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Questions Asked on
June 25, 2013

  1. Math

    I have a question my brother asked me but I need a math expert. You have two interlocking circles and the radius of circle B goes through the center of circle A and of course the radius of circle A goes through the center of circle B. The radius of each

    asked by DrBob222

  2. Discreet math

    [(pvq)^(p=>)^(q=>)]=>r[(pvq)^(p=>)^(q=>)]=>r

    asked by James

  3. Maths

    You have seven balls labelled 1,2,…,7 and seven unlabelled, indistinguishable boxes. How many different ways can the balls be placed into the boxes? Can anyone please work the complete solution. I got the answer but it was solved by my brother and he

    asked by Satyam

  4. English

    What is the different between traditional Vietnamese and Vietnamese tradition?

    asked by James

  5. Psychology

    "The role of religion is paradoxical. It makes prejudice and it unmakes prejudice." Do you agree, and, if so, why might this be true?

    asked by jamya

  7. math

    ABC is a triangle with AC=139 and BC=178. Points D and E are the midpoints of BC and AC respectively. Given that AD and BE are perpendicular to each other, what is the length of AB?

    asked by anonymous

  8. physics

    one kg of a diatomic gas is at a pressure of 80000N/meter sqare .the density of the gas is 4kg/meterqubie.what is the energy of the gas due to its thermal motion?

    asked by sagar kumar

  9. math

    express each answer in exponential form using the indicated bases 4x4x4x4,base 2

    asked by joey

  10. Chemistry

    How do I calculate this? How many grams of CaCl2 is in 500 mL 0.1 M solution of CaCl2

    asked by Kate

  11. Chemistry

    A reference solution is to be prepared with 5 PPM parabenzopyrene (molecular weight = 252). The quantity of parabenzopyrene required for preparing one litre 5 PPM solution is (A) 252 mg (B) 25.2 mg (C) 5 mg (D) 252 g

    asked by rohit

  12. CHEMISTRY(URGENT PLEASe)

    CONVERT : 1.67KG =___MG 2.70MM=___KM 3.55 DAYS=___MINS 4.37 FAHRENHEIT=___KELVIN BETTER IF WITH SOLUTIONS PLEASE AND HOW TO DO PLEASE

    asked by Dishea

  13. Mathematics

    If a man and a half finishes a job and a half within a day and a half, how many men can finish 3 jobs within 3 days. Please I need help, I am not so sure with my answer of 6. I would like to verify it. THANKS

    asked by xavier

  14. MIT 2.01X

    We will obtain bending moment diagrams for three beams and calculate stresses inside the beams. For each beam, take the x-axis along the neutral axis of the beam, oriented from left to right, with origin at A. HW7_1A_1 : 5.0 POINTS For the beam above,

    asked by Uncle SAM

  15. Calculus

    Find dy/dx by implicit differentiation for the following 2x^2y+3y=-1

    asked by Emma

  16. Eng

    Which statement is most accurate regarding the speaking-writing connection? A. To own a word, write it over and over again. B. Written words seldom reflect the words people use when they speak. C. To own a word, speak it. D. The words used by writers are

    asked by Jen

  18. Calculus

    Find dy/dx by implicit differentiation: cos(x−y)=−4xe^x

    asked by Emma

  19. Physics

    A small coin is inside a bowl. The bowl is a surface of revolution of the curve y=100x4 m−3. This coin slides around the inside of the bowl at a constant height of y=0.01 m above the bottom of the bowl. What is its angular velocity in rad/s? please just

    asked by K

  20. math

    The corrosive effects of various soils on coated and uncoated steel pipe was tested by using a dependent sampling plan. The data collected are summarized below, where d is the amount of corrosion on the coated portion subtracted from the amount of

    asked by tracy10

  21. Eng

    Which of the following would be an appropriate way to add variety to your sentence? A. Make your sentences read like a spoken conversation. B. Use more close-up words. C. Use questions and answers together. D. Add personal anecdotes. Answer is C

    asked by Jen

  22. math help

    Complete the hypothesis test with alternative hypothesis ƒÊd ‚ 0 based on the paired data that follows and d = O - Y. Use ƒ¿ = 0.01. Assume normality. Oldest 188 174 192 196 65 Youngest 186 168 199 199 69 (a) Find t. (Give your answer correct to

    asked by tracy10

  23. math

    Consider the following bivariate data. Point A B C D E F G H I J x 3 4 2 1 7 2 1 0 4 2 y 1 7 3 3 6 6 5 0 6 2 (a) Construct a scatter diagram of the given bivariate data. (Do this on paper. Your instructor may ask you to turn in this work.) (b) Calculate

