Questions Asked on
July 22, 2011

  1. Calculus

    I need help setting up the equation. The portion of the graph y = ex between x = 0 and x = ln 3 is rotated around the y axis to form a container. The container is filled with water. Use n = 4 subintervals and midpoints to approximate the work required to

    asked by Kay
  2. Calculus

    A stone is dropped from the edge of a roof, and hits the ground with a velocity of -145 feet per second. How high (in feet) is the roof

    asked by Julie
  3. SQL

    Display a list of all instructors, showing their ID, name, and the number of sections that they have taught. Make sure to show the number of sections as 0 for instructors who have not taught any section. Your query should use an outerjoin, and should not

    asked by joe
  4. math

    a committee of 5 people is to be selected from a group of 6 men and 9 women. If the selection is made randomly, what is the probability that the committee consists of 3 men and 2 women?

    asked by deborah
  5. chemistryB

    How much heat is required to decompose 25.5 grams of NaHCO3? 2NaHCO3(s) + 129 kJ 2Na2CO3(s) + H2O(g) + CO2(g)

    asked by jane doe
  6. statistics

    The weight of 14 healthy newborn children was measured. The sample mean was 7.5 pounds with corresponding standard deviation 1.2 pounds. These babies are from one hospital and we want to test whether the babies born at this hospital are different in weight

    asked by christinaGallas
  7. chem

    an aq. solution(NaCl) made by using 133g diluted to a total solution volume of 1 L.Calculate the molarity, molality & mass % of the solution(density of solution = 1.08g/mL) [ans: M=1.92M, m=2.0m, 10.4 %] i need the calculation work bcus my ans is

    asked by lily
  8. Chem

    Na2CO3 + 2HCl = CO2 + H2O + 2NaCl. What mass of CO2 is produced from the reation of 2.94g Na2CO3 with excess HCI?g

    asked by Terr
  9. physics

    an 8g bullet is shot into a 4kg block, at rest on a frictionless surface. the bullet remains lodged in the block. the block moves into a spring and compresses it 9.40cm. the force constant of the spring is 1000 N/m. a) what is the initial velocity of the

    asked by Anonymous
  10. science

    Assuming that radiation with a wavelength = 15.0 cm is used, that all the energy is converted to heat, and that 4.184 J is needed to raise the temperature of 1.00 g of water by 1.00 degree celcius, how many photons are necessary to raise the temperature of

    asked by Breanna
  11. debating

    Our debating topic is 'That good news is not news.' I am on the negative team so I am saying that good news is, in fact news. I personally believe the good news really isn't news and so I'm struggling to debate for the negative team. I am the first

    asked by Amelia
  12. statistics

    Two dice are rolled and two fair coins are tossed. Let X be the sum of the number of spots that show on the top faces of the dice and the number of coins that land heads up. The expected value of X is _____ .

    asked by mike
  13. Math-probability

    A simple dartboard has three areas… the main board has a radius of 11 inches, there is a circle with a radius of 5 inches, and the bullseye has a radius of 2 inches. What is the probability of a random dart landing inside the bullseye? Round to the

    asked by Jen
  14. Psychology

    Cognitive psychology can best be described as: A) The study of higher mental processes. B) The therapeutic application of critical thinking. C) The area of psychology which attempts to reduce judegmental thinking. D) A subspecialty of psychology based

    asked by Tisha
  15. chemistry

    find the maximum value of h2(g)in grams that would be expected to form by reacting 6.54g of zinc with 50ml of 0.1M of HCl.

    asked by kb
  16. Math grade 12

    the function f(x)= -o.005t^2+0.8t+12 models the relationship between a certain vehicle’s speed and fuel economy, where is the fuel economy in kilometres per litre and x is the speed of the vehicle in kilometres per hour. Determine the rate of change in

    asked by Anonymous
  17. Chemistry

    4 FeS(s) + 7 O2(g) ==> 2 Fe2O3(s) + 4 SO2(g) 7.82 moles of FeS are required to produce 3.91 moles of Fe2O3 What is the maximum number of liters of Fe2O3(s) that can be made from 10.95 L of O2(g) and 18.64 L of FeS(s) at STP?

