Questions Asked on
October 25, 2011

  1. College Chemistry

    Write formation reactions for the following. (You must include the states of matter for each atom or compound) A. Ca(NO3)2 (s) B. CH3OH (l) C. NaClO4(s)

    asked by Bekah
  2. arithmetic

    The initial term of an arithmetic sequence is 5. The eleventh term is 125. what is the common difference of the arithmetic sequence?

    asked by Jane
  3. Calculus

    A rancher plans to make four identical and adjacent rectangular pens against a barn, each with an area of 100m^2. what are the dimensions of each pen that minimize the amount of fence that must be used?

    asked by Anonymous
  4. science (PLEASE HELP)

    Heating 1.29 g of gallium gives a gallium-oxygen compound with a mass of 1.73 g. -How many grams of oxygen are in the 1.73 grams of gallium-oxygen compound.

    asked by Jeannie
  5. Probability

    9) A gumball machine has just been filled with 50 black, 150 white, 100 red and 100 yellow gum balls that have been thoroughly mixed. Sue and Jim, each purchased one gumball. What is the likelihood both Sue and Jim get red gumballs

    asked by Anonymous
  6. Chemistry

    Gasohol is a fuel containing ethanol (C2H5OH) that burns in oxygen (O2) to give CO2 and water. How many moles of O2 are needed to completely react with 2.50 moles of ethanol?

    asked by Deborah
  7. math

    The population of a Canadian city is modelled by P(t)=12t^2+800t+40000, where t is the time in years. When t=0, the year is 2007. In what year is the poulation predicted to 300000?

    asked by ashvini
  8. Physics

    Once a 15 kg crate is in motion on a horizontal floor, a horizontal force of 51 N keeps the crate moving with a constant velocity. The acceleration of gravity is 9.81 m/s What is µk, the coefficient of kinetic friction, between the crate and the floor?

    asked by Jack
  9. Calculus

    A balloon is rising vertically above a level, straight road at a constant rate of 1 foot/second. Just when the balloon is 65 feet above the ground, a bicycle passes under it going 17 feet/sec. How fast is the distance between the bicycle and balloon

    asked by Jo
  10. physics--urgent

    A block of mass m = 3.20kg slides from rest a distance d down a frictionless incline at angle θ = 30.0° where it runs into a spring of spring constant 425 N/m. When the block momentarily stops, it has compressed the spring by 22.0 cm. (a) What is the

    asked by Anonymous
  11. Physics

    A bicyclist is coasting straight down a hill at a constant speed. The mass of the rider and bicycle is 55.0 kg, and the hill is inclined at 16.0° with respect to the horizontal. Air resistance opposes the motion of the cyclist. Later, the bicyclist climbs

    asked by Kelsey
  12. literary

    I have to write a comparative essay please review it for me thank you. Antigone and Whale Rider In the play Antigone by Sophocles and movie whale rider directed by Caro. The two characters are Paikea and Antigone they both have similarities in common .Both

    asked by manal
  13. Math ( Word Problem )

    Joel sells ice cream cones at the county fair. he has to rent the equipment for $49 and spend $.043 on ingredients for each one. How many ice cream cones must he sells at $1.10 each in order to make a profit? Write an inequality that represents how many

    asked by Linda
  14. Chemistry(Please help, thank you!!)

    Determine the concentration of a NaOH solution if 27.80mL of NaOH is required to neutralize 10.00mL of a 1.00 M H2SO4 solution. (Hint:Review monoprotic vs. diprotic acids.) would I do (27.80)(10)? Thank you for your help!!

    asked by Hannah
  15. Physics

    In Figure 10-20, the magnitude of the force necessary to stretch a spring is plotted against the distance the spring is stretched. Figure 10-20 (a) Calculate the slope of the graph, k, and show that F = kd, where k = 25 N/m. (b) Find the amount of work

    asked by Claire
  16. physics

    A 6.6 diameter horizontal pipe gradually narrows to 3.6 . When water flows through this pipe at a certain rate, the gauge pressure in these two sections is 30.0 and 26.0 , respectively. What is the volume rate of flow? Answer in m^3/s

    asked by anonymous
  17. Algebra

    algebra 2 trig: A food vendor at a stadium sells hot dogs for $2. At this price, she can sell about 500 hot dogs per day. For every $.25 increase in price, she will sell 25 less hot dogs. The vendor's revenue can be modeled by R=(500-25x)(2+0.25x) Use

    asked by Steve
  18. chemistry

    use standard enthalpies of formation to calculate delta Hrxn for the following reaction. 2H2S(g)+3O2(g)-->2H2O(l)+2SO2(g) express the answer using four significant figures Delta Hrxn = ? kJ

    asked by jen
  19. chemistry

    which of the following samples has the greatest number of atoms 20 million O2 molecules 0.1 mole of Fe 2.0 mole of Ar 100 g of Pb 5 g of He

    asked by payton
  20. Maths Calculus Derivatives & Limits

    Using the definition of the derivative evaluate the following limits 1) Lim h---> 0 [ ( 8 + h )^1/3 - 2 ] / h 2) Lim x ---> pi/3 ( 2cosx - 1 ) / ( 3x - pi)

    asked by Yousef
  21. physics

    A particle A of mass 2kg lies on the edge of a table of height 1m. It is connected by a light inelastic string of length 0.7m to a second particle B of mass 3 kg which is lying on table 0.25m from the edge. If A is pushed gently so that it starts falling

    asked by Prabhjot
  22. chemistry

    use standard enthalpies of formation to calculate delta Hrxn for the following reaction. 2H2S(g)+3O2(g)-->2H2O(l)+2SO2(g) express the answer using four significant figures Delta Hrxn = ? kJ

    asked by jen
  23. math

    a random sample of 42 college graduates who worked during their program revealed that a student spent an averge of 5.5 yeas on the job before being promoted. The sample standard deviation was 1.1 yrs. Using the .99 degree of confidence, what is the

    asked by Dalila
  24. Calculus

    A rancher plans to make four identical and adjacent rectangular pens against a barn, each with an area of 100m^2. what are the dimensions of each pen that minimize the amount of fence that must be used?

    asked by Anonymous
  25. chemistry

    1. if 15.0mL of 4.5 M NaOH are diluted with water to a volume of 500mL, what is the molarity of the resulting solution? 2. in a acid-base titration, 33.65mL of an 0.148 M HCL solution were required to neutralize 25.00mL of a NaOH solution. What is the

    asked by djella
  26. Math

    Show all work You have 92 feet of fencing to enclose a rectangular plot that borders on a river. If you do not fence the side alongthe river, find the length and width of the plot that will maximize the area.

    asked by Liz
  27. calculus

    A child is flying a kite. If the kite is 125 feet above the child's hand level and the wind is blowing it on a horizontal course at 7 feet per second, the child is letting out cord at _____ feet per second when 245 feet of cord are out. Assume that the

    asked by Katie
  28. Pre Calculus

    Exponential growth and decay find the half life of a radioactive substance if 220 grams of the substance decays to 200 grams in 4 years?

    asked by Josh
  29. Finance

    Your client is 40 years old and she wants to begin saving for retirement, with the first payment to come one year from now. She can save 5000 per year; and you advise her to invest it in the stock market, Which you expect to provide and average 9% in the

    asked by Anonymous
  30. physics

    an adult exerts a force of 26n to pull a child across the snow on a sled. The rope joins the sled at an angle of 30 degrees above the horizontal. Ignoring friction, how much work is done in pulling the sled 390m?

    asked by LaToya
  31. Science

    an autographed baseball rolls off of a .70m high desk and strikes the floor .25m away from the base of the desk. How fast was it rolling?

    asked by rolando
  32. Calculus

    An air traffic controller spots 2 planes at the same altitude converging on a point as they fly at right angles to each other. One plane is 150 miles from the point moving at 450 miles per hour. The other plane is 200 miles from the point moving at 600

    asked by Alexis
  33. Chemistry

    If 0.274 moles of a substance weighs 62.5g, what is the molar mass of the substance? 62.5/0.274 = 228.1 Am I on the right track?

    asked by Izzie
  34. Chemistry

    Ok, moving on from my last question, you have 100mL of 0.10M acetic acid with ka = 1.8x10(-5) and add 50mL (0.10M) NaOH.

    asked by Kevin
  35. math

    The height, in metres, of the trajectory of a football is given by h(t)=2+28t-4.9t^2 , where t is the time in flight, in seconds. Determine the maximum height of the football and the time when that height is reached.

    asked by ashvini
  36. physics

    A person can jump a maximum horizontal distance (by using a 45 projectile angle) of 5 m on Earth. What would be the maximum range on Mars, where the acceleration due to gravity is 0.38 g?

    asked by anon
  37. Chemistry Help!!

