Questions Asked on
August 2, 2011

  1. math

    One pump can empty a pool in 5 days, whereas a second pump can empty the pool in 7 days. How long will it take the two pumps, working together, to empty the pool?

    asked by Lisa
  2. Physics Help NOW!

    A 64 kg woman stands on a very light, rigid board that rests on a bathroom scale at each end. She is 1.5m in on the 2m board. What is the reading on each of the scales in kg? Homework is almost due and I cant figure this out!!!!

    asked by collegechick
  3. Physics

    A baseball is hit with a speed of 27.0 m/s at an angle of 42.0 deg. It lands on the flat roof of a 10.0 m-tall nearby building. If the ball was hit when it was 1.0 m above the ground, what horizontal distance does it travel before it lands on the building?

    asked by Kyle
  4. statistics

    Consider a binomial experiment with 20 trials and probability 0.45 on a single trial. Use the normal distribution to find the probability of exactly 10 successes. Round your answer to the thousandths place.

    asked by lee
  5. Need help now Please!

    A 64 kg woman stands on a very light, rigid board that rests on a bathroom scale at each end. She is 1.5m in on the 2m board. What is the reading on each of the scales in kg? Homework is almost due and I cant figure this out!!!!

    asked by Helppp
  6. statistics

    In a preliminary study, the sample standard deviation for the duration of a particular back pain suffered by patients was 18.0 months. How large a random sample is needed to construct a 90% confidence interval so that an estimate can be made within 2

    asked by joe
  7. physics

    A ceiling fan has four blades, each with a mass of 0.40 kg and a length of 65 cm. Model each blade as a rod connected to the fan axle at one end. When the fan is turned on, it takes 4.45 s for the fan to reach its final angular speed of 2.3 rev/s. What

    asked by Ashley
  8. Math

    A team has been working to convert diesel-powered cars to run just as efficiently on used cooking oil! They want to compare the mileage and speed of their prototype with that of the diesel-powered car. The prototype is 100 meters south of an intersection,

    asked by Anonymous
  9. physics


    asked by AMAN
  10. math

    A pile of 108 identical books has a mass of 30 kg. Find (a)the mass of 150 books and (b)the number of books that has a mass of 20 kg.

    asked by Sally
  11. algebra

    the diagonal of a rectangular room is 13ft long. one wall measures 7ft longer than the adjacent wall. what are the dimensions of the room

    asked by amanda
  12. accounting

    On January 1, 2006, Powell Company purchased a building and machinery that have the following useful lives, salvage value, and costs. Building, 25-year estimated useful life, $4,000,000 cost, $400,000 salvage value Machinery, 10-year estimated useful life,

    asked by Anonymous
  13. Math

    If you deposit $900 semiannually in a bank which pays 6% interest compounded semiannually and make no more deposits after 7 years, what is the balance in the account 8 yrs. later from the last deposit?

    asked by Diane
  14. Science

    Hydrochloric acid and sodium hydroxide are mixed together to form salt and water. During the reaction, the temperature of the solution increases. Which of these best explains why this is considered to be a chemical change? No energy was destroyed. Heat was

    asked by Anonymous
  15. Physics

    You set out to design a car that uses the energy stored in a flywheel consisting of a uniform 103-kg cylinder of radius R that has a maximum angular speed of 450 rev/s. The flywheel must deliver an average of 1.70 MJ of energy for each kilometer of

    asked by Alex
  16. chemistry

    a compound x has a solubility of 79g/100 g h20. when 24 g of x are added to 68 g of water the resulting mixture is homogeneous or heterogenous

    asked by laura
  17. Human Services Administration

    Evaluate each mission statement based on the following: • Beliefs • Mission • Vision • Culture • Goals • Products Show how each one of the mission statements does or does not meet the requirements of a good mission statement. I am not quite

    asked by Crystian
  18. English

    I have to write a speech on a pet peeve. I chose aggressive driving. Here is my introduction for the outline. Think? Aggressive Driving Introduction •How many of you have turned on the news or opened a newspaper to find that another human being was

    asked by lizzie
  19. english

    Can you please tell me if the sentence in quotation marks is the topic sentence? I read paragraph one and paragraph three, I believe that paragraph one was a very effective paragraph. "It touches a few very interesting points about why someone should

    asked by Denise
  20. math

    River Current A boat can travel 36 miles upstream in the same time that it can travel 54 miles downstream. If the speed of the current is 3 miles per hour, find the speed of the boat without a current.