    asked by tracy12

  24. math

    Consider the following set of data. (18, 12), (29, 48), (65, 29), (82, 24), (115, 56), (124, 13) (a) Calculate the covariance of the set of data. (Give your answer correct to two decimal places.) Incorrect: Your answer is incorrect. . (b) Calculate the

    asked by tracy12

  25. Physics

    5kg rock is dropped into a well and a splash is heard after 3 seconds , how deep is the well? Ignore air resistance

    asked by Ali

  26. Math

    A vehicle covers 2,160 miles in 5.5 hours. What is the average speed of the vehicle to the nearest tenth. I got 55.5, but I don't think it is correct.

    asked by Matthew

  27. Math

    Tim wants to model a doll house from a real house that measures 60 feet in length by 28 feet in width. He decides to use a scale in which ¼ inch equals 1 foot. Based on this scale, What will be the length of the longer side of Tim's model? inches What

    asked by Matthew

  29. ECONOMICS !!!!! Help me ***

    An article in The Wall Street Journal reported that large hotel chains, such as Marriott, are tending to reduce the number of hotels that they franchise to outside owners and increase the number the chain owns and manages itself. Some chains are requiring

    asked by BBBBBB

  30. Precalculus

    f(x)=x^2-1 Graph the function. Estimate the intervals on which the function is increasing or decreasing, and estimate any relative maxima or minima.

    asked by Lacresha

  31. percentage

    100 employees leave a business that originally has 2000. What is the % of original employees did not leave? Is it 5%

    asked by Anonymous

  32. Miles per Gallon

    If i have a 12 gal gas tank and started with 3/4 tank of gas and drove 90 miles with the air on and was left with 1/4 tank of gas at the end. How many miles did i get per gallon?

    asked by Anonymous

  33. Math

    Tim wants to model a doll house from a real house that measures 60 feet in length by 28 feet in width. He decides to use a scale in which ¼ inch equals 1 foot. Based on this scale, What will be the length of the longer side of Tim's model? inches What

    asked by Matthew

  34. Physics

    Two thin and identical steel rods move with equal speeds v=1 m/s in opposite directions and collide longitudinally. The collision is perfectly elastic and the rods swap their velocities. How long does the collision last in seconds if the length of the rods

    asked by Kay

  35. School

    I need to answer questions about school,(the topic I chose) but I don't get how to list the school options into my answers. It says: For this assignment, research school options available to you. List the top 10 schools from these options based upon your

    asked by Janess

  36. statistics

    The Stop N’ Go convenience chain recently selected a random sample of 10 customers. The store monitored the number of times each customer made a purchase at the store over a two-month period. The following data were collected:

    asked by petrit

  37. Exercice

    The Stop N’ Go convenience chain recently selected a random sample of 10 customers. The store monitored the number of times each customer made a purchase at the store over a two-month period. The following data were collected: 10 19 17 19 12 20 20 15 16

    asked by petrit

  38. statistics

    According to Advertising Age, the average base salary for women working as copywriters is $66,000. Assume that the salaries are normally distributed and that the standard deviation is $7,500. a. What is the probability of a woman receiving a salary between

    asked by petrit

  40. Math

    Irf the temperature is 42 degrees at a.m and it goes up to 68 degrees at noon,how many degrees warmer is it?

    asked by Shreeti

  41. Math check

    Find the critical value for the hypothesis test, given the following. (Give your answer correct to two decimal places.) Ha: ó1 > ó2, with n1 = 8, n2 = 10, and á = 0.025 F = 2.24 I did it this way and it comes up wrong 1-0.025=0.975/2=.4875 looked up on

    asked by Glenn D

  42. Math

    If the temperature is 42 degrees at a.m and it goes up to 68 degrees at noon,how many degrees warmer is it?

    asked by Shreeti

  43. Algebra

    tn = (-1)n(n) A. -1, -2, -3, -4 B. -1, 2, -3, 4 C. 1, ½, 2/3, ¾ D. 1, 2, 3, 4

    asked by Dale

  44. chemistry

    why we use phenolphthalein indicator in the determination of the strenght of NAOH by using standard oxalic acid why not the others indicator?

    asked by sbr

  45. ECONOMICS !!!!! Help me ***

    Fortune magazine reported that SkyWest, an independent regional airline, negotiated a financial arrangement with Delta and United to provide regional jet service for the two major airlines. For its part of the deal, SkyWest agreed to paint its jets the

    asked by BBBBBB

  46. math

    the class is 50 students 30 like chocolate, 25 like vanilla, and 18 like both, which like neither.

