Questions Asked on
July 27, 2011

  1. Physics

    An object 0.600 cm tall is placed 16.5 cm to the left of the vertex of a concave mirror having a radius of curvature of 22.0 cm. (a) Draw a principle-ray diagram showing the formation of the image. (b) Calculate the position, size, orientation (erect or

    asked by Chloe
  2. physics

    Consider a boy standing on a building that is 500m height and another boy standing on the ground. If the boy on the ground throws a ball to the boy standing on the building, with what vertical velocity must the ball be thrown such that it reaches the boy

    asked by divya
  3. Physics

    A 400.0-m-wide river flows from west to east at 30.0 m/min. Your boat moves at 100.0 m/min relative to the water no matter which direction you point it. To cross this river, you start from a dock at point A on the south bank. There is a boat landing

    asked by Kyle
  4. physics

    one electron travels twice as fast as another. Which has the longer wavelength?

    asked by Anonymous
  5. Physics

    A speedboat, starting from rest, moves along a straight line away from the dock. The boat has a constant acceleration of +3.00 m/s2. A siren on the dock is producing a 755 Hz tone. Assuming that the air temperature is 20.0oC, what is the frequency of the

    asked by Chloe
  6. physics

    A 3.0-m-long rigid beam with a mass 130 kg is supported at each end. An 90 kg student stands 2.0 m from support 1. (beam 1 is to the left, and beam 2 is on the right.) How much upward force does support 1 exert on the beam? How much upward force does

    asked by falcon306
  7. Statistics

    If mean of 1, 2, 3, --------- n is 6n/11, then n is

    asked by Sharon
  8. Chemistry

    What type of isomers are [Pt(NH3)2Br2]Cl2 and [Pt(NH3)2BrCl]BrCl? A. Structural B. Geometric C. Linkage D. Coordination E. Optical

    asked by Neha
  9. Life Orientation

    In 10-15 lines critically discuss 5 ways in which the Xenophobia impacts on the community.

    asked by Zanele Maleka
  10. Math

    The formula h=48t-16t^2 gives the height, h, in feet, of an object projected into the air after t seconds. If an object is propelled upward, at what time(s) will it reach a height of 32 feet above the ground?

    asked by Robert
  11. Statistics

    The Computer Anxiety Rating Scale (CARS) measures an individual's level of computer anxiety, on a scale from 20 ( no anxiety) to 100 (highest level of anxiety). Researchers at Miami University administered CARS to 172 business students. One of the

    asked by Marge
  12. Physics

    A uniform crate with a mass of 16.2 kg rests on a floor with a coefficient of static friction equal to 0.571. The crate is a uniform cube with sides 1.21 m in length. what is the minimum height where the force F can be applied so that the crate begins to

    asked by AfterLife
  13. math

    A rectangular poster has an area of 190in(squared). The height of the poster is 1in. less than twice its width. Find the dimensions of the poster.

    asked by Anonymous
  14. Math

    Jane has only $1 and $5 in her wallet, and they total $79.00. If she has a total of 23 bills, how many of each bill does she have?

    asked by Mark
  15. Math

    A boat, which moves at 18 mph in still water, travels 14 miles downstream in the same amount of time it takes to travel 10 miles upstream. Find the speed of the current.

    asked by Antione
  16. Math

    Tickets to a game are $5 for adults and $2 for children. Six hundred tickets are sold for a total of $2160. How many adult tickets and how many children's tickets have been sold?

    asked by Will
  17. MATH

    A parking lot has 5 spots remaining and 5 different cars in line waiting to be parked. If one of the cars is too big to fit in the two outermost spots, in how many different ways can the five cars be arranged?

    asked by Jennifer
  18. maths

    how to solve cos70/sin20+cos57cosec33-2cos60?

    asked by Anonymous
  19. Finance

    Dr. Whitten has decided to purchase equipment that has a cost of $60,000 and will produce a pretax net cash inflow of $30,000 per year over its estimated useful life of six years. The equipment will have no salvage value and will be depreciated by the

    asked by Juliette
  20. physics

    assume that a hailstone at 0 degrees celsius falls through air at a uniform temperature of 0 degrees celsius and lands on a sidewalk also at this temperature. from what initial height must the stone fall in order to entirely melt upon impact?