    How are intermolecular forces different from the forces that bond atoms together into molecules? How are they similar?

    asked by Maci
  38. College Chemistry

    when a 0.702g sample of a mixture of volatile hydrocarbons is burned in a bomb calorimeter with a heat capacity of 4287 J/C, the temperature rises by 4.72 degrees C. How much energy (in kilojoules) is released during combustion?

    asked by Bekah
  39. College Algebra

    Show all work The manufacturer of a CD player has found that the revenue R (in dollars) is R(p)= -4p^2+1280p, when the unit price is p dollars. If the manufacturer sets the price p to maximize revenue, what is the maximum revenue to the nearest whole

    asked by Anonymous
  40. physics

    A skydiver of mass 81.5 kg jumps from a slow-moving aircraft and reaches a terminal speed of 54.9 m/s. (a) What is her acceleration when her speed is 30.0 m/s? (b) What is the drag force on the skydiver when her speed is 54.9 m/s? (c) What is the drag

    asked by Anonymous
  41. Chemistry

    Calculate the pH of a 100mL solution of 0.10M acetic acid ka=1.8x10(-5) i calculated the pH to be 2.87 from the square root of (1.8x10(-5) * 0.1, the negative log gives me the pH. The next question wants you to calculate the pH with 50mL HCl added. I found

    asked by Kevin
  42. Calculus

    A particle is moving along the curve whose equation is (xy^3)/(1+y^2)= 8/5. Assume the x-coordinate is increasing at the rate of 6 units/second when the particle is at the point (1,2). At what rate is the y-coordinate of the point changing at that instant?

    asked by Jo
  43. physics

    A car initially traveling eastward turns north by traveling in a circular path at uniform speed as in the figure below. The length of the arc ABC is 210 m, and the car completes the turn in 38.0 s. (a) What is the acceleration when the car is at B located

    asked by carlton
  44. chemistry

    write the equation of the neutralization of sulfuric acid (H2SO4) with potassium hydroxide (KOH) and write the net ionic equation for the reaction

    asked by Doss
  45. Chemistry

    Calculate the molarity of Na2C204 solution prepared by dissolving 1.2222 grams of pure Na2C204 in enough water to make 500.00 mL of solution.

    asked by Ashley(please help!!!!)
  46. Psychology

    1. cognitive psychology can best be described: a. the study of higher mental processes b. the therapeutic applications of critical thinking. c. the area of psychology which attempts to reduce judgmental thinking. d. a subspecialty of psychology based

    asked by TObby
  47. physics

    whenever two Apollo astronauts were on the surface of the moon, a third astronaut orbited the moon, assume the orbit to be circular and 100 km above the surface of the moon, where the acceleration due to gravity is 1.52 m/s^2. the radius of the moon is

    asked by carlton
  48. physics

    A car initially traveling eastward turns north by traveling in a circular path at uniform speed as in the figure below. The length of the arc ABC is 210 m, and the car completes the turn in 38.0 s. (a) What is the acceleration when the car is at B located

    asked by carlton
  49. english

    I have project and i would really appreciate if you help/tell me where i could find these questions, thanks! Please am confused just tell me a ways to do it! 1)Identify three main tasks/ responsibilites of purchasing 2) Identify &explain 5 communication

    asked by Dancer
  50. chemistry

    carbon 85.6% and H 14.4 % is their composition of mass. what is their molecular formula examples below C2H6 C3H4 CH4 C2H4 C3H8

    asked by Doss
  51. Science

    Destiny is using a nutrient solution to use in her garden.She places the powder in a watering can.Then she adds the water.Which would dissolve the powder the fastest? A.SHAKING THE CAN VIGOROUSLY B.STIRRING THE SOLUTION SLOWLY C.TILTING THE CAN CAREFULLY

    asked by Harry please please
  52. Calculus

    Find two positive numbers that satisfy the given requirements. The product is 147 and the sum of the first number plus 3 times the second number is a minimum.

    asked by Luke
  53. physics

    a meterstick pivots freely from one end. if its released from a horizontal position, find its angular velocity when it passes through the vertical. treat the stick as a uniform thin road.

    asked by aleena
  54. geometry

    angle JkL is a right angle. what are m JKM (12x+3) and m MKL (6x-3)

    asked by junior
  55. physics

    One end of a cord is fixed and a small 0.300 kg object is attached to the other end, where it swings in a section of a vertical circle of radius 2.50 m as shown in the figure below. When è = 15.0°, the speed of the object is 6.20 m/s. At this instant,

    asked by carlton
  56. Chemistry

    4.0 L of hydrogen gas reacts with 2.0 L of nitrogen gas (at the same temperature and pressure), producing ammonia gas, NH3. Find the limiting reactant.

    asked by Andres
  57. Algebra-km/h

    Maria bicycles 4km/h faster than Javier. In the same time that it takes Javier to bike 60km, Maria bikes 72km. How fast does each bicyclist travel?

    asked by Kelly
  58. Chemistry

    A certain weak base has a Kb of 8.10 × 10-7. What concentration of this base will produce a pH of 10.00?

    asked by Dana
  59. chemistry

    what is the oxidation number for sulfur in K2S2O8

    asked by TROUBLED
  60. Science: Phsycs

    A baseball player swings his 2 kg bat with a speed of 15 m/s. They hit a 0.142 kg baseball which was approaching at a speed of 40 m/s. the ball rebounds in the other direction at 45 m/s. If the baseball and bat are in contact for 5 ms, what is the average

    asked by Mariah
  61. Algebra 2

    "My husband's age," remarked a lady the other day, "is represented by the figures of my own age reversed. He is my senior, and the difference between our ages is one-eleventh of their sum." 10x + y = husband's age 10y + x = wife's age (10x+y) - (10y+x) =

    asked by Anonymous
  62. Physics

    Consider a stainless steel annular disk with an outer radius 66 mm and inner radius 7.1 mm. The mass of the disk is 1351 grams. Keep your answers to at least 4 significant digits. The stainless steel annular disk is allowed to rotate on a frictionless

    asked by Anonymous
  63. trig

    Find the values of the other five trigonometric functions for angle S. a) cos S=1/3 and the terminal side of angle S is in Q1. b) tan S=-10/7 and the terminal side of S is in Q2. c) sin S=-5/14 and the terminal side of S is in Q3. d) sec S=13/11 and the

    asked by Chelci
  64. chemistry

    write a balanced equation for photosynthesis. express the answer as a chemical equation. identify all of the phases in the answer. during photosynthesis, plants use energy from sunlight to form glucose (C6H12O6(s)) and oxygen from carbon dioxide and water

    asked by jen
  65. psychology

    A team of psychology students would like to expose their classmates to an embarrassing experience in order to gather data for their term project. Their instructor has asked them to read the ethical guidelines published by the American Psychological

    asked by TObby
  66. physics

    A sinusoidal wave on a string is described by the equation y = (0.169 m) sin (0.713 x - 41.9 t), where x and y are in meters and t is in seconds. If the linear mass density of the string is 10.1 g/m ... a) ... the phase of the wave at x = 2.27 cm and t =

    asked by maria
  67. Geometry

    The distance between two docks on opposite sides of a river is 90 meters. The angle formed by the river bank and the line between the docks is 53°. What is the width of the river? Round your answer to the nearest meter and show your work.

    asked by Maria
  68. math

    Determine the values of k for which the function f(x)=4x^2-3x+2kx+1 has two zeros. Check these values in the orginal equation.

    asked by ashvini
  69. Physics

    Batman (mass = m kS) jumps straight down from a bridge into a boat (mass - 510kS) in which a criminal is fleeing. The velocity of the boat is initially + 11 m/s. What is the velocity of the boat after Batman lands in it?

    asked by Anonymous
  70. Chemistry Help!!

    why is it impossible to draw a distinction between natural substances and chemical substances?

    asked by Maci
  71. phms

    Serena paid $20.20 for 36 rulers and folders. She bought 16 more folders than rulers. If each folder cost $0.50 more than each ruler, how much did each folder cost?

    asked by KevinR
  72. calculus

    A rocket is fired into the air, and its height in meters at any given time t can be calculated using the formula h(t) = 1600 + 4.9t^2. Find the maximum height of the rocket and the time at which it occurs.