    asked by lisa

  47. Government

    The President can choose to get rid of democracy. True or False?

    asked by Olivia

  48. Science

    Many farmers harvest their crops in the fall and then let the leftover plant material stay on the ground over winter. How does this help prevent erosion?

    asked by Pat

  49. FINANCE

    you want to retire in 30 years. You intend to invest $200 per month into a mutual fund that you expect to return 12% per year (1% monthly). If you continue making these monthly investments for 30 years, what amount of money will you have at the end of the

    asked by LILY

  51. math

    Find the value of z that would be used to test the difference between the proportions, given the following. (Use G - H. Give your answer correct to two decimal places.) Sample n x G 386 327 H 414 321

    asked by Glenn D

  52. Physics

    An arrow of mass 1000kg was fired from rest with a velocity of 15m/secs for a period of 0.5secs.calculate the applied force.

    asked by Olajumoke

  53. math check

    Find the 95% confidence interval for the difference between two means based on this information about two samples. Assume independent samples from normal populations. (Use conservative degrees of freedom.) (Give your answers correct to two decimal places.)

    asked by Glenn D

  54. Physics

    William Tell fired an arrow with a velocity of 100 m/s at an angle of 30˚. How long will it take to reach its highest point? Please show work

    asked by Lynn

  55. Chemistry

    Do I solve this by multiplying 1.8645 by 1.14??The equation of your calibration curve from a spectrophotometry experiment was y = 1.8645x. Assuming your calibration curve is set up exactly like it was in lab (concentration in mM on the x axis and

    asked by Ann

  56. Physics

    A motor car of mass 30kg,moving with a velocity of 10m/s. by the application of brakes,it was brought to rest at a distance of 25meters. Find the average force.

    asked by Olajumoke

  57. Please help how do I calculate this

    Calculate the Calorimeter Constant (Ccal) if 25.00 g of water at 51.50°C was added to 25.00 g of water at 25.00 °C with a resulting temperature of 35.00 °C? (*remember the specific heat capacity of water (cwater) = 4.180 J/g°C)

    asked by Mary

  58. math

    any help appreciated on this one, none of us can get it right. Consider the following ANOVA experiments. (Give your answers correct to two decimal places.) (b) Determine the critical region and critical value that are used in the classical approach for

    asked by Glenn D

  59. Leadership-Check #2

    Please check my new copy: I believe the essential qualities a leader must possess are to set a vision and to be able to lead. A leader must be able to set a vision to seek for improvement and change the mistakes. A leader must be able to set a vision for

    asked by Celest

  60. Physics

    A cannon ball whose barrel is angled at 40˚ from the horizontal fires a shell with a muzzle velocity of 350 m/s. What is the horizontal and vertical component of the muzzle velocity and what is the range of the shell?

    asked by Lynn

  62. geometry

    a boy stands 1 meter away from a lamppost. he is 1.8 meters tall and casts a shadow 2 meters long in the light from the lamp. how tall is the lamppost?

    asked by savanna

  63. Math

    Alec, Kate and Ketan are roommates who share living expenses in a ratio of k: 2a: 5k respectively. If their total expenses each month equal $1400, how much is Ketan's monthly contribution? (A) 280/2a+6k (B) 700/2a+6k (C) 1400k/2a+6k (D) 2800a/2a+6k (E)

    asked by Catherine

  64. psychology

    If you conclude that the participant's in a study are a representative sample, then you can from the research sample to the larger population. a. replicate b. speculate c.generalize d.sample e. none of the above

    asked by Taylor B

  65. psychology

    Ethical standards in human research allow researchers to balance interests in acquiring new information with concern about: a. public approval b. Dignity and human welfare c. Making money from experiments d. Applied science e. Getting academic recognition

    asked by Taylor B

  66. statistics

    the mean loss for customers at first state bank (which was not insured) was $150. The standard deviation of the losses was -$125

    asked by daphne

  67. Math help

    Consider the following table and use the formulas that are given for computing the correlation coefficient. (Give your answer correct to two decimal places.) x 1 1 0 0 0 y 7 3 5 6 6 r = n xy − x y n x2 − x 2 n y2 − y 2 (1) r = SS(xy) SS(x) · SS(y)

    asked by Glenn D

  68. Physics

    A cannon ball whose barrel is angled at 40˚ from the horizontal fires a shell with a muzzle velocity of 350 m/s. What is the resultant velocity of the shell when it lands?