    asked by Katie
  18. Physics

    Derive a function that gives the final speed of the cart as a function of the masses, ramp angle and distance up the ramp that the cart moves. Use conservation of energy to do this-no kinematics or Newton's Laws. I have 3 trials ,, 3 angles and 3 masses (

    asked by AfterLife
  19. statistics

    The height of 18-year-old men are approximately normally distributed, with mean of 68 inches and a standard deviation of 3 inches. What is the probability that an 18-year-old man selected at random is between 67 and 69 inches tall? Round your answer to the

    asked by kinshassa
  20. math

    whats the answer of 27/7 mixed into a number

    asked by sesy
  21. early childhood

    The use of _______ characterizes the teacher's method of initiating and directing children's verbal responses in a format that can confuse children from non-mainstream cultures. A language modeling B. evencasts c. school language d. language conventions i

    asked by red
  22. Mathematics

    A card is selected at random from an ordinary pack of 52 playing cards.state the probability the card is a club.

    asked by Ray
  23. algebra

    The formula R =−0.0026? + 4.0807 can be used to predict the world record, in minutes, for the 1500-m run t years after 1900. Determine (in terms of an inequality) those years for which the world record will be less than 3.8 min.

    asked by cat
  24. geometry

    write and equation on point sloop form for the perpendicular bisector of the segment with endpoints A(-3,-3) and B(5,6)

    asked by Lydia
  25. chemistry

    A sample of metallic element X, weighing 4.315 g, combines with 0.4810 L of Cl2 gas (at normal pressure and 20.0¢ªC) to form the metal chloride with the formula XCl. If the density of Cl2 gas under these conditions is 2.948 g/L, what is the mass of the

    asked by Hannah
  26. Chemistry

    What mass of water, in grams, would have to be decomposed to produce 25.1 L of molecular oxygen at STP?

    asked by Katie
  27. math

    A car company is offering car loans at simple interest rate of 14%. Find the interest charged to a customer who finances a car loan of $34000 for 2 years

    asked by bobby
  28. algebra

    I am tring to work these out and i have been in this for hours it is not clicking thanks for all the help. the question is: Snookers lumber can convert logs into either lumber or plywood. In a given day, the mill turns out twice as many units of plywood as

    asked by babs
  29. Word Problems

    If your car gets 18 miles per gallon of gasoline, how many pints of gas will you need to take a 698- mile trip? I no that 1pt = 480ml and 1g= 3840 ml so do I x 18 miles per gallon by the amount of pints in a gallon?

    asked by Rina
  30. math

    find the eqt. of tangent to the curve y=-x^2+2x-10.[ans:y=2x-10] but my ans is y=-9. if im wrong could you show the calculation.

    asked by fanny
  31. math

    find the eqt. of tangent to the curve y=-x^2+2x-10 @ the point where the curve cuts the y-axis.[ans:y=2x-10] how do i do this because they didn't give me the point...?

    asked by rob
  32. biology

    (Which of the following would least likely induce thirst) a)Dry pharynx b)Decrease blood volume c)decrease blood pressure d)decreased blood osmolarity

    asked by lol
  33. algebra

    Essay. show all work. A gardener wants to create a triangluar garden in the shape of a right triangle with shortest legth x-3y ft. and the middle length side x+6y ft. What ia an algebraic expression for the area of the garden? be sure to multiply this out

    asked by Rocky
  34. MATH-too confusing :(

    Last fall, a gardener planted 64 iris bulbs. She found that only 56 of the bulbs bloomed in the spring. a.) Find the empirical probability that an iris bulb of this type will bloom. Give answer as a fraction in lowest terms. b.) How many of the bulbs

    asked by Jen
  35. Calculus

    The base is an equilateral triangle each side of which has length 10. The cross sections perpendicular to a given altitude of the triangles are squares. How would you go about determining the volume of the solid described? The textbook answer is

    asked by Chris74
  36. MATH

    The property restoration company PuroServ is considering switching to new dehumidifiers. Their market research, considering the cost of the new machines and their efficiency, tells them that the switch would give them a 54% chance of making a $20,000

    asked by Jen
  37. Biology

    Briefly describe what effect you expect each of the following variables to have on enzymatic activity. 1. pH of 3.0 2. decrease in temperature 3. increase in substrate concentration 4. increase in enzyme concentration 5. addition of phenylthiourea(PTU)

    asked by Jerome
  38. English

    Could you please check these few sentences? Thank you. It's urgent! 1) Though you are not a qualified Spanish teacher, I'll be happy to have conversation classes with you during my stay in Madrid. 2) I hope we can meet around 5 p.m. every day starting from

    asked by Henry2
  39. chem

    A solution prepared by dissolving 20.2 mL of CH3OH in 100mL of water @ 25 celcius. The final volume of the solution is 118 mL. Calculate the % by mass. density CH3OH[0.782g/mL], H20[1g/mL] @ room temp.

