value of this equation. cos(20) if it equals pi/4

    asked by Anonymous
  260. statistics

    can a placebo be an explanatory variable?

    asked by anonymous
  261. geometry

    cuts across on diagnal saves 1/3 distance of longer side what ratio of short to long side

    asked by Anonymous
  262. math

    how many square feet are there in an area of 1.00 square meters(1ft=0.305m)?

    asked by sam
  263. culture anthropolgy

    one push factor in rural urban migration is

    asked by kenya
  264. MATH

    find a counterexample to prove the following is false: x is less than or equal to 2x

    asked by alice
  265. chemistry

    A definite amount of NH4cl was boiled with 100ml of 0.8N naoh for complete reaction. After the reaction, the reactant mixture containing excess of naoh was neutralized with 12.5ml of 0.75N nh2s04. Calculate the amount of nh4cl taken. The answer 3.78g who

    asked by Fai
  266. Intermediate algebra

    Formulas & advanced ratio expressions: Solving for w: S-2lw =h --------- 2w+2l

    asked by Anonymous
  267. French

    is it true that nananananana batman in french is Que ce que ce que ce que ce batman?

    asked by BATMAN
  268. p

    Derive Gauss law in integral form.

    asked by mania
  269. tudor

    a number that is between 100 and less then 200 and the number is 19 times larger than its sum

    asked by carrie
  270. math

    constract a line segment cd of lenth equal to the lenth of segment ab?

    asked by khushi
  271. Trigonometry

    Google this: 5.1 using fundamental identities Comcast Click and open the first result that appears on your search (Result= PDF Document). Textbook pages will appear and go to page 383 on problem #129. The directions will mention "Solve the right triangle

    asked by AwesomeGuy
  272. chemistry

    The scientist has an IR spectrometer in her lab. She acquires an IR spectrum of compound X and finds a relatively weak intensity absorption at ~2100 cm-1 and some medium to strong absorptions in the 2850~2960 cm-1 region plus a strong absorption at 3300

    asked by Linda
  273. Trigonometry

    Solve the equation. 1.) COS X CSC X

    asked by AwesomeGuy
  274. Math

    A farmer uses 1034 meters of fencing to enclose a rectangular region and also to subdivide the region into three smaller rectangular regions by placing a fence parallel to one of the sides. Find the demensions that produce the greatest enclosed area.

    asked by Jackie
  275. math

    A box contains 1 blue, 2 green, 1 red, and 2 yellow marbles. An experiment consists of randomly selecting two marbles without replacement. What is the probability of not obtaining a yellow marble?

    asked by Tina
  276. Software

    How can you add a program icon to the windows 7 taskbar so the program can quickly be launched at any time?

    asked by DJ
  277. Software

    The questions said List four major functions of an OS? The answer i put was Function 1: Provide a user interface Function 2: Manage files Function 3: Manage hardware Function 4: Manage applications Is my answer correct?

    asked by DJ
  278. english

    Where can I find informative texts? (Long once)also informative text about fiction...

    asked by daphnie
  279. math

    solve the equations by finding the exact solution 3=x-3

    asked by Andrzej
  280. MATH

    Find the value of (x) ? 0 = (300,000x / (16 + x^2) ^0.5) - 200,000

    asked by Anonymous
  281. statistics

    The mean scale score on the mathematics examinatin of ninth graders in Texas was 86 with a standard deviation of 5 points. Given a student was selected at random what is the probability that his score was 91 or higher

    asked by kelly
  282. math

    3Ine=In(ã(3))/(x)-3 Ine

    asked by Andrzej
  283. statistics

    The mean scale score on the mathematics examinatin of ninth graders in Texas was 86 with a standard deviation of 5 points. Given a student was selected at random what is the probability that his score was 91 or higher

    asked by kelly
  284. statistics

    The mean scale score on the mathematics examinatin of ninth graders in Texas was 86 with a standard deviation of 5 points. Given a student was selected at random what is the probability that his score was 91 or higher

    asked by kelly
  285. math

    solve the equations by finding the exact solution this is question from log 3=x-3

    asked by Andrzej
  286. English

    Hello. I'll appreciate some help. Do you think the following structure sounds OK: "It is said in the statement that..."? Thank you very much for your help.

    asked by Ilma
  287. MATH

    What is the first derivative of L(x) = ((4+x^2)^0.5) + ((25 + (10-x)^2)^0.5)

    asked by Anonymous
  288. math

    Will taking antioxidants help prevent colon cancer? A medical experiment divided subjects into four gruops:daily beta-carotene, daily vitamins C and E, all three vitamins every day or daily placebo to determine if they help prevent colon cancer. 1. What

    asked by please help