    asked by ann
  21. chemistry

    nonane has a density of 0.79 g/mL and boils at 151 celsius. will it float or sink in water (density of 1.00 g/mL)

    asked by melissa
  22. physics

    describe the force board experiment to show how to obtain the resultant of two non-parallel coplanar force acting at a point.four forces of magnitude 10N, 5N, 4N, AND 6N acts on an oblect in the direction north. West, east and south respectively.find the

    asked by jude
  23. math

    a liquid form of penicillin is sold in bulk at a price of $ 200 per unit.If the total cost for x unit is C(x)=500000+80x+0.003X^2 and the production capacity is at most 30000 at a specified timed, how many of the penicillin must be manufactured and sold in

    asked by Yuni
  24. differential calculus

    a right circular cylinder has a fixed height of 6 units. Find the ratio of change of its volume(v) with respect to the radius(r) of its base.

    asked by wen
  25. Math

    Each of the numbers 0 through 26 is written on a piece of paper and all of the pieces of paper are placed in a hat. One number is selected at random. Determine the probability that the number selected is even. Note: 0 is considered an even number. I think

    asked by Jen
  26. physics

    A spring exerts a 17 N force after being stretched by 3.0 cm from its equilibrium length. By how much will the spring force increase if the spring is stretched from 5.0 cm away from equilibrium to 6.0 rm cm from equilibrium? I don't know how to approach

    asked by falcon306
  27. algebra

    An artifact was found and tested for its carbon-14 content. If 79% of the original carbon-14 was still present, what is its probable age (to the nearest 100 years)? Use that carbon-14 has a half-life of 5,730 years.

    asked by can some please help me with this one
  28. Math

    Suppose an individual makes an initial investment of $2400 in an account that earns 8%, compounded monthly, and makes additional contributions of $100 at the end of each month for a period of 12 years. After these 12 years, this individual wants to make

    asked by Anonymous
  29. Physics

    Babe Ruth steps to the plate and casually points to left center field to indicate the location of his next home run. The mighty Babe holds his bat across his shoulder, with one hand holding the small end of the bat. The bat is horizontal, and the distance

    asked by AfterLife
  30. Statistics

    Determine the upper-tail critical values of F in each of the following two-tail tests: Á) á= 0.10, n1 = 16,n2 = 21 B) á = 0.05, n1= 16,n2 = 21 C) á= 0.01, n1 = 16,n2 = 21

    asked by Marge
  31. business studies

    katleho has a flair for languages and obtains good grades in these. She is an avid reader and spends a large portion of her allowance on magazines. She is a member of the school's debating team. She loves working with people and socialising with her peers,

    asked by anonymous
  32. differential calculus

    a right circular cylinder has a fixed height of 6 units. Find the ratio of change of its volume(v) with respect to the radius(r) of its base.

    asked by wen
  33. Physics-Need Help fast!

    Part 1 A 3m long pipe is in a room where the temperature is 20 degrees C. What is the frequency of the first harmonic if the pipe is closed at one end? Part 2 sound traveling in air at 23 degrees C enters a cold front where the air temp is 2 degrees C. If

    asked by Megan
  34. Economics

    Annual demand and supply for the Entronics company is given by: QD = 5,000 + 0.5 I + 0.2 A - 100P, and QS = -5000 + 100P where Q is the quantity per year, P is price, I is income per household, and A is advertising expenditure. a. If A = $10,000 and I =

    asked by Michelle Lawson
  35. Writing

    My sister had asked me for some money to help get her out of debt. I did not feel right just giving her the money. My sister gathered all of her (possessive pronoun) credit card bills, and we sat down together to look over them. We found out that she

    asked by Anonymous
  36. Statistics

    The algebraic sum of the derivations of a frequency distribution from its mean is i) Always positive ii) Always negative iii) Zero iv) A non zero number

    asked by Sharon
  37. Physics

    An object, that is 3.25 mm high is placed 16 cm in front of a lens. The image produced by this lens appears 6.0 cm behind the object, as the figure shows. (a) What is the focal length of this lens and what type of lens is it? (b) What is the height of the

    asked by Chloe
  38. Math-confused!