    asked by Jake
  73. psychology

    Psychologists using information from old newspapers to study human behavior are engaging in: a. developmental research b. archival research c. naturalistic observation d. survey research is it B im confused 2. Kevin and Cheryl had completed their first day

    asked by TObby
  74. Chemistry

    Calculate the sodium ion concentration when 50.0 mL of 2.0 M Na2CO3 is added to 100.0 mL of 3.0 M NaHCO3

    asked by Andres
  75. physics

    A 3.60 kg object is attached to a vertical rod by two strings as in the figure below. The object rotates in a horizontal circle at constant speed 7.15 m/s. (a) Find the tension in the upper string. 139 . Your response is within 10% of the correct value.

    asked by carlton
  76. statistics

    3. At a cafeteria the customers arrive at an average of 0.3 per minute. The probability that a)exactly 2 customers arrive in a 10 minute span b)2 or more customers arrive in a 10 minute span c) one customer arrives in a 5 minute span and one customer

    asked by Anonymous
  77. math

    The rule (x + 2/3, y - 3/4) is applied to a polygon. Find the coordinates of the point on the image that corresponds to each of these points on the original polygon.

    asked by Anonymous
  78. maths

    evaluate without using a calculator, leaving your answer as surds (a)sin105 degrees (b)tan15 degrees (c)cos 75 degrees

    asked by ceasar
  79. chemistry

    what is the coefficient on oxygen in the balanced equation for the following hydrocarbon combustion reacton C7H14 + O2 + CO2 + H2o

    asked by Doss
  80. chemistry

    Pressure cooker is 1.3atm what is the temperature of water that boils

    asked by tay
  81. 4th grade math help

    Explain how the variable B has two different values in the two equations 6 - B = 5 b = 1 B + 5 = 15. B = 10 Thanks!

    asked by Zack
  82. Probability

    Suppose that 3% of the population ha a certain disease. We have a test for the disease. 97% of those who actually have the disease will test positive. 12% of those who do not have the disease will also test positive. What is the probability that a randomly

    asked by Betty
  83. english

    please correct if the sentence into reported speech are right. 1-where do you buy your clothes? she asked me where did i buy my clothes? 2-how long have you been collecting these clothes? she asked me how long have i been collecting those clothes. 3-what

    asked by Emma
  84. physics

    A fighter pilot dives his plane toward the ground at 485 m/s. He pulls out of the dive on a vertical circle. What is the minimum radius of the circle, so that the normal force exerted on the pilot by his seat never exceeds three times his weight?

    asked by jeremy
  85. nath

    explain how you can add two fractions with denominators of 10 and end up with a sum whose denominator is 5.

    asked by debbie
  86. chemistry

    the following titration data were collected: a 10 mL portion of a unknown monoprotic acid solution was titrated with 1.12340 M NaOH and required 23.95 mL of the base solution for neutralization. calculate the molarity of the acid solution calculate the

    asked by Doss
  87. math

    What is the perimeter of a right triangle with legs 6 cm and 3 cm? Leave your answer in simplest radical form.

    asked by ashvini
  88. math

    The rule (x + 2/3, y - 3/4)is applied to a polygon. find the coordinates of the point on the image that corresponds to each of these points on the original polygon.

    asked by Anonymous
  89. possessive noun

    success often depended on the army's food supply

    asked by Anonymous
  90. Math

    The height , in metres, of the trajectory of a football is given by h(t)=2=28t-4.9t^2, where t is the time in height of the football and the time when the height is reached

    asked by Sophie
  91. Chemistry

    Calcium reacts with water according to the chemical equation below: Ca + 2H2O--> Ca(OH)2 + H2 All but which reaction is expected to occur on the basis of the reaction of calcium and water?

    asked by Chelsea
  92. Maths

    It is given a quadratic function y=a(x-h)62+k.If its graph is a parabola with x=2 as its axis of symmetry,and it passes through the two points(3,7)and(4,11) (a)what isthe value of the constant h? (b)find the values of the constants a and k,and write down

    asked by Kon
  93. physics

    A fountain sends water to a height of 149 m. What is the difference between the pressure of the water just before it is released upward and the atmospheric pressure?

    asked by melisa
  94. math

    Find the greatest possible length of a rope which can be used to measure exactly the lengths 7m, 3m 85cm and 12m 95cm.

    asked by Ashley
  95. Physics

    A diver in Acapulco jumps off a 150 ft cliff. His forward motion is 10 feet per second. The base of the cliff at the waters edge extends 38 feet beyound the top edge of the cliff. Will the diver land in the water?

    asked by Clay
  96. Science

    David has to dissolve salt crystals in the water. What would be the best thing to do to help the crystals dissolve quickly? A)heat the salt crystals B)crush the salt crystals C)cool the water in the tank D)use the largest salt crystals

    asked by Sally
  97. math

    You start an investment account with $3000 and save $100 each month. Write a rule to represent the total amount of money you invest in the account as an arithmetic sequence. How much money will you have invested after 12 months?

    asked by Jane
  98. Physical Science

    a 30 kg girl and a 25 kg boy face each other on a friction-free blades. The girl pushes the boy, who moves away at a speed of 1.0 m/s. The girls speed is __________m/s

    asked by Grace
  99. Math

    SIMPLE INTEREST kelsie has an $800 savings bond which she has had for 2 1/2 years. The bond pays simple interest at the rate of 3.8% per year. If kelsie cashes the bond, what amount will she receive?

    asked by Name
  100. physics

    How much work in joules must be done to stop a 5000 kg car traveling at 120 km/hr?

    asked by alex
  101. Social Studies

    Is there a good website for me to find: The Maya's Reason for Decline, The Aztec's Location, Lauguage, Ruler/Type of Goverment, Religion/Beliefs/Society, Achievements, Reason for Decline & The Inca's Location, Lauguage, Ruler/Type of Goverment,

    asked by Laruen
  102. LA/Lit.

    Word withing the word analogies. primate is to primeval as coelenterate is to medieval deliberate is to archival ingrate is to credible migrate is to primal

    asked by Emily
  103. biochemistry

    What is name of reagent containing 0.6 M Sulphuric acid, 28 mM sodium phosphate, and 4 mM ammonium molybdate? and in which amount it should be taken to make a reagent?

    asked by rashu
  104. Science

    A lamp is suspended by a massless string from the ceiling of a descending elevator which decelerates at 1.6 m/s2. If the tension in the string is 82.0 N, what is the mass of the lamp?

    asked by Mark
  105. physics

    Find the minimum diameter of a 51.5-m-long nylon string that will stretch no more than 1.01 cm when a load of 68.9 kg is suspended from its lower end. Assume that Ynylon = 3.51·108 N/m2.

    asked by melisa
  106. Physics

    A 0.59 kg mass is placed at the end of a vertical spring that has a spring constant of 68 N/m and eased down into its equilibrium position. A. Determine the change in the elastic potential energy of the system. B.Determine the system's change in

    asked by Yuki
  107. Math

    An engineer is desingning a parabloic arch, the arch must be 15 m high , and 6 m wide, at a height of 8 m a) determine a quadratic fundtion that satisfies these conditions b) what is the width of the arch at its base

    asked by Sophie
  108. Science

    Reggie has a sample of raw sugar made up of large particles and a sample of white sugar made up of much smaller particles. He dissolved 1 tsp. of each sample in 1 cup of water. Which dissolved fastest? a) Both dissolved at the same rate b) The white sugar

    asked by Regina
  109. english

    In this sentence, what part of speech is the word Teresa's: Teresa's parents have formed a service organization for the community.

    asked by Lori
  110. math

    Determine the break-even points of the profit function P(x)=-2x^2+7x+8, where xis the number of dirt bikes produced, in thousands.

    asked by ashvini
  111. math

    Consider the experiment of simultaneously tossing a fair coin and rolling a fair die. Let X denote the number of heads showing on the coin and Y the number of spots showing on the die. a. List the outcomes in S. b. Find Fx,y(1,2). Part a is easy. It's part

    asked by Jen
  112. Science

    In the reaction X+Y (R) Z, Z is the A)Substrate B)Product C)Enzyme D)Carbon Molecule

    asked by Jake
  113. Math

    Find the domain of the function. Show all work. 1 if -9 < or = x

    asked by Beth
  114. Algebra/Time

    The officejet printer can copy Lisa's dissertation in 22 min. The laserjet printer can copy the same document in 18 min. If the two machines work together, how long would they take to print the document?