    asked by Adam
  21. intermediate algebra

    Express in terms of i. 2 divided by sqrt.,-36

    asked by ROCKY
  22. verbs

    kris enjoys action movies at the theatre

    asked by jose
  23. statistics

    Would it be unusual for the mean of a sample of 3 to be 115 or more?

    asked by john
  24. english

    Hawaii is one of the most beatiful places on earht. what are the verbs in the sentence

    asked by lily
  25. statistics

    In a study of the relationship between self-concept and achievement, a correlation of 0.75 was found. this indicates that the relationship between these two variables is: a) weak and positive b) strong and postitive c) weak and negative Thank You!

    asked by Anonymous
  26. Marketing

    Which of the following is a DEMOGRAPHIC segmenting dimension?

    asked by Anonymous
  27. statistics

    What would you guess the value of the correlation coefficient to be for the pair of variables: "number of man-hours worked" and "number of units of work completed"? a) approximately 0.9 b) approximately 0.4 c) approximately 0.0 d) approximately -0.4 e)

    asked by Anonymous
  28. math

    Which number is equivalent to -7 1/3 ?

    asked by drea
  29. physics

    a ball falls from a height of 10metre. on rebounding it loses 30% energy. upto what height does the ball go?

    asked by gurpal
  30. math\

    What is thirty−six percent of fifty?

    asked by drea
  31. physics

    An aluminum rod at 18 degrees Celsius has a length of 2.50 meters. At what possible temperatures will it's length change by 1cm?.

    asked by help
  32. intermediate algebra

    Rowing. Abby rows 10km. upstream and 10km. back in a total time of three hours. The speed of the river is 5km./h. Find Abby's speed in still water.

    asked by ROCKY
  33. Statistics

    Please I Need Help With This Question Showing All Steps...Thank You :) The average number of units that the factory workers at Benzo company assemble per week is μ = 45 with a standard deviation of σ = 12. Assume that the distribution of units assembled

    asked by Anonymous
  34. Precalc

    Hello I need help with this question. I know that the formula for angular velocity is w= theta/time. I also know that the answer is 750 rpm. I am just not sure how to get that answer A truck driver travels at 58 miles per hour. The truck tires have a

    asked by Anna
  35. statistics

    The director of an inner-city hospital believes that the average cost per gunshot injury of patients admitted to the hospital’s emergency room is $18,000. A random sample of 9 gunshot injuries had a mean of $17,213 with a standard deviation of $572.

    asked by Anonymous
  36. physics

    The circuit shown in the figure encloses an area of 25 cm2. The magnetic field increases steadily from 0 T to 0.50 T in 0.2 ms. What is the current in the resistor during this time? The circuit has a 9.0 v battery and a 20 ohm resistor

    asked by Elizabeth
  37. Maths

    how would you write the following expressions using numbers, parentheses and other mathematical symbols. 1. Double the sum of twenty-five and eight. 2. The quotient of fifteen and three subtracted from the product of four and nine. 3.The difference between

    asked by Anonymous
  38. Geography

    Following the breakup of the Soviet Union, what are some of the major problems faced by many of the new countries? Many of the new countries didn't know how to become democratic. The people weren't used to having a choice, voting, or political parties.

    asked by Chandler
  39. English

    What is the tone of Tess of the D'urbevilles?

    asked by Max
  40. Statistics

    Verifying Requrements and finding the margin of error Credit rating FICO credit rating scores of a smiple random sample of applicants for credit cards 95% confidence =50,x=677 and is knownd to be 68

    asked by Leticia
  41. world civ

    Can you help me? Compare and contrast the empires of the Americas with those that emerged in Africa between 500 and 1500 AD. Discuss the roles played by geography, religion, trade, and politics developments in shaping societies in these regions.

    asked by Emily
  42. english

    What is the topic sentence in the following paragraph? I believe that paragraph one was a very effective paragraph. It touches a few very interesting points about why someone should create a Living Will. This is especially important to me because of the

    asked by ....
  43. Biochemistry

    calculate Ph occuring when 100ml of 0.10m acid is added to 500ml of 0.08m acetate buffer,pka 4.75,ph 4.5

    asked by Pearl
  44. chemistry

    Calculate the ph for ch3co2h,3% dissociated at a concentration of 0.02 mol dm-3.