    A disc jockey has 12 songs to play. Seven are slow songs, and five are fast songs. Each song is to be played only once. In how many ways can the disc jockey play the 12 songs if: *The songs can be played in any order. *The first song must be a slow song

    asked by Jen
  39. PreCalc - Sequence

    A ball is dropped from a height of 20 ft and always rebounds 1/4 of the distance fallen. A. write a sequence for the first 3 rebound heights B. How high is the 6th rebound? C. Find the sum of all possible rebounds. I keep getting numbers that are too high.

    asked by Joe
  40. Math/116

    I need some help with my math lab week 7

    asked by Dodie
  41. English

    I have made the changes. Is this better? Thesis- The sloppily dressed, wealthy businessman, who now has the state-of-the-art mansion, but because of his penny pinching ways, no one would ever know it. Paragraph #2 Granted Oliver Toliver wasn’t a very

    asked by lizzie
  42. Math

    How much of 20% alcohol solution and 50% alcohol solution must be mixted to get 9 liters of 30% alcohol solution?

    asked by BoB
  43. Math

    A certain mass is supported by a spring so that it is at rest 0.5 m above a table top. The lowest position of the mass is 0.1 m, and the highest position is 0.9 m. The mass is pulled down 0.4 m at time =0, creating a periodic up and down motion. It takes

    asked by hhfo
  44. SCIENCE

    a traffic light is supported by a cable that makes ang angle of 7 degree w/ the horizontal on each side of weight. what is the maximum safe weight of the light if the maximum safe tension in the cable 1200N

    asked by fei
  45. Chem 101

    How many calories are required to raise the temperature of 24.4 g of water by 27.8°C

    asked by lucy
  46. chemistry

    If 50.0 grams of copper metal is added to a silver nitrate solution, what mass of silver is produced if copper 2 nitrate is also formed?

    asked by yadira
  47. Math

    Describe in your own words how to solve a linear equation or inequality

    asked by Raul
  48. economics

    A village has n fishermen who exploit the sea nearby and sell their catch at market price (assumed constant). The extraction technology displays decreasing returns to scale and is a=e^-1/2 where e is the total effort. 1) What is the optimal behavior for

    asked by jalal
  49. Economics

    Unable to find any info to answer my question I recently posted about.. role of economic theory in the way economics are run today & no clue found as to concrete examples of same...went through all your sites you suggested and looked many, many sites

    asked by Joanne
  50. Math

    Use the information provided to write the vertex form equation of each parabola. a)y + 60x + 294 = -3x^2 b)−(y+1) = (x−4)^2

    asked by Kate
  51. Math-Please help :(

    Consider the Venn diagram below. The numbers in the regions of the circle indicate the number of items that belong to that region. (2 intersecting circles A & B, where A part is 50, B part is 110, and the intersecting part is 40) Determine: n(A) n(B) P(A)

    asked by Jen
  52. Math

    The length of a rectangle is 6 inches less than 3 times its width. Find the dimensions of the rectangle if its area is 45 square inches.

    asked by Katie
  53. economics

    What are some ways that the lack of development in the world affects us?

    asked by Emily
  54. physics

    What is meant by the term uniform electric field?