    asked by Kelly
  115. calculus

    please help ? deravative of cot^2x-csc^2x ?

    asked by mehak
  116. Physics

    A small aircraft has a flying speed of 200 km/h in still air. To make a trip from Saskatoon to Regina, a straight line distance on the map of 250 km, a pilot must first determine the wind velocity and then calculate what direction to fly (the 'heading') to

    asked by Matt
  117. physics

    A sinusoidal wave on a string is described by the equation y = (0.169 m) sin (0.713 x - 41.9 t), where x and y are in meters and t is in seconds. If the linear mass density of the string is 10.1 g/m .. if needs values of these ( the speed of the wave is

    asked by maria
  118. Chemistry

    A vessel containing 39.5 cm^3 of helium gas at 25°C and 106kPa was inverted and placed in cold ethanol. As the gas contracted, ethanol was forced into the vessel to maintain the same pressure of helium. If this required 7.7cm^3 of ethanol, what was the

    asked by Anonymous
  119. Math

    Joey kicks a football with an initial velocity of 42'/sec at an angle of 35 degrees to the horizon. what is the longest field goal he can make if the crossbar is 10' high?

    asked by Bob Clark
  120. math

    You budget $100 each month for parking. Each day you use the downtown parking lot. It costs $5. Write a rule to represent the amount of money left in the monthly budget as a arithmetic sequence. How much money is left in you budget after you have used the

    asked by Jane
  121. science

    When carbon in the form of diamond is burned to produce CO2, more heat is given off than when carbon in the form of graphite is burned. What form of carbon is more stable under ordinary conditions? What bearing does this conclusion have on the origin of

    asked by Sheryl
  122. physics

    A hollow rubber ball with a diameter of 5.57 cm and a mass of 38.9 g is cut in half to make a boat (in a bathtub) for American pennies made after 1982. The mass and volume of an American penny made after 1982 are 2.5 g and 0.36 cm3. How many pennies can be

    asked by maria
  123. Economics M/C

    Please help: If the rate of separation is 0.02 and the rate of job finding is 0.08 but the current unemployment rate is 0.10, then the current unemployment rate is __ the equilibrium rate, and in the next period it will move __ the equilibrium rate. a)

    asked by Anonymous
  124. math

    In 11 years, the age of Russel will be half of the square of the age he was 13 years ago. Find his present age.

    asked by aldwin
  125. chemistry

    I need to find delta G but I keeo getting 8722.2...I know the formula, can someone help me? ΔH = -19.2 kJ/mol; ΔS = 261 J/mol·K; T = 315 K

    asked by Anonymous
  126. government

    given that a major crisis facing the G20 is the value of the Euro in certain Euro zone countries, what role should the u.s. play? what is U.S. business exposure if the Euro zone collapses?

    asked by mary
  127. math modeling

    Suppose that you invested $1,442 at the annual rate of 4.60% compounded continuously, and your friend invested $885 at the annual rate of 6.35% compounded quarterly. In how quarters will your friends investment exceeds yours?

    asked by math
  128. algebra

    Her average rate traveling uphill was 1.8 kilometers per hour and her average rate down hill was 4.2 kilometers per hour. If she spent a total of 16 hours hiking, how long was the trail?

    asked by Anonymous
  129. chemistry

    whats the oxidation number for all the elements in the following compound BaNaPO4

    asked by TROUBLED
  130. Organic Chemistry

    If a student extracts first with NaOH then with NaHCO3, what will be the result?

    asked by Anonymous
  131. science

    A 30-g iron bar at 100degreeC is placed in 200 g of water at 20degreeC. If the specific heat capacity of iron is 0.11 cal/gdegreeC, to what final temperature will the iron bar cool?

    asked by Debra
  132. Math-Cumulative Frequency

    The score obtained by 100 applicants on an aptitude tests for selection into a program are shown in the frequency table. Score Frequency Cumulative Freq 0-9 8 8 10-19 13 8+13=21 20-29 17 21+17=38 30-39 20 38+20=58 40-49 19 58+19=77 50-59 14 77+14=91 60-69

    asked by Nneka
  133. physics

    Donald Duck and his nephews manage to sink Uncle Scrooge's yacht (m = 4843 kg), which is made of steel (ρ = 7850 kg/m3). In typical comic-book fashion, they decide to raise the yacht (which is now on the bottom of a lake) by filling it with ping-pong

    asked by melisa
  134. MATH 7th GRADE

    Would someone be kind enough to check the answers to these problems? 1. 65.3-14.27 = 51.03 2. 12.35(3.2) = 39.5200 3. 34.364 + 2.5 = 136.864 4. 75.3 divided by 12 = 6.275 5. -16 + 13 = 3 6. 18x (-2) = 72 7. -27 – (-34) = -61

    asked by PLEASE HELP
  135. physics

    In 1976, the Lockhead SR-17A Blackbird set the record speed for any airplane: 3.53x10^3 km/h. suppose you observe this plane ascending at this speed. For 20.0s, it flies at an angloe of 15.0 degrees above the horizontal, then for another 10.0s its angle of

    asked by jack
  136. Math

    Solve the inequality. Show all work 2x^2+5x

    asked by Rick
  137. SOCIAL STUDIES

    Earthquakes struck New Madrid,Missouri during the winter of 1811-1812 and changed the course of what?

    asked by Jason
  138. Math

    Which of the following are linear equations in x1, x2 and x3? (a) x1 + 5x2 − (2^0.5)x3 =1 (b) x1 + 3x2 + x1.x3 = 2 (c) x1 = −7x2 + 3x3 (d) x1^−2 + x2 + 8x3 =5 (e) x1^3/5 − 2x2 + x3 = 4 (f) πx1 − (2^0.5)x2 + 13x3 = 7^1/3

    asked by Matt
  139. Probability

    Consider the experiment of simultaneously tossing a die and a coin. Let X denote the number of heads and Y denote the number of spots showing on the die. a)construct a two-way table for the joint pdf b)Let Z=X+Y . Use the joint pdf to find the distribution

    asked by Jenna
  140. Math

    Find the augmented matrix for each of the following systems of linear equations: (a) 3x1 − 2x2 = −1 4x1 + 5x2 = 3 7x1 + 3x2 = 2 (b) 2x1 + 2x3 =1 3x1 − x2 + 4 x3 = 7 6x1 + x2 − x3 = 0 (c) x1 + 2x2 − x4 + x5 =1 3x2 + x3 − x5 = 2 x3 + 7x4 =1 (d)

    asked by Matt
  141. Math

    Find a system of linear equations corresponding to the following augmented matrices: (a) 2 0 |0 3 −4 |0 0 1 |1 (b) 3 0 −2 |5 7 1 4 |−3 0 −2 1 |7 (c) 7 2 1 −3 |5 1 2 4 0 |1 (d) 1 0 0 0 |7 0 1 0 0 |−2 0 0 1 0 |3 0 0 0 1 |4

    asked by Matt
  142. Algebra

    y+2=10-y, (with a radical root sign over the y+2)

    asked by J@y@
  143. Algebra 2

    Factoring 6p^4-13p^3q^2-28p^3 I have come up with (3p^2 + 4q)(2p^2 -7q^2q

    asked by Taylor
  144. PHI103

    Can anyone show me an example of how to do "modus ponens and "modus tollens". I have to write an argument in symbols using sentence letters and truth functional connectives. I have no clue to grasp the concept.

    asked by MYMADNESS
  145. comm 100

    You would cite the sources in your speech for all of the following except: 1.)if you use nonoriginal visual materials. 2).if you use literal analogies. 3.)if you use direct quotes or paraphrased information. 4.)if you use statistics. I swear I know this

    asked by Michelle
  146. english

    rewrite these sentences into reported speech. 1-where did you get these dress? 2-who did these dress belong to? 3-where do you buy your clothes? 4-how long have you been collecting these clothes? 5-what will you wear at the party? 6-why are you decorating

    asked by julia
  147. geometry

    A(-3;2),B(2;3),C(1;-2),D(-4;-3) show that ABCD is a rhombus

    asked by Anonymous
  148. science

    In the reaction X+Y (R) Z, Z is the A)Substrate B)Product C)Enzyme D)Carbon Molecule

    asked by jon
  149. math

    the larger of two numbers is 1 more than twice the smaller. three times the larger number is 10 more than 5 times the small. find both numbers.