    asked by kirsten
  45. Math

    Global Telephone charges 30 dollars for monthly phone service, plus a long distance calling rate of 15 cents per minute. After an hour of long distance calling charges,the rate drops to just 5 cents per minute for additional long distance calls. What will

    asked by Kris
  46. chemistry

    if the k ion in the blood is 195 mg/ml then what is the molarity of blood

    asked by disha
  47. Geometry

    One hundred tiles of a certain size are needed to pave a floor. If a tile, which measures 4 cm less on each side, will be used, 225 tiles will be needed. Find the size of the larger tile.

    asked by Ivyl
  48. statistics

    Consider the average available for all hotel rooms from the previous assignment. Identify the point estimate of the average number of available hotel rooms in this lesson from each sample. Construct and Interpret a 95% confidence level for the true mean

    asked by tom
  49. bio

    what is the structure of DNA?

    asked by amy
  50. physics

    A tennis ball of mass 0.057 kg is served. It strikes the ground with a velocity of 54 m/s (120 mph) at an angle of 21° below the horizontal. Just after the bounce it is moving at 51 m/s at an angle of 19° above the horizontal. If the interaction with the

    asked by Ashley
  51. Science

    Over a one-week period, there is a rapid increase in the number of patients entering the emergency room complaining of high fever, lethargy, muscle aches and diarrhea or vomiting. Which method of scientific inquiry would the doctors use to determine the

    asked by dannytan2
  52. physical science

    nitrogen and hydrogen react to form ammonia as follows N2(g)+3H2(g) -2NH3(g)

    asked by Anonymous
  53. Statistics/probability/maths

    Please I Need Help With This Question Showing All Steps...Thank You :) The average number of units that the factory workers at Benzo company assemble per week is μ = 45 with a standard deviation of σ = 12. Assume that the distribution of units assembled

    asked by evangeline johnny
  54. statistics

    t-test for independent means: n=8 t=-1.33 df= 8 C.V. = plus or minus 2.306 My question is how do you get 2.306 for the cv???

    asked by Hannah
  55. intermediate algebra

    Given the quadraticf(x)=x^2-14x+49, find a value of x such thatf(x)=36

    asked by ROCKY
  56. Physics

    A 850 kg car skidding on an icy highway at 32.5 km/h slides onto some bare pavement. If the coefficient of friction between the tires and the bare pavement is 0.200, what time(s) does it take for the car to stop? HOW do i get the answer!!!!

    asked by Brina

    Write six original sentences in which pronouns are used in a consistent manner. What strategies might a writer use to ensure pronouns are used effectively?

    asked by Camille
  58. geology

    How do oceans regulate climate?

    asked by Sandra

    Which of the following statements is true of the Gulf of Tonkin affair?

    asked by Anonymous
  60. algebra

    3x+4y=12 how to find the slope and y-intercept

    asked by alvin
  61. statistics

    A group of students who are female is greater than 0.5. a sample of 120 students reveals that 76 are females. use the 5% leave of significance to test this claim.

    asked by Riyaz
  62. calculus

    Calculus A, Evaluate the following integral : ç (x^2+3x-2)dx

    asked by Iman
  63. Algebra

    I am stumped by these two LCM questions for some reason. Find The LCM for #1 2(R-7) and 14(R-7) #2 (1+4r), (1-16r^2), and (1-4r) It seems like #1 is already at the LCM and #2 would be (1+4r)(1-4r) Am I even vaguely correct? Thanks for your help.

    asked by Aria
  64. Middle Childhood Psychology

    Definition Gender schema helps the children make sense of their world. A schema for a boy would be “boys play with trucks and are engineers.” A schema for a girl would be girls play with dolls and cannot be scientists.” As children interact with

    asked by Sharon
  65. chemistry

    statement that is wrong about transition elements is 1) they have fixed oxidation states 2) they show paramagnetic behavior 3) they form interstitial compounds 4) they form complexes

    asked by marjani
  66. physics

    Damon, thanks for your answer. Consider that the 20lb object is being pulled behind a bid rig truck traveling at 90mph, can it then be calculated as to what amount of horsepower, is being provided to move (in our case) a 20lb object, traveling at 90mph. If

    asked by david
  67. Maths

    Find the gradient of the line joining the points (5,2) and (6,3)

    asked by Jennifer


    asked by JERRY
  69. math

    Find the quotient: four-ninths divided by eight.

