Questions and responses by Anonymous, page 25
  1. Science

    a 5 kg skateboard moves at 7 m/s^2 . What is the force of the skateboard? 35 N

    asked on April 30, 2014
  2. Math

    During exercise, the recommended maximum heart rate in beats per minute is modeled by the formula M=176-0.8A, where M is the maximum heart rate and A is the person’s age. Approximately, at what age would you have a recommended heart rate in beats per

    asked on April 25, 2014
  3. Rectangular coordinates to polar coordinates

    1) I'm asked to find 2 sets of polar coordinates for the point for 0≤ θ< 2pi from a given pair of rectangular coordinates . For instance, one of the coordinates was (-3,4). I found r = plus and minus 5.Then θ= arctan (y/x)= arctan (4/-3)= -.9273 I know

    asked on April 16, 2014
  4. math

    Find the interest due to the bank on a loan of $1