    asked by juve
  150. math

    need help in solving Uninsured Americans In 2005, the fraction of Americans who did not have health insurance coverage was . 39 over 250 Write this fraction as a decimal. (Source: U.S. Census Bureau.)

    asked by tony
  151. english

    correct these sentence. i had to rewrite them into reported speech . are they okay? 1-why are you decorating the house? she asked me why i was decorating the house. 2-what style do you like? she asked me what style did i liked. 3-do you always get what you

    asked by eva
  152. Physics

    A proton, moving in negative y-direction in a magnetic field , experiences a force of magnitude F, acting in the negative x direction. a) What is the direction of the magnetic field producing force? b) Does your answer change if the word proton is replaced

    asked by Jessica
  153. geometry

    The legs of an isosceles triangle measure 2x+ 5 and 3x-1. Find the values of x.

    asked by Sydney
  154. Chemistry

    The Ka of a monoprotic weak acid is 2.04 × 10-3. What is the percent ionization of a 0.181 M solution of this acid?

    asked by Mark
  155. trig

    let P be a point in Q1 such that the slope of the line connecting P to the origin is sq. root of 2 and the distance from P to the origin is 3 units. Find the coordinates of P, state all trig values for angle formed by the line and the positive x-axis, and

    asked by Chelci
  156. calculus

    Find the local max/min values of f using botht the first and second derivatie test. I can do the first but I am having trouble with the second derivative. f(x)= x/(x^2+4) Help please...Thank you.

    asked by linda
  157. science

    Find the mass of 1.6 mol of magnesium, Mg. How many atoms are present in such a sample?

    asked by Sheryl
  158. Physics

    On a banked race track, the smallest circular path on which cars can move has a radius of 112 m, while the largest has a radius of 165 m, as the drawing illustrates. The height of the outer wall is 18 m. Find (a) the smallest and (b) the largest speed at

    asked by Anonymous
  159. Science (8th grade)

    What are some living relatives of cyrtolite retrosus? (a kind of gastropod)

    asked by Samantha
  160. psychology

    A theory can be defined as: a. an attempt to test behavior and thought process b. an accurate description of problem solving behavior c. the basis for relationships among unorganized facts and principles d. the applications of scientific method through

    asked by TObby
  161. Confidentiality in allied health

    The job of a privacy official is to

    asked by Anonymous
  162. Psychology

    Hypothesis Testing A researcher asks whether attending a private high school leads to higher or lower performance on a test of social skills when compared to students attending public schools. A sample of 100 students from a private school produces a mean

    asked by Shawna
  163. physics

    Find the minimum diameter of a 51.5-m-long nylon string that will stretch no more than 1.01 cm when a load of 68.9 kg is suspended from its lower end. Assume that Ynylon = 3.51·108 N/m2.

    asked by maria
  164. Algebra-Rational Equation

    4/vy^2+9/v^2y

    asked by Kelly
  165. drama

    The best in this kind are but shadows" is

    asked by sarah
  166. MATH

    lim x-->0 x^2+3x/x^2-3x x not =0 1 x=0

    asked by Katie
  167. accounting

    O' Hara Company began operations on December 1, 2011. Presented below is selected information related to O' Hara Company at December 31, 2011. Office Equipment ₤ 40,000 Utilities Expense ₤ 6,000 Cash 14,000 Accounts Receivable 27,000 Service Revenue

    asked by Anonymous
  168. psychology

    A school psychologist is asked to help with a third grade student who is disrupting the class and causing the teacher to consider a change in professions. The psychologist interviews the parents, teachers, students, and student. She examines the reports of

    asked by TObby
  169. Rsd

    Describe the different approaches of teaching islam with examples from 10 continents

    asked by Nakalika shamirah
  170. Algebra

    Add. Simplify if possible. 4/vy^2+9/yv^2

    asked by Kelly
  171. psychology

    Message transmission at the end of the axon is dependent upon the functioning of the: a. terminal button. b. myelin sheath. c. dendrite. d. nucleus. is it B The neurobiologist explained to the students, "The neural system is very much like the wires

    asked by TObby
  172. algebra

    Solve the following equation. can you show the steps so I know how to do them? x over x+3 + 2 over 5 = 0

    asked by tracy
  173. PHYSICS HELP PLEASE !!!!!

    A 21 kg object is placed on an incline with friction. The incline is raised slowly from zero degrees and at 60.71 degrees, the object begins to slide down the incline. What is the coefficient of static friction? Be as accurate as possible with your answer

    asked by Amanda
  174. math

    Given the sequence 17, 21, 25,...589 a) Find the 123rd term in this sequence.

    asked by Danielle
  175. Geography

    if it is 1 am at 105 degrees west what time will it be at 23 degrees west

    asked by Dee Dee
  176. PHYSICS HELP PLEASE !!!!!

    A mass of 17 kg lies on a horizontal surface with a coefficient of static friction of 0.54 and a coefficient of kinetic friction of 0.22. If a force, F, is applied parallel to the surface (+x direction if you prefer), what is the magnitude that F needs to

    asked by Amanda
  177. MATH HELP!

    solve equation exactly over interval (0, 2ð) sin(x)= 1-2sin^2(x)

    asked by Luis
  178. PHYSICS PLEASE HELP !!!!!

    A mass of 30 kg lies on a horizontal surface with a coefficient of static friction of 0.72 and a coefficient of kinetic friction of 0.31. If a force of 25.1 Newtons is applied parallel to the surface (+x direction if you prefer), what is the magnitude of

    asked by Amanda
  179. math

    out of 1600 people how many would wear the same shoe size as me?

    asked by dawn
  180. chemistry

    Determine the actual values for the standard change in entropy for the following reaction. NH3(g) + HCl(g) NH4Cl(s) do I use the delta G equation?

    asked by whyyy
  181. Chemistry

    Calcium reacts with water according to the chemical equation below: Ca + 2H2O--> Ca(OH)2 + H2 All but which reaction is expected to occur on the basis of the reaction of calcium and water?

    asked by Chelsea
  182. Algebra/Math

    A group of parents is going to sell specialty coffee drinks including espresso, lattes, cappuccinos and mochas. It cost $250 to rent the equipment, which is a fixed cost. Additionally, the ingredients for each drink (x) cost $0.25. Write an equation that

    asked by Kelly
  183. Chemistry

    Calculate the molarity of Na2C204 solution prepared by dissolving 1.2222 grams of pure Na2C204 in enough water to make 500.00 mL of solution.

    asked by Ashley(please help!!!!)
  184. math

    Trevor buys 12 party favors. He spends the same amount of money on hats as on party favors. He spends twice as much on noisemakers as on party favors. How many hats and noisemakers does he buy? party favors for $0.75 each, hats for $0.45 each, and

    asked by stephanie
  185. English

    Lord of the Flies Questions 3.)What does Piggy believe has happened back home in England? 4.What does Piggy want to do now that they're on the island? 7.What happened when the conch was blown? (p. 17)

    asked by Erin
  186. pysics

    a piston-cylinder device initially contains 0.4m^3 of air at 100KPa and 80 degrees celcius. the air is now compressed to 0.1m^3 in such a way that the temperature inside the cylinder remains constant. determine the workdone by during this process.

    asked by charlotte
  187. business

    Many towns and small cities have websites that they use to interact with their citizens. In 100 words, describe three departments that should be included on the home page of a small towns Web site and describe the citizens interactions that should be

    asked by Josephine
  188. physics

    An astronaut in her space suit has a total mass of m1 = 69.7 kg, including suit and oxygen tank. Her tether line loses its attachment to her spacecraft while she's on a spacewalk. Initially at rest with respect to her spacecraft, she throws her oxygen tank

    asked by Anonymous
  189. physics

    Brookney kicks a soccerball with a speed of 17m/s at 43 degress above the horizon. How far does the ball go before it hits the ground?