    asked by Anonymous
  70. hum

    One of the key controversies in psychology is nature versus nurture. Is this a problem or an issue?

    asked by Anonymous
  71. Calculus

    Hi! I am having trouble figuring out the derivative of ln[sin^2(x)+3]........... If it weren't for the "3" I know I could just "move" the exponent of 2 from sin^2 to in front of the ln,....but because of the 3 I can't do this....So what should I do? Thank

    asked by KIKI
  72. Math

    An athlete runs 12 laps on a 400m running track every day for 2 weeks. How many kilometers does she run in total?

    asked by Bella
  73. statistics

    The following data is the result of a random sample of the ages (in years) of 12 houses in a community: 18, 22, 23, 19, 18, 24, 26, 17, 12, 27, 28. Construct a 90% confidence interval for the mean age of a house in this community.

    asked by Anonymous
  74. Medical Terminology

    Need help identifying 15 medical terms that would be unfamiliar to non-medical persons. Also providing singular and plural forms of selected medical terms. This is a 47-year-old male who was in his usual state of health until early this evening when he

    asked by Rachel
  75. physics

    X horsepower is equal an 20lb. Object traveling at 90mph. Is it possible to solve for X? and if so, what does X equal?

    asked by david
  76. com155

    If I could get some help on the adverbs and adjectives in the following paragraph I wrote. I personally did not have any credit cards for a very long time. In the past I have had more then I needed and found them to just cause me problems. I was young and

    asked by writing


    asked by JERRY
  78. math

    Gary has a length of string for making a yo-yo that is fifty-seven and one-half inches long. He wants to cut that in half to get the proper length. Which expression can be used to find the length of each piece of string?

    asked by Anonymous


    asked by SHON
  80. world history

    During the fourteenth century, Japanese women of aristocratic rank

    asked by katie
  81. algebra

    Write an equation of the line containing the specified point and parallel to the indicated line.(1,4)3x+y=5

    asked by smith
  82. intermediate algebra

    use polynomial long division to divide 25x^3+40x^2+25x+10 by -5x^2-3x-2

    asked by ROCKY
  83. intermediate algebra

    Express in terms of i. 2sq.rt.divided by-36

    asked by ROCKY
  84. math

    At a flea market, 5 out of twelve vendors are selling antiques. What is the decimal equivalent of 5/12

    asked by anonymous
  85. physics

    An apple of mass 0.1kg is thrown from a 123 meter high building at an angle of 45 degrees with an initial velocity of 5. How long does it take for the apple to hit the ground? (assume g = 9.8 m.s-2)

    asked by JJ
  86. math

    Wildlife officials had to rescue and remove seven hundred thirty−five Florida panthers in the past twelve months. It is estimated that there are fifty thousand Florida panthers in existence. What percent of fifty thousand is seven hundred thirty−five?

    asked by drea
  87. physics

    A space probe of mass M is moving with uniform velocity v far from earth and from other massive bodies,and it is planned to deflect from its trajectory through an angle theta by firing from it a suitable mass at velocity v.Derive an expression for the

    asked by victor2
  88. CIS 105

    Explore one or more graphics programs available on your computer: Share your experience with the class. What did you like and dislike about the program

    asked by Anonymous
  89. Statistics(Please help)

    t-test for independent means: n=8 t=-1.33 df= 8 C.V. = plus or minus 2.306 My question is how do you get 2.306 for the cv??? Why wouldnt the cv be 2.31?

    asked by Hannah
  90. intermediate algebra

    Subtract. (5x^6+9x^4-2x^3-3)-(8x^6-8x^5+x^4-4)

    asked by ROCKY
  91. statistic

    the proportion of students who smoke is less that 0.35. a sample of 55 reveals that 20 smoke. use the 10% level of significance to test this claim.

    asked by Riyaz2
  92. physics

    If the aim is to let a 700 kg pump float on the surface of water, how many cylinders ( 50cm*90cm ) containing (( 2/3 from total volume / cylinder )) fresh water should we have ?

    asked by khikha
  93. math

    What decimal is equivalent to seven and 3 over two hundred fifty?

    asked by drea
  94. Mathematics

    If 1/3 of 2x is 5, what is 2/3 of 4x?

    asked by Kay
  95. Cultural Antrhopology

    How does the identification of cultural universals impact our understanding of what it means to be human?

    asked by Victor
  96. math.