    asked by Andy
  55. Statistics

    The mean and median of 100 items are 50 and 52 respectively. The value of the largest item is 100. It was later found that it is 110, not 100. The true mean and median are a) 50.1, 52 b) 50, 52 c) 50.2, 52 d) None of these

    asked by Sharon
  56. Math modeling

    Write the formula for an exponential function with initial value 24 and growth factor 1.4

    asked by Shondrae
  57. Physics

    Hi, I need to know how much ground water presuure would be required to lift a 1.200m diameter plastic tank weighing 650kg out of the ground please, Please supply the answer in Kpa or psi Cheers

    asked by Spencer
  58. maths

    The perimeter of a farm in a shape of a square is 3,5km what is the length of 1 side the farm ?show all calculations

    asked by Cindy
  59. math

    How do you find the nth term in a sequence of numbers if the values are increasing then decreasing? Ex. 1: -2, 3: 10, 5: -18

    asked by Shay
  60. finance

    rRF = 5.0%; MRP = 5.0%; and b = 1.1. Based on the CAPM approach, what is the cost of equity from retained earnings?

    asked by Anonymous
  61. math

    M4 Rules of Differentiation Exercise Set 3.1 (4, 10, 26, 60) Exercise Set 3.2 (18, 36, 42, 48, 66) Exercise Set 3.3 (12, 26, 38, 50) Exercise Set 3.4 (6, 10, 22, 52, 82) Exercise Set 3.5 (8, 28, 54)

    asked by kofi
  62. HUMA 215

    Sayre posits that the vocabulary associated with romantic love, as it is known today, came into being during the Medieval Period. The troubadour or trobairitz, accompanied by lyre or lute, would recite poems about the feelings associated with this type of

    asked by Meeeee
  63. geometry

    Write a two column proof. Given CE = CA, EB and AD are medians, Prove: EB = AD for a triangle

    asked by tiffany
  64. Maths

    find the profit if a student sell 30 shirts and 50 caps

    asked by Raka
  65. Math

    I need to figure out if 57 people took a survey and 3 of them scored a (3), 31 of them scored a (4) and 23 of them scored a (5), what was the average score and how did you figure that out?

    asked by KIm
  66. Earth Science

    In what ways can sea level be lowered? What effect might this have on existing life forms? I can't find it in my textbook. Can somebody helps??????? THANKS A LOT!!!!!

    asked by Cynthia
  67. statistics

    suppose we selected a random sample of five woman from our school measure the height of each and calculated the sample mean if we wished to know whether the height of woman at our school is typical of height of women inourtown how should we compare our

    asked by rhonda
  68. algebra

    The half-life of 234U, uranium-234, is 2.52 multiplied by 105 yr. If 98.8% of the uranium in the original sample is present, what length of time (to the nearest thousand years) has elapsed?

    asked by Anonymous
  69. Business

    What types of technology do people utilize to communicate? How does technology change the way people communicate? What does technology bring to communication other than the technology itself?

    asked by Robert
  70. engllish

    Even after achieving such wealth, Oliver has always remained true to himself and never allowed his beliefs to waver. Correct?

    asked by lizzie
  71. Algebra

    if p-28=10/3(h-5) how in the world do I figure out how many pounds of oranges a 18ft & 20 ft tree would make. I can get this far and just can catch onto the rest. Please help!

    asked by Tammy
  72. Chemistry

    For each compound, draw a line structural diagram of all isomers. Identify the kind(s) of isomers illustrated. A. CH3CH=CHCH3 B. C3H7OH C. CHIFCl

    asked by Neha
  73. Statistics

    Assume that a population is normally distributed with a mean of 100 and a standard deviation of 15. Would it be unusual for the mean of a sample of 3 to be 115 or more? Why or why not?

    asked by Tamara Wright
  74. MATH

    Consider the Venn diagram below. The numbers in the regions of the circle indicate the number of items that belong to that region. (2 intersecting circles A & B, where A part is 50, B part is 110, and the intersecting part is 40) Determine: n(A) n(B) P(A)

    asked by Jen
  75. math

    help solve x + 1/6= 1/3 thanks

    asked by joe
  76. Psychology

    The testing company has hired qualified peopl in the field to administer thenew test bank to subjects of different ages and ethnic backgrounds. They need a sizable number of scores from inner city, urban and country/small town subjects. Their goal is to

    asked by Nicci
  77. maths

    The perimeter of a farm in a shape nf a square what is the length of 1 side the farm ?show all calculations

    asked by Cindy
  78. math

    find the lateral surface of the frustum of a cone 6inches high with upper and lower bases 11inches and 7inches in diameter respectively

    asked by res
  79. science

    why potassium stock with 10000mg/L is added to the sodium standard solution with 20mg/L during the preparation for aas?