    asked by krista
  190. geometry

    A(-3;2),B(2;3),C(1;-2),D(-4;-3) show that ABCD is a rhombus and AC & BD bisect each other

    asked by Anonymous
  191. trig

    Find the values of the other five trigonometric functions for angle S. a) cos S=1/3 and the terminal side of angle S is in Q1. b) tan S=-10/7 and the terminal side of S is in Q2. c) sin S=-5/14 and the terminal side of S is in Q3. d) sec S=13/11 and the

    asked by Chelci
  192. medical billing and coding

    you are a medical office manager who wants to make the cofing process easier for employees to understand. to facilitate better understnading of this process, respond to the following: come up with buzzwords or slogans that would best describe the three CPT

    asked by amanda
  193. English

    I tried to fix the run-on myself. I added a few other sentences I would like you to check. Thank you very much for the help. 1) Sleep is imagined as a bath after heavy work, in which the body has a chance to relax and recover from injury. 2) Sleep is then

    asked by Henry2
  194. physics

    A centrifuge is revolving at the rate 10,000rpm. The radius of revolution for a 0.100-g particle being separated is 8.00 cm. a) Identify the given quantities with their symbols and units. b) What is the angular speed in radians per second? c) What is the

    asked by karen
  195. Canada and the Twenties

    What was the significance of the Old Age pension plan? The significance of the Old Age pension plan was to acknowledge that government had a role to play in providing a network of social services for its citizens. Prior to the 1921 federal election there

    asked by -Mysterious-
  196. physics please helpp

    Find the minimum diameter of a 51.5-m-long nylon string that will stretch no more than 1.01 cm when a load of 68.9 kg is suspended from its lower end. Assume that Ynylon = 3.51·108 N/m2

    asked by melisa
  197. Physics-- urgent

    A block of mass m = 3.20kg slides from rest a distance d down a frictionless incline at angle θ = 30.0° where it runs into a spring of spring constant 425 N/m. When the block momentarily stops, it has compressed the spring by 22.0 cm. (a) What is the

    asked by Anonymous
  198. Chemistry

    If the Ka of a monoprotic weak acid is 9.0 × 10-6, what is the pH of a 0.26 M solution of this acid?

    asked by Sevy
  199. Math

    Which has the largest perimeter, Polygon A or Polygon B? Polygon A is a square (5 cm each side) - Polygon B is 20 sided (1 cm each side).

    asked by Chris
  200. FRENCH

    what do these words in french mean . pleese translate: chez moi une cassette de jazz un boite i did al my other questions but i don't get these

    asked by Ashley
  201. Algebra-Solve

    x/x+3-3/x-3=x^2+9/x^2-9

    asked by Kelly
  202. math ratio

    The ratio of the distances a driver and a 2 iron can propel a golf ball is 5 to 4. If a golfer averages a distance of 200 yards with a 2 iron, how far should she average with a driver. I get 250 yards is that right? 5/4=x/200 is ratio set-up

    asked by nan
  203. English

    Identify and describe Huck’s opinions of “sivilization,” education, and religion.

    asked by Tanya
  204. chemistry

    what is the coefficients on Oxygen in the balanced equation for the following hydrocarbon combusion reaction C7H14 + O2 = CO2 + H2O

    asked by Doss
  205. english

    How does Huck display imagination, intelligence, creativity, and a sense of humor in the first half of Twain’s novel?

    asked by Tanya
  206. English

    Describe the role that Huck’s conscience plays in the first half of Twain’s novel.

    asked by Tanya
  207. English

    Based on what you know about him so far, describe Jim. What kind of a man is he? Why is he the kind of man he is?

    asked by Tanya
  208. Math

    FIND THE DERIVATIVE IF Y= (2X-5)^2 / (X^2+4)^3

    asked by NONO
  209. History-Aristophanes Clouds

    Henderson argues that the purpose of comedy at the festival of Dionysus is to give an outlet for those who disagree with the ideas of the mainstream, the powerful. Does Clouds support this argument or not? In other words, does Clouds "speak truth to

    asked by Jill
  210. Statistics

    How do you solve this? 28!/(28-28)!28! * 0.88^28 *0.12^28-28 I need help on how to solve this on a graphing calculator(TI-83 Plus) Can you help me? Please show step by step instructions! Thank you!!!

    asked by Valerie
  211. Help please! I need to do this before 2:30 am

    Any help at all would be appreciated! Thank you! Henderson argues that the purpose of comedy at the festival of Dionysus is to give an outlet for those who disagree with the ideas of the mainstream, the powerful. Does Clouds support this argument or not?

    asked by Jill
  212. english

    Do you know what this matches and why? Primate:Primeval as Coelenterate:Medieval Deliberate:Archival Ingrate:Credible Migrate:Primal Thank you!

    asked by Allison
  213. Chemistry

    Draw all the possible condensed structural formulas for the organic compounds with 6 carbon atoms that have a 4-carbon chain. [I don't know how to draw condensed structural formulas with a branch on it or how this type of structure is going to come out]

    asked by Steph
  214. 4th grade math

    Please help advise if my answer is correct Is the solution of 25 + n = 30 greater or less than 30? Explain how you know without solving it? By looking at the equation, I know that the value of the n = would be 5. It is not greater or less. It should be

    asked by Zack
  215. physics

    A 3.60 kg object is attached to a vertical rod by two strings as in the figure below. The object rotates in a horizontal circle at constant speed 7.15 m/s. (a) Find the tension in the upper string. 139 . Your response is within 10% of the correct value.

    asked by carlton
  216. university of phoenix

    How might social psychology be influenced by cultural factors from one society to another?

    asked by Anonymous
  217. AP World History

    What were the changes and continuities in African economics, politics, and culture between 600 and 1750??

    asked by Steve
  218. PHYSICS HELP PLEASE !!!!!

    A 21 kg object is placed on an incline with friction. The incline is raised slowly from zero degrees and at 60.71 degrees, the object begins to slide down the incline. What is the coefficient of static friction? Be as accurate as possible with your answer

    asked by Amanda
  219. Maths Derivatives

    If y = x ^ n + ( 1 / x ^ n ) prove that ( x^2y'' ) + ( xy' ) - ( n^2y ) = 0

    asked by Yousef
  220. statistics

    A computer course is conducted for 24 days.Each day 48 persons attended the course.To prepare a day wise work done sheet for all 24 days,find the estimated and the actual number of persons attended the course.Is the estimated value more or less than the

    asked by Maths
  221. Is this right?? Stats....

    Classify the following as discrete or continuous random variables. (A) The time it takes to run a marathon (B) The number of fractions between 1 and 2 (C) A pair of dice is rolled, and the sum to appear on the dice is recorded (D) The length of a broad

    asked by Jennifer
  222. Psychology

    What is a good article in a newspaper from Ontario, Canada that can be relatable in pyschology?

    asked by Rebecca
  223. algebra

    A map has a scale of 1 cm : 11 km. Two cities are 3.4 cm apart on the map. To the nearest tenth of a kilometer, what is the actual distance corresponding to the map distance?

    asked by Anonymous
  224. Geometry

    The distance across a lake is 34 meters. What is the distance, h, between the boat ramp and the dock? Round your answer to the nearest meter and show your work.

    asked by Maria
  225. Math

    For what values of x will the angle be acute? (2x-6)degrees

    asked by Alyssa
  226. Science

    Salim added 1 g of salt to each of four beakers filled with water. He stirred the water at different speeds, and recorded how long it took for the salt to dissolved. Stirring Time (sec) No stirring 25 Slow stirring 18 Medium stirring 10 Fast stirring 6

    asked by Mary
  227. Science

    Imagine you find a piece of wood on the beach. The next day, the wood is 100 meters farther north. How might it have moved? Your answer should refer to currents

    asked by Lars
  228. lol

    please help me in math i don't get it at all so please help meeeeeeeeeeeeeeeeeeeeeeeeeeee!!!!!!!!!!!!math not good

    asked by lol
  229. English

    I tried to rephrase these lines from S's Macbeth, again. Could you please have a look at them and help me with them? 1) Macbeth: "Methought I heard a voice cry, “Sleep no more! Macbeth does murder sleep”—the innocent sleep,Sleep that knits up the

    asked by Henry2
  230. physics

    An open-topped tank completely filled with water has a release valve near its bottom. The valve is 1.63 m below the water surface. Water is released from the valve to power a turbine, which generates electricity. The area of the top of the tank, AT, is a =

    asked by melisa
  231. Math

    Ten rabbits are riding in wagons. Two rabbits sit in each wagon. How many wagons are there? Three jump out of the wagons. How many rabbits are still riding in wagons?

    asked by Dave
  232. English

    Can you please check these last sentences, please? 1) The blood on his hands is on the one hand symbolic of the evil crime he has committed and on the other hand is representative of Macbeth's guilt which cannot be escaped. 2) Nothing can make his hands

    asked by Henry2
  233. biology

    You are conducting an experiment to determine whether lichen populations are affected by local airborne pollutants. Which of the following observations would best support your hypothesis that high levels of airborne pollutants cause a reduction in lichen

    asked by candianon
  234. limericks

    I need help writing a limrick that rhymes with Kaydn

    asked by Anonymous
  235. Math expressions algebra

    How do You write down and expression? Ex. 3*5+2 3*6+2 3*-4+2 3*3+2 3*2+2 3*10+2 Expression: 3a+2

    asked by Someone
  236. MATh(< OR >)