    asked by rita
  40. math

    d/dx x(1+y)^(1/2) + y(1+x)^(1/2)=0. Can some1 show me the calculation because i didn't get like the answer. [ans=-1/(1+x)^2 but my calculation=-(sqrt(y+1) (2 sqrt(x+1) sqrt(y+1)+y)/(sqrt(x+1) (2 sqrt(x+1) sqrt(y+1)+x)]

    asked by will
  41. biology

    You are attempting to determine whether a plant-derived processed food sample (for example, a corn chip) contains material from a genetically-modified organism (GMO). First, you crush the sample and attempt to extract DNA from it. Next, you perform PCR

    asked by patricia
  42. algebra

    could someone please help solve by substitution 8x-3y=-88 4x+48=y

    asked by babs
  43. algebra

    A disc jockey must play 14 commercial spots during one hour of radio show.Each commercial is either 30 seconds or 60 seconds long. If the total commercial time during 1 hour is 11 min, how many 30 second commercials were played that hour? How many

    asked by babs
  44. algebra

    Soybean meal is 12% protein; Cornmeal is 6% protein. How many pounds of each should be mixed together in order to get 240lb mixture that is 8% protein?

    asked by babs
  45. statistics

    Two dice are rolled and two fair coins are tossed. Let X be the sum of the number of spots that show on the top faces of the dice and the number of coins that land heads up. The expected value of X is _____ .

    asked by mike
  46. Course CJA/393 - CRIMINAL ORGANIZATIONs

    Define organized crime

    asked by Anonymous
  47. Math - Probability

    what is the probability of getting two sets of 8 digit numbers having 5 digit are the same number and order.

    asked by Tracy
  48. Physics

    A ray of light falls on one of two plane mirrors placed at an angle of 90 degrees. show that the direction of the ray after two reflections is parallel to the direction of the original ray.

    asked by jane
  49. it

    What is the meaning of it and marketing come together.i mean what is the result .why does marketing need it(information technology)?thank you.

    asked by star sorbet
  50. english

    Pretend that you writing to the editor of your local newspaper. Your purpose is to convince its readers that rather than solely relying on e-mail, people should mail a letter to their loved ones every now and then. Following is your first draft. Every now

    asked by Gabe
  51. Math

    Given that the formula is y=-9cos12x+9 What is k in radian?

    asked by Kate
  52. statistics help please

    For a random sample of 10 men, the mean head circumference is x = 57.3 cm and the sample standard deviation is s = 2 cm. The standard error of the sample mean is: a. 0.200 b. 0.447 c. 0.500 d. 0.632

    asked by toyman
  53. Mathematics

    The standard deviation of given population is 4.5 with a mean of 60 and the refit population has a standard deviation of 5.2 with a mean of 75. Calculate the coefficient of variation for both populations and comment on the results.

    asked by Ray
  54. soil

    soil temperature as its varies with dept

    asked by otiotio taofik
  55. math

    find the coordinates of the point where the tangent to the curve y=x^3 +x +2 at the point (1,4) meets the curve again. [ans:-2,-8] pls help me i don't understand the question....

    asked by rita
  56. chemistry

    find the maximum value of h2(g)in grams that would be expected to form by reacting 6.54g of zinc with 50ml of 0.1M of HCl.

    asked by lol
  57. healthcare

    Health Care Costs For Consumers with dietary supplement. I need some basic points and to start my seach on this point. Thank you

    asked by Anonymous
  58. Psychology

    I have to describe the impact of bias on the lives of individuals. I know that bias can distort self-perception and causal attribution. I need help to properly explain this.

    asked by Linda
  59. Math

    If the probability of seeing moose in a day in a certain region of Alaska is 0.37, what is the probability of not seeing any moose in a day there?

    asked by Jen
  60. Math

    If the odds of winning a raffle are 17:214, what is the probability of winning?

    asked by Jen
  61. algebra

    solve by elimination x+6y-12 -x+7y=1

    asked by babs
  62. criminal law

    Describe current parole and mandatory release policies

    asked by D
  63. algebra

    solve by elimination x+6y=12 -x+7y=1

    asked by babs
  64. math

    side of the cube increasing at rate of 6 cm/s. find the rate of increase of the volume when the length of a side is 9 cm.[ans 1458cm^3/s] my answer: ~729x6=4374cm^3/s i need some1 show me the calculation if im wrong.

    asked by susan
  65. math

    in a large survey, it was discovered that 1 out of every 5 adults visits disney world every year. if 30 adults are randomly selected, what is the probability that exactly 7 of them will visit disney world this year.

    asked by deborah
  66. math

    in a certain geometric sequence, the third term is 8 and the sixth term is 125. what is the first term?