    asked by saymyname
  80. physics

    in what specific way does light from distant stars and galaxies tell astronomers that atoms throughout the universe have the same properties as those on earth?

    asked by Anonymous
  81. Maths literacy,business,acounting,economics

    A clear explanation of the consequences of this human factor

    asked by Melusi
  82. law

    Choose a current federal, state, or local issue that directly affects public policy pertaining to the criminal justice system. Prepare a 700- to 1,050-word paper in which you analyze the issue and related policy. Be sure to address to following points in

    asked by kofi
  83. english

    Please explain the line, "Be prompt without being stubborn,refuse without arguments,clothe weighty matters in a motley garb."

    asked by Richie
  84. Math

    Mary purchased a package of 13 different plants, but she only needed 9 plants for planting. In how many ways can she select the 9 plants from the package to be planted?

    asked by Jen
  85. Psychology

    If the concept is a truck, the prototype may be: a) a Ford pickup b) bulldozer c) an eighteen-wheeler d) personnel carrier I think c

    asked by Nicci
  86. Psychology

    If the prototype is block or ball, the concept is: a) construction b) toy c) child d) play I think b

    asked by Nicci
  87. algebra

    The half-life of 234U, uranium-234, is 2.52 multiplied by 105 yr. If 98.8% of the uranium in the original sample is present, what length of time (to the nearest thousand years) has elapsed?

    asked by Anonymous
  88. Spanish

    Help please, are all my answers correct? Distingue entre todos los usos con se en las oraciones a continuación. 1) Allí es donde _______ coches/carros/autos de Europa. Vamos mañana para buscar uno para comprar. A) fueron vendidos B) se venden C) se me

    asked by Polly
  89. differential calculus

    Find how fast (a) the circumference (b)the area, if a cicle increases when the radius increases.

    asked by wen
  90. STATISTICS (2 Questions)

    Show all work. Any answer given with just an answer will be counted wrong. Also, Show the graph and shaded region as needed or it will be counted wrong. Make sure to answer the question using the steps of hypothesis testing. a.) state the hypothesis, b.)

    asked by Courtland White
  91. algebra

    The half-life of 234U, uranium-234, is 2.52 multiplied by 105 yr. If 98.6% of the uranium in the original sample is present, what length of time (to the nearest thousand years) has elapsed?

    asked by Anonymous
  92. Physics

    On a warm day (92°F), an air filled

    asked by Anonymous
  93. economics

    Should development around the world be a higher priority to the rich countries?

    asked by Emily
  94. Physics

    On a warm day (92°F), an air filled

    asked by Anonymous
  95. Math

    Consider the Venn diagram below. The numbers in the regions of the circle indicate the number of items that belong to that region. (2 intersecting circles A & B, where A part is 50, B part is 110, and the intersecting part is 40) Determine: n(A) n(B) P(A)

    asked by Jen
  96. Globalization

    What are the main questions that the Commanding Heights series is posing about globalization and economics and how does it fit into the concept of development?

    asked by Brandon
  97. Psychology

    "How are a cat and a dog alike?" An answer to this question requires: a)crystallized intelligence b)intrapersonal intelligence c)fluid intelligence d)Eastern intelligence I think c

    asked by Nicci
  98. Psychology

    "Who was the first vice president of the United States". the correct answer to this question requires: a) Crystallized intelligence b) intrapersonal intelligence c) fluid intelligence d) Eastern intelligence I think a

    asked by Nicci
  99. Psychology

    The experimental rats were being raised in separate environments. One group lived in a traditional cage in a quiet, well-lit room. They were supplied with plenty of food and water. The second group inhabited "Rat Disney Land". There were colorful toys,