    If x>0 and x=5y, then square root of x^2-2xy+y^2 is..

    asked by John
  97. Chemistry

    A gas at a temperature of 95 degrees C occupies a volume of 159 mL. Assuming constant pressure, determine the volume at 15 degrees C.

    asked by Tina
  98. math

    Meg has a piece of poster board that is two and two-fifths feet wide. She needs to fold it into three equal sections. How wide will each section be?

    asked by Anonymous
  99. Math

    So let me know if I did this one right please!!!!! 8x+6=2x+9 8x-2x+6=2x-2x+9 6x+6=9 6x+6-6=9-6 6x=3 6/2= 3/6=1/2 x=1/2

    asked by Pam
  100. econ

    Suppose that two people, Michelle and James each live alone in an isolated region. They each have the same resources available, and they grow potatoes and raise chickens. If Michelle devotes all her resources to growing potatoes, she can raise 200 pounds

    asked by Anonymous
  101. TQM(total quality management)

    hi can anyone suggest some site that have quizzes on total quality management?i wanna pratice before our exam..thnaks

    asked by ♥ roses
  102. English

    What tools are in a "writing toolbox"?

    asked by Rachel
  103. Communication

    For the following, state the value of the discriminant and then describe the nature of the sloution. -3x^2-8x-19=0

    asked by Tim
  104. chemistry

    an example of a transition element having completely filled d-orbital is zn Ti v Cr

    asked by marjani
  105. algebra

    simplify 12~ 1/4 + 2/5 - 2^3

    asked by Anonymous
  106. 7th grade

    What should I do to practice my math and reading before I start school so I can get my brain in gear and havesome time to know what i'm doing that is new.

    asked by Anonymous
  107. bio

    Describe a situation or experience in which you used (knowingly or not) the scientific method.

    asked by Anonymous
  108. Geology

    Did tilting of the Grand Canyon Super Group occur after deposition of the Tapeats Sandstone.

    asked by Anonymous
  109. science

    To an element x( added,if the ratio of atoms should be 1:10E7,then how many gr of y is required to 100gr of x?

    asked by Komali
  110. math

    on his first exam, he studied for 10 hours and went to tell the mall for 4hours, and got a score of 85. how long should he study to get a grade of 96 and go to the mall for 17 hours? grade varies directly with studying and inversely with going to the mall.

    asked by rock
  111. 5th grade math

    I need to name ten ways I can use number?

    asked by kyle
  112. Maths

    a pack of blank recordable CD's has a mass of 0.8kg. The packaging has a mass of 80g. what is the mass of one CD? Is it 17.6g

    asked by Anonymous
  113. math

    How do I solve 7x=3x+48

    asked by Pam
  114. math

    what is 14 inch circumfrence rope diametre equals to

    asked by hanan
  115. Working With Decimals

    Compare decimal notation to fractional notation. Which is easier to work with, in your opinion?

    asked by Fiso
  116. ethics

    managerial ethics in islam

    asked by siraju
  117. maths

    lim tan 5x/4x as x approaches to pi

    asked by rohan
  118. Math

    If 10=0.1 what does 28 equal?

    asked by David
  119. Maths

    Increase 500m2 by 25%

    asked by Anonymous
  120. Algebra

    -10 -4 ___ y= ___ they are fractions 13 3

    asked by Cindy
  121. math

    what is negative three point two as a mixed number in simplest form.

    asked by drea
  122. math

    how can you make this a non- function.f(x){(1,-8),(3,-4),(5,0),(9,4),(10,-2)

    asked by tamika
  123. math

    I am trying to simplify these ratios: $2 : 50c 1.2m : 80cm

    asked by Bella
  124. Math

    11x + 28 = 6x + 43

    asked by Pam
  125. Math

    8x + 6 = 2x + 9

    asked by Pam
  126. math

    4 2/3 divide by 1 1/6 =

    asked by Anonymous