    asked by deborah
  67. math

    the distance x cm and y cm are related by the eqt. 1/x+1/y=1/9, if x is increasing at a rate of 8 cm/s, calculate the rate at which y is changing when x=15. [ans:-18]

    asked by mat
  68. Business-

    Explain how these laws intertwine: Title VII of the Civil Rights Acct of 1964, Civil Rights 1991, Opportunity act 1972, Age Discrimination of 1967, Disabilities act, immigration reform and control act of 1986, Fair labor standards act Also explain how the

    asked by Angel
  69. english

    Pretend that you writing to the editor of your local newspaper. Your purpose is to convince its readers that rather than solely relying on e-mail, people should mail a letter to their loved ones every now and then. Following is your first draft. Every now

    asked by Gabe
  70. math

    in a certain geometric sequence, the third term is 8 and the sixth term is 125. what is the first term?

    asked by deborah
  71. biology

    lipid soluble must be oxidized before they are excreted from.otherwise the toxins would not be able to pass through the a)bowman capsule b)red blood cells c)cell membranes d)cytoskeleton

    asked by kb
  72. homework statistics

    Consider a random sample with sample mean x. If the sample size increased from n = 40 to n = 360, then the standard deviation of x will: a. remain the same b. increase by a factor of 9 (will be multiplied by 9) c. decrease by a factor of 9 (will be

    asked by Jackay 70
  73. math

    the tangent yo the curve y=x^2 +5x -2 @ the point (1,4)intersect the normal to the same curve @ the point (-3,-8) at the point P.Find the coordinates of point P.[ans: -1/3,-16/3] just give me some hint to calculate this solution.

    asked by rob
  74. physics

    how to explain the relationship between the mass of the rotating object and its period?

    asked by nanana :D
  75. math

    a motorist drives to a city in 4 hrs. and returns by another route which is 26 mi. longer. on the return trip he traveled 5 miles per hour faster and took 4 hours and 12 min. . find the length of the shorter route.

    asked by mac
  76. math

    reiny, could you give the motorists two trips another try. it appears you can work it . i'd appriciate seeing an answer. thanks.

    asked by mac
  77. Math

    23 college sophomores at Crocodile Community College, 12 preferred pepperoni pizza, 7 preferred supreme, and 4 preferred cheese. If we picked a college sophomore at Crocodile Community College at random, what is the probability that he or she would prefer

    asked by Jen
  78. Math

    Suppose you invest your money into an account that pays 4.0% per year compounded quarterly. How long (in years) will it take for your money to triple? Round your answer to one decimal place. I know I use this... A=P(1+r/n)^nt But to go from there and get

    asked by Tina
  79. MATH, PLEASE HELP!

    Suppose you invest your money into an account that pays 4.0% per year compounded quarterly. How long (in years) will it take for your money to triple? Round your answer to one decimal place. I know I use this... A=P(1+r/n)^nt But to go from there and get

    asked by Tina
  80. Math

    A certain drawing states that the odds of winning are 117:168. What would be the odds against winning? would it be 168/117?

    asked by Jen
  81. Math

    The property restoration company PuroServ is considering switching to new dehumidifiers. Their market research, considering the cost of the new machines and their efficiency, tells them that the switch would give them a 54% chance of making a $20,000

    asked by Jen
  82. Math

    The property restoration company PuroServ is considering switching to new dehumidifiers. Their market research, considering the cost of the new machines and their efficiency, tells them that the switch would give them a 54% chance of making a $20,000

    asked by Jen
  83. Math

    A certain drawing states that the odds of winning are 117:168. What would be the odds against winning? Would it be 168/117??

    asked by Jen
  84. MATH

    The property restoration company PuroServ is considering switching to new dehumidifiers. Their market research, considering the cost of the new machines and their efficiency, tells them that the switch would give them a 54% chance of making a $20,000

    asked by Jen
  85. Math

    Time Height above ground 0 45 3 65 6 80 9 85 12 80 15 65 18 45 21 25 24 10 27 5 30 10 33 25 36 45 I know the following things: The minimum is 5 while the maximum is 85. amplitude: 85-5/2 = 40 period =360/45 = 8 vertical translation = 5 + 40 = 45 But I

    asked by Kate
  86. chemistry

    A sample of metallic element X, weighing 4.315 g, combines with 0.4810 L of Cl2 gas (at normal pressure and 20.0¢ªC) to form the metal chloride with the formula XCl. If the density of Cl2 gas under these conditions is 2.948 g/L, what is the mass of the

    asked by Hannah
  87. Fund. of Electronics

    What is the peak to peak Voltage across a 10 kilo ohm resistor that dissipates 50 mW?