    7>3,2/3(7)? 2/3(3) Is the question mark this 6,9+(-1/3)? 6 divide sign(-1/3) is the question mark <

    asked by FITTY
  237. science

    Destiny is using a nutrient solution to use in her garden.She places the powder in a watering can.Then she adds the water.Which would dissolve the powder the fastest? A.SHAKING THE CAN VIGOROUSLY B.STIRRING THE SOLUTION SLOWLY C.TILTING THE CAN CAREFULLY

    asked by Harry
  238. fractions

    5/11 + 9/12=

    asked by Anonymous
  239. French

    Thank you so much for your help so far Sra! Highly appreciated! This might get confusing! I hope it wont! Key: ' ' - corrections { } - The parts you do not understand ( ) - what i want to say(in english) to replace the parts you do not understand. Hope

    asked by Ruth
  240. Math

    Ive been absent in school, and got my work sent to me. I dot get it, it gives me a table, x and y, and says find the rate of change. HOw do i do that? It also say to explain what the rate of change means in each situation......uhhh what.

    asked by Bryce
  241. Phycics

    Determine the resultant at 21N east and 85N south

    asked by Jake
  242. Discrete Math

    Prove that if a and b are integers with a not equal to zero and x is a real number such that ax^2-bx-b-a=0, then a | b. Note a | b means that a divides b.

    asked by Bobbi
  243. business

    what are the differences among the research approaches that guide the predominant kinds of studies done in operations research, marketing, finance and/or orgaizational behavior

    asked by jan
  244. math

    block A: mass = 100·g, spring stretched 10·cm block B: mass = 400·g, spring stretched 20·cm block C: mass = 200·g, spring stretched 20·cm block D: mass = 200·g, spring stretched 20·cm Rank the blocks, from largest to smallest, based on the

    asked by jen
  245. Chemistry

    24.5 mL of concentrated HCl is diluted to make 455 mL of .256 M solution. What is the molarity of the concentrated HCl?

    asked by DJ
  246. social studies

    Tell your parents why you want to be drug free?

    asked by sandy
  247. Math

    Valerie's cast iron piggy bank strikes the ground at a 30 degrees to the horizontal going 250m/sec. assuming level terrain and no air resistance, from how far away did Valerie throw it?

    asked by Bob Clark
  248. Math

    A pathologist, trying to identify a bacterial infection, places a sample in a growth chamber and measures 1000 bacteria at the end of day 5 of the test. From daily measurements, the growth rate of the number of bacteria is determined to be 5% per day. Note

    asked by Matt
  249. Math

    Rewrite y = 5(10−3x) in the form y = Ae^(mx). (i.e., determine A and m)

    asked by Matt
  250. Math

    Rewrite y = 5(10^(−3x)) in the form y = Ae^(mx). (i.e., determine A and m)

    asked by Matt
  251. Math

    When log s (as ordinate) is plotted against t (as abscissa) on linear paper, the graph is a straight line with slope of -2.1 and intercept of 1.5. Express the relationship between s and t !@#$%^& = Aekt . If s represents a distance in meters and t a time

    asked by Matt
  252. Probability math

    From a deck of 52 cards, 7 are drawn randomly without replacement. Let X and Y be the number of hearts and spades respectively . a) What is P(X > or = Y)?

    asked by Jenna
  253. english

    Cookies and doughnuts were displayed in the bakery window. What is the compuund subject and verb in this sentence?

    asked by zachary
  254. IT

    What steps would you take in diagnosing an application that has been changed from its original state? How does this affect the level of support required to facilitate Microsoft® Access® users?

    asked by Sandra
  255. math

    Suppose the mean height of a population is 65 inches with a standard deviation of 1.5 inches. What is the z value for a height (x) of 67 inches?

    asked by Daniela
  256. uncc

    the half-life of 234U, uranium-234, is 2.52 x 10^5yr. If 98.5% of thee uranium in the original sample is present, what length of time (to the nearest thousand years) has elasped

    asked by ellen
  257. Math

    How do you write down an expression? Ex. 3*5+2 3*6+2 3*8+2 3*-4+2 3*3+2 3*2+2 3*10+2 Expression: 3a+2

    asked by Anonymous
  258. algebra

    ratio 3 to 5 mixed 20 oz?

    asked by ray
  259. English

    What is the verb in this sentence I was dehydrated after my long jog in the park.

    asked by Tasha
  260. Macro-econiics

    If prices are flexible, what occurs when there is a surplus of widgets? If prices are flexible, what occurs if there is a shortage of trinkets?

    asked by Rita
  261. French

    My homework task is to write an introductory email to my french exchange partener about:yourself, how you get on with your family, what your views on marriage are, a descrition of your best friend(s), what you did yesterday and what your plans for the

    asked by Ruth
  262. Algebra

    Show all steps The maximum number of volts, E, that can be placed across a resistor is given by the formula E=sq root(PR), where P is the number of watts of piwer that the resistor can absorb and R is the resistance of the resistor in ohms. Solve this

    asked by Betty
  263. statistics

    if out of 50 people, and 25 only attend what is the percentage

    asked by Anonymous
  264. physics

    A hollow rubber ball with a diameter of 5.57 cm and a mass of 38.9 g is cut in half to make a boat (in a bathtub) for American pennies made after 1982. The mass and volume of an American penny made after 1982 are 2.5 g and 0.36 cm3. How many pennies can be

    asked by linda
  265. PROBLEM SOLVING IN MATHEMATICS

    the number of students in a school doubles every month. if there are 14000 students in the school, how many students were there in the school four months ago?

    asked by alya
  266. Stats

    In testing a new drug, researchers found that 10% of all patients using it will have a mild side effect. A random sample of 14 patients using the drug is selected. Find the probability that: (A) exactly two will have this mild side effect (B) at least

    asked by Jen
  267. Stats

    x y 1 -10.0 2 -20.0 3 -30.0 4 -40.0 5 -50.0 - What would be the slope of this regression line? - Would the correlation between x and y be positive or negative? - How would you interpret these data in terms of linear regression?

    asked by Jen
  268. Stats

    Find the mean and standard deviation of the following probability distribution: x 1 2 3 P(x) 0.3 0.5 0.2

    asked by Jen
  269. Stats....PLZ HELP....

    A bag of colored blocks contains the following assortment of colors: red (18), blue (14), orange (20), purple (14), green (10), and yellow (4). Construct the probability distribution for x.

    asked by Jen
  270. math

    write a fraction between each pair of fractions given...... 1/3 and 1/4 4/7 and 5/7 1/8 and 2/8

    asked by hamza
  271. Macroeconomics

    According to Classical theory, what are the appropriate fiscal and monetary policies during a recession? According the Classical theorists, what should the government do to reduce unemployment?

    asked by Rita
  272. college Chemistry

    molarity of hydrochloric acid=0.5 M-cost of tums package 150 tablets is 9.99 what is the cost of a single tablet

    asked by Nadine Anthony
  273. Canada and the Twenties

    What was the significance of the Old Age pension plan? The significance of the Old Age pension plan was to acknowledge that government had a role to play in providing a network of social services for its citizens. Prior to the 1921 federal election there

    asked by -Mysterious-
  274. calculus

    How do I find the inflection points? f(x)= 2+3x-(x^3) Thank you!!

    asked by linda
  275. science

    Find the mass of 30 mol of sulfuric acid, H2SO4

    asked by Sheryl
  276. IT

    What steps would you take in diagnosing an application that has been changed from its original state? How does this affect the level of support required to facilitate Microsoft® Access® users? I need this for my college paper. Thanks

    asked by Sandra
  277. SS

    Whos is famous for the quote Ask not what your country can do for you, but what you can do for it?

    asked by Ashley
  278. Ancient History

    Hi beautiful people! I'm struggling to find visual sources on Aristophanes 'the Wasps', Cleon and the political system of Athens. I've been trying to find some for more than six hours1 Any help would be much appreciated. I have already used Perseus, the

    asked by Em
  279. Physical science

    If you could produce a sample containing 2,400,000 free neutrons, what would it be 2658 seconds later? A) 300,000 neutrons, 2,100,000 protons, and 2,100,000 electrons. MY ANSWER B) 300,000 neutrons and 2,100,000 protons C) 300,000 neutrons, 2,100,000

    asked by Anonymous
  280. english

    How does the issue of slavery become a concern in Huck's life? How does Huck deal with this controversial issue?

    asked by Tanya
  281. Algebra-Undefined

    Find all numbers for which the rational expression is undefined: -24/25v

    asked by Kelly
  282. social studies

    A waterway they hoped would link the blank Ocean and the blank Ocean. From the Northwest Passage.

    asked by stephanie
  283. Maths

    kelly is 140cm tall, that is just 4 cm short of twice as tall as her sister,how tall is her sister?

    asked by Emma
  284. Science (8th grade) PLEASE HELP DUE TOMORROW!!