    asked by Nicci
  100. Math

    Express fraction as a percent

    asked by Jeanette
  101. Chemistry

    How do i calculate plate number, distribution constant, mobile phase and stationary phase volume for tlc not HPLC/ GC

    asked by Pharmacy
  102. colleege homework help

    In F. Scott Fitzgerald's story "Bernice Bobs Her Hair," we are very likely to

    asked by Anonymous
  103. Psychology

    The entire class was in an uproar. The teaching assistant had proctored the exam while the professor was attending a conference, and the test seemed unrelated to the chapters that they had studied. The students' complaints are based on the test's lack of:

    asked by Nicci
  104. English

    I changed it from moreover to and. Correct? They told him that he was never going to be anyone important because of a name like his, and because of the way he looked and dressed.

    asked by lizzie
  105. Spanish--CHECK PLEASE (POR FAVOR)!

    Help please, are all my answers correct? Distingue entre todos los usos con se en las oraciones a continuación. 1) Allí es donde _______ coches/carros/autos de Europa. Vamos mañana para buscar uno para comprar. A) fueron vendidos B) se venden C) se me

    asked by Polly
  106. Chemistry

    Serine exists in its zwitterion form at a pH of 5.7. Draw the structural formula for the same. Explain the manner in which the structural formula of polar and non-polar amino acids would vary

    asked by mema
  107. ORGANIC CHEMISTRY 2

    Ethanol has boiling of 78.5 while dimethyl ether has boiling point of -24.9;so account for this diffrence in boiling points since they both have the same molecular weight.how can this be explained using diagrams?

    asked by ASTHON LEBUHANG
  108. CONTACTS,CONFLICTS,AND THE CRUCIBLE

    As a result of his stay in Cairo, Mansa Musa caused

    asked by titus
  109. Is this correct?

    is this correct? Completely factor the following expression: 64y^2-49z^2 Is the answer: 128 y-49

    asked by Ashley
  110. Can someone help me with this one Please! :)

    factor out the greatest common factor -36m^2n^3-60mn^4+18m^4n^2

    asked by Ashley
  111. MATH!

    is this correct? Completely factor the following expression: 64y^2-49z^2 Is the answer: 128 y-49

    asked by Ashley
  112. math

    factor out the greatest common factor -36m^2n^3-60mn^4+18m^4n^2

    asked by Ashley
  113. Statistics

    Mean of n numbers X1, X2,--------Xn is m. If Xn is replaced by x the new mean is

    asked by Sharon
  114. science

    how long does it take to dissolve 3 ice cubes in a glass of water

    asked by will
  115. Physics

    A train compartment of size 4m and 3m is moving on a horizontal track. A man fires a shot from outside with a velocity 10 m/s at an angle 53' with the track. A person sitting inside the compartment observe the bullet one corner to diagonally uposite coner.

    asked by Sonu
  116. algebra

    Describe what the graph of interval[-4,10] looks like. Please answer

    asked by babs
  117. statistics

    Suppose the following summary statistics are obtained from a large group of individuals:X =52.0, Sx= 8.7, Y =147.3, Sy = 16.9. Dorothy receives an Xscore of 52. What is her predicted Y score if r = o?

    asked by Tina
  118. science

    how does social and cultural influences influence science education

    asked by Melissa
  119. math

    help needed

    asked by sober
  120. education

    Create an outline of your Educational Debate Persuasive Paper. The outline should be based on one of the educational debates found in Appendix A and should highlight the main points of your paper. Include an annotated bibliography of at least three sources

    asked by Anonymous
  121. Math

    Evaluate 5^C3

    asked by Jen
  122. physics

    A man starts running a race with velocity v. in the begining of race he finds wind is blowing at an angle alpha with the track. As he progress straight horizontal road wind appears to rotate uniformly and by the gime he completes the race wind appears to

    asked by Sonu
  123. Economics

    What is the role of economic theory in the way economies are run today? Give some concrete examples.

    asked by Joanne
  124. math 104

    log_(9) \(73\)

    asked by Anonymous
  125. math

    what is the sum of 5/16 and 7/8

    asked by Anonymous