    asked by Brendon
  88. geometry

    if 6, 10, and 12, and 9, and x are the lengths of the coresponding sides of two similair triangles, what is the value of x?

    asked by Lydia
  89. intermediate algebra

    Short answer find the quotient 6x^3-x^2-7x-9 ------------ 2x+3

    asked by mike
  90. math

    x+y=4 x-y=2

    asked by Anonymous
  91. early childhood

    need homework help with this question an example of triadic interaction in mexican-american is evident in the statement: a." name the colors in Maria's dress B. Tell grandpa how much you like your new tricycle c. count all the teddy bears d. Let's have

    asked by red
  92. biology

    (Which of the following would least likely induce thirst) a)Dry pharynx b)Decrease blood volume c)decrease blood pressure d)decreased blood osmolarity

    asked by kb
  93. college

    Advocates of the death penalty recognize that no system is perfect and that applying the death penalty runs a small risk of executing someone who is innocent. Is this a price society should be willing to pay?

    asked by china
  94. soc120

    Advocates of the death penalty recognize that no system is perfect and that applying the death penalty runs a small risk of executing someone who is innocent. Is this a price society should be willing to pay?

    asked by china
  95. chem

    A solution prepared by dissolving 20.2 mL of CH3OH in 100mL of water @ 25 celcius. The final volume of the solution is 118 mL. Calculate the % by mass. density CH3OH[0.782g/mL], H20[1g/mL] @ room temp.

    asked by susan
  96. math

    d/dx x(1+y)^(1/2) + y(1+x)^(1/2)=0. Can some1 show me the calculation because i didn't get like the answer. [ans=-1/(1+x)^2 but my calculation=-(sqrt(y+1) (2 sqrt(x+1) sqrt(y+1)+y)/(sqrt(x+1) (2 sqrt(x+1) sqrt(y+1)+x)]

    asked by jess
  97. biology

    lipid soluble toxins must be oxidized before they are excreted from.otherwise the toxins would not be able to pass through the a)bowman capsule b)red blood cells c)cell membranes d)cytoskeleton

    asked by lovergirl
  98. Math

    A community 5K run will award $50 to the winner. 60 people enter the race, and they each pay an entry fee of $20. Assuming they are all equally likely to win, what is a fair price for the competition? Round to the nearest cent.

    asked by Jen
  99. Law

    why would the "Fleeing Felon Doctrine" be declared unconstitutional?

    asked by Stacy
  100. geometry

    Use the distance formula and the Pythagorean theorem to find the distance, to the neearest tenth, from R(6,-5) to U(-2,6)

    asked by Lydia
  101. economics

    The Money Multiplier (MM) is exemplified. Why do you think the FED evaluates the money multiplier when making decisions with regard to the money supply? What function does the money supply serve in our economy to influence certain economic variables? Why

    asked by Gbrown
  102. careers in early childhood education

    Children's behavior is at once specific and: a.)fragmented b.)integrated c.)inappropriate d.)disjointed

    asked by lachelle mitchell
  103. algebra

    factor out the greatest common factor. Please show all work. 15wx-20wy-25wz

    asked by shir
  104. math

    lily left house at 11.43 am and travelled to town, a distance of 31km. She arrived there at 12.09pm. What was the average speed in km/h and m/s.[ans:71.54 km/h & 19.87 m/s] my answer is ~31/1.1=28.18 km/h ~31000/3960=7.83 m/s can some1 show me the

    asked by susan
  105. math

    find 3/5 of 30

    asked by manny
  106. math

    mr. pursley, have you ever worked geo., trig. etcwith no calu.s with the heat on , when it had to be right?wheather you blew up your target or something else or the bld. collapsed or was built in the correct place? i'm not an answer grazer, but qam an

    asked by mac
  107. algebra

    solve by substitution 2x+6y=30 -9x+y=61

    asked by babs
  108. Business

    Explain how the number of employees in the company affects the company's status if the company is not in compliance. Also explain how federal legislation laws intertwine.

    asked by Angel
  109. english

    can you check to see if i identified the verbs correctly and used the correct tense. 1. For as long as I can remember, education has been a constant factor in my life. ( present progressive) 2. I received my first academic award in elementary school and it

    asked by Ashley
  110. Physics

    A lady looks at herself in a concave makeup mirror whose radius is 80cm.One of her eyes is on the axis of the mirror,16cm in front of the vertex.(a)Find the position and magnification of the image of the eye.(b) Is the image real or virtual?erect or

    asked by jane
  111. Geometry

    Use the distance formula and the Pythagorean theorem to find the distance, to the neearest tenth, from R(6,-5) to U(-2,6)

    asked by Lydia