    What are some living relatives of cyrtolite retrorsus? (a kind of gastropod)

    asked by Samantha
  285. algebra,math

    which of the following is a solution for the ststem y = 3x + 5 and y = 2x + 5 a. (1, 7) b. (5, 0) c. (2, -1) d. ( 0, 5)

    asked by tracy
  286. nursing

    Because water is an essential requirement for sustaining life, why is local or international water assessment necessary to prevent disease?

    asked by maria
  287. social studies

    A waterway they hoped would link the blank Ocean and the blank Ocean. The waterway is called the Northwest passage.

    asked by stephanie
  288. math

    need step by step on how we get the answer Uninsured Americans In 2005, the fraction of Americans who did not have health insurance coverage was . 39 over 250 Write this fraction as a decimal.(Source: U.S. Census Bureau.)

    asked by tony
  289. French

    My homework task is to write an introductory email to my french exchange partener about:yourself, how you get on with your family, what your views on marriage are, a descrition of your best friend(s), what you did yesterday and what your plans for the

    asked by Ellie
  290. math

    need step by step on how you get the answer Aging in the United States In 2050, about of the population will be aged 65 or over and about 1 over 20 of the population will be aged 85 or over. Estimate the fraction of the population that will be between the

    asked by tony
  291. English

    How do you pronounce this name "Silverstein"?

    asked by rfvv
  292. French

    My homework task is to write an introductory email to my french exchange partener about:yourself, how you get on with your family, what your views on marriage are, a descrition of your best friend(s), what you did yesterday and what your plans for the

    asked by Ellie
  293. Can u plz help me PsyDag?? Stats

    In testing a new drug, researchers found that 10% of all patients using it will have a mild side effect. A random sample of 14 patients using the drug is selected. Find the probability that: (A) exactly two will have this mild side effect (B) at least

    asked by Jennifer
  294. Math

    What is the height of a trapezoid with an area of 60 square meters and bases of 8m and 12 meters?

    asked by Alex
  295. math modeling

    If you invested 5,250 dollars at an annual rate of 6.64% compounded monthly, determine the value of your investment after 11 years and 3 months. Your answer should be accurate to the nearest cent.

    asked by math
  296. social studies

    The Pilgrims hoped to find blank blank in North America.

    asked by stephanie
  297. math modeling

    An investment is made at an annual rate of 9.71% compounded monthly, determine the number of months required for your investment to double.

    asked by math
  298. math modeling

    Determine the annual interest rate r required for an investment with continuous compound interest to yield an effective rate of 9.94%.

    asked by math
  299. math modeling

    At 3a.m., there is a colony of 736 bacteria, and it is growing at a continuous hourly rate of 10.77%. How many bacteria are there at 7p.m.? Round your answer to the nearest whole number of bacteria.

    asked by math
  300. algebra

    use the associative law of addition to write an equivalent expression for (m+np)+r

    asked by Anonymous
  301. Chemistry

    Write the condensed structural formula of 2,2,4-trimethylpentane. I was thinking that this might be the answer: CH_3 C(CH_3)_2 CH_2 CH(CH_3) CH_3 the symbol "_#" represents subscripts but it's not... PLEASE HELP!!!

    asked by Steph
  302. Math

    using the numbers 2.3.4.and 6once to make each equation correct. __+{___x___}x___=30

    asked by Alyssa
  303. literary

    Thank you Sra and really I appreciate you quick response to my essay, still I have enough time. Thank alot

    asked by manal
  304. research

    Can you tell me ANY good topics to research? It's a free project so any topic will do! Thank you!!! -Lizzy

    asked by lizzy
  305. math

    write each mixed number as a fraction. write each fraction as a mixed fraction. 9/2

    asked by stephanie
  306. calculus - please help!

    Find the slope of the tangent line to the curve (3x+3y−27)^(1/2)+(2xy−39)^(1/2)=8 at the point (8,4).

    asked by archi
  307. Science

    Imagine you find a piece of wood on the beach. The next day, the wood is 100 meters farther north. How might it have moved? Your answer should refer to currents

    asked by Jake
  308. curriculum development project

    I need help in a thematic web including an activity plan for the 10 domains. I have sent my homework in three times and I don't know what else to do. Please help a 63 year old.

    asked by Maryann
  309. Statistics

    1. Consider a population with µ=73.6 and 0 = 5.38 (A) Calculate the z-score for x =72.7 from a sample of size 45. (B) Could this z-score be used in calculating probabilities using Table 3 in Appendix B of the text? Why or why not?

    asked by jane
  310. Algebra

    Find all the numbers for which the rational expression is undefined: -24/25v

    asked by Kelly
  311. Math

    Seven standard, six-sided dice are rolled, one after the other. What is the probability that: a) exactly one of them shows a six? c) there is at least one that shows a six?

    asked by Danielle
  312. computer

    diff between actual and formal parameter

    asked by computer
  313. computer science

    Hi what are mutator and accessor methods and what is the difference

    asked by computer scientist
  314. slope math

    Write the equation of a line with the given slope and y-intercept. 1.m=0 b=-3 2.m=-7 b=1/2

    asked by manny
  315. math

    what should you do if your awn is always dry?

    asked by keziah
  316. Can u help me Ms. Sue...Stats

    In testing a new drug, researchers found that 10% of all patients using it will have a mild side effect. A random sample of 14 patients using the drug is selected. Find the probability that: (A) exactly two will have this mild side effect (B) at least

    asked by Jennifer
  317. chemistry

    calculate the mass of sulfur in 6.0 g of Iron (III) sulfate

    asked by payton
  318. Math

    I can't figure out this pattern: 1, 1, 4, 3, 9, 6, 16, 10, 25, 15, __, __, __, __

    asked by Lee
  319. busn 319

    Explain the planning phase and its three steps. Explain the implementation phase and its four components. Explain the evaluation phase.

    asked by larry
  320. Math

    TriangleFGH is an obtuse triangle. The greatest angle in the triangle has a measure of (6d)degrees. What are the possible values of "d"?

    asked by Alyssa
  321. PLZ help!! Stats....

    In testing a new drug, researchers found that 10% of all patients using it will have a mild side effect. A random sample of 14 patients using the drug is selected. Find the probability that: (A) exactly two will have this mild side effect (B) at least

    asked by Jennifer
  322. math

    mario bought 2 packs of invitations for a party. Each pack contains 10 invitations. Mario is inviting 7 classmates, 4 cousins, and 5 children from his neighborhood. What fraction of the invitations will Mario use?

    asked by stephanie
  323. Is this right?? Stats....

    How many green elements are required to make this a legitimate probability distribution if there are a total of 50 elements in this sample? x red blue orange brown green P(x) 0.20 0.16 0.28 0.24 Would it be 0.12??

    asked by Jennifer
  324. English

    Can you please check my sentences? Thank you very much for your invaluable help. Which sentence (2 or 3) paraphrases the concept of sleep? 1) Sleep is imagined as a bath after heavy work, in which the body can relax and recover from injury. 2) Sleep is

    asked by Henry2
  325. Algebra

    Add. Simplify if possible. 4/vy^2+9/yv^2

    asked by Kelly
  326. physics

    an airplane flying at 150 km/hr encouters a headwind of 30 km/hr. draw a vector diagram of this including the resultant.

    asked by Anonymous
  327. Physics, need help only on part one.

    You are using a 5-m-long ladder to paint the exterior of your house. The point of contact between the ladder and the siding of the house is 4 m above the ground. The ladder has a mass of 18.0 kg. You weigh 56.6 kg and stand three-quarters of the way up the

    asked by mymi
  328. math

    how will the side lengths,angle measure,and perimeter of the image compare to those of the original?

    asked by jayda
  329. history

    The Anti-Federalists _____.

    asked by ashley