    asked by Lynn

  69. algebra

    x^2-15x+36=0

    asked by Anonymous

  70. Chemistry correct calculation check

    Calculate the Calorimeter Constant (Ccal) if 25.00 g of water at 51.50°C was added to 25.00 g of water at 25.00 °C with a resulting temperature of 35.00 °C? (*remember the specific heat capacity of water (cwater) = 4.180 J/g°C) Do I substrate

    asked by Mary

  71. Psychology

    Assume that an individual engages in behaviors that are in conflict with their stated religious beliefs, and they experience dissonance. What impact might this have on their beliefs? What might allow people to productively resolve that dissonance?

    asked by Jay

  73. Math

    limit as x approaches 9 of (8/(sqrt(x)-3)) - (48)(x-9)

    asked by Annie

  74. physics

    a 17 kg sled is being pulled along the horizontal snow covered ground by a horizontal force of 22 N. starting from rest the sled attains a speed of 1.9 m/s in 7.8 m find the coefficient of kinetic fiction between the runners of the sled and the snow.

    asked by Sarah

  75. astonomy

    Assume that earth and mars are perfect spheres with the radii of 6,371km and 3,390 km, respectively. Calculate the surface area of earth. b)calculate surface area of mars

    asked by anthony

  76. math

    calculate the general antiderivative of f(x) = -19x^4 - 15x^3 + (20/x)

    asked by Annie

  77. math

    find the critical points of h(t) = (t^2-4)^(1/3)

    asked by Annie

  78. Leadership-Check #2

    Please check: I believe the essential qualities a leader must possess are to set a vision and to be able to lead. A leader must be able to set a vision to seek for improvement. Seeking for improvement helps make the idea grow better and better. A leader

    asked by Celest

  79. math

    Solve: f(x)=7x^6=1

    asked by Ryan

  80. statistics

    The mean loss for customers at the first State bank (which is not insured) was $150.00 the standard deviation of the losses was -$125.00

    asked by daphne

  81. Calculus

    Find the equation of the tangent line to the curve (piriform) y^2=x^3(4−x) at the point (2,16−−ã). a. Find dy/dx at x=2. dy/dx= b. Write the equation of the tangent line to the curve.

    asked by Tyler

  82. physics

    how to calculate the force exerted by by a man with a mass of 72 kg on the floor of a lift when the lift is accelerating downwards at 0.6 meters per second

    asked by oliver

  84. CHEM

    How many kilojoules are released when 85.0g methanol is burned?

    asked by Kim

  85. Math

    Compute the square footage of carpet needed to cover a room 10' 6" x 12' 3". Area (to the nearest tenth) = square feet. Can you explain the steps on how to solve this problem.

    asked by Matthew

  86. Math

    What is the range of values of the probability of an event?

    asked by Maddie

  87. Calculus

    Find the linear approximation L(x) of ln(x) at the point a = 12.

    asked by Tyler

  88. Math

    V = 4/3r3. A sphere has a radius of 4 inches. Volume (to the nearest tenth) = cubic inches The answer I got was 261.2 but it was wrong.

    asked by sarah

  89. Math

    You are paneling an office that has 2 walls measuring 18' x 8' and 2 walls measuring 9' x 8'. How many sheets of paneling will you need, assuming each panel sheet measures 4' x 8'?

    asked by Matthew

  90. business math

    tony towing borrows of $12,250 at 9.5% interest for 320 days if bank use exact interest method how much interest will the bank collect? Round to nearest cent

    asked by angela

  91. Math

    A cylinder has a radius of 2 feet and a height of 18 feet. Volume (to the nearest tenth) = a0 cubic feet i TRIED to work out this problem. The answer I got was 226.3 I used the cylinder volume formula which is π r2 h.! The computer says my answer is

    asked by sarah

  92. math

    A chocolate cookie recipe that makes 24 cookies uses 3/4 cups of brown sugar. If John wants to make 72 cookies, how much brown sugar does he need?

    asked by davis

  93. Math

    Assuming lambda=0.02 and t=50, compute P(2)

    asked by Maddie

  95. Statistics

    Find the value of z that would be used to test the difference between the proportions, given the following. (Use G - H. Give your answer correct to two decimal places.) Sample n x G 386 327 H 414 321

    asked by Tracy

  96. statistics

    Consider the following ANOVA experiments. (Give your answers correct to two decimal places.) (a) Determine the critical region and critical value that are used in the classical approach for testing the null hypothesis Ho: ì1 = ì2 = ì3 = ì4 = ì5, with

    asked by Tracy

  97. Statistic check

    Find the critical value for the hypothesis test, given the following. (Give your answer correct to two decimal places.) Ha: ó1 > ó2, with n1 = 8, n2 = 10, and á = 0.025 F = 2.24 I did it this way and it comes up wrong 1-0.025=0.975/2=.4875 looked up on

    asked by Glenn D

  98. Statistics check

    Complete the hypothesis test with alternative hypothesis ƒÊd ‚ 0 based on the paired data that follows and d = O - Y. Use ƒ¿ = 0.01. Assume normality. Oldest 188 174 192 196 65 Youngest 186 168 199 199 69 (a) Find t. (Give your answer correct to

    asked by Tracy 10

  99. Chemistry

    How many kilojoules are released when 85.0g methanol is burned?

    asked by SugarBear

  100. Math

    Grace is building a brick wall along her driveway. She estimates that one row of brinks plus mortar will be 2 3/8 inches high. How many rows will she need to construct a wall that is 57 inches high?

    asked by Susie

  101. math

    A market research company surveyed 2500 teenage cell phone owners. The company learned that 4/5 of them use cell phone data services. How many teenagers surveyed use cell phone data services?

    asked by john

  102. Chemistry

    Give three substances with different structures and different chemical composition and explain why they are different from each other. If possible, give the chemical composition or formula of the substances. Thanks.

    asked by Perrie

  103. Math

    If P(F)=0.3, P(E or F) =.65 and P(E and F)=.15, find P(E)

    asked by Amanda

  104. Economics

    Personal consumption expenditures $245 Net foreign factor income 4 Transfer payments 12 Rents 14 Statistical discrepancy 8 Consumption of fixed capital (depreciation) 27 Social Security contributions 20 Interest 13 Proprietors’ income 33 Net Exports 11

    asked by Anonymous

  106. physics

    Suppose the Earth's orbit is divided in two by its minor axis as shown in the figure. How much longer in days does the Earth spend in one half than the other? The eccentricity of an elliptical orbit is defined as e:=a/c where c is the semi-major axis and a

    asked by Kay

  107. college physics

    an atwood machine is constructed by mounting a well-lubricated pulley (not necessarily a ring/disc), whose radius is 6.00cm on an axle and passing a rope over the pulley. Each end of the rope is attached to a different mass of 3.0 kg and 2.0kg so they both

    asked by kim

  108. Chemistry answer check

    What quantity of heat is required to produce 5 mol of oxygen gas by this reaction? HgO(s) → Hg(l) + ½ O2(g), ΔH = +90.7kJ I calculated 90.7*5, but my online homework says its wrong how do I calcuate this?

    asked by Mary

  109. Economics

    Compensation of employees $194.2 US exports of goods and services 17.8 Consumption of fixed capital (depreciation) 11.8 Government purchases 59.4 Taxes on production and imports 14.4 Gross private domestic investment 63.9 Transfer payments 13.9 US imports

    asked by Anonymous

  110. physics

    A woman stands on a scale in a moving elevator. Her mass is 68.0 kg, and the combined mass of the elevator and scale is an additional 713 kg. Starting from rest, the elevator accelerates upward. During the acceleration, the hoisting cable applies a force

    asked by will

  111. Physics

    If a 60.0 kg person slides down an incline angled 25˚ below the horizontal and friction IS present with a coefficient of kinetic friction equal to k = 0.450. What is the person's acceleration as they slide down the slide.

    asked by Renee

  112. financial management

    On a Statement of Revenue and expense I have one year plus the percentage of change and I need to find the projected budget for next year Where can I find how to to do this problems

    asked by Mary

  113. anthropology

    Throughout the 19th century, stereotyping of work by sex had restricted women's employment. (Woloch, 2002). Is this a quote or paraphrasing?

    asked by vanessa

  114. math

    Let A=(0,0), B=(2,4), C=(17,4) and D=(15,0). Then ABCD is a parallelogram. A line through the point (0,−1) divides the parallelogram into two regions of equal area. The slope of this line can be written as a/b where a and b are positive coprime integers.

    asked by anonymous

  115. Math question

    How do you find the p-value, on a problem like below. The corrosive effects of various soils on coated and uncoated steel pipe was tested by using a dependent sampling plan. The data collected are summarized below, where d is the amount of corrosion on the

    asked by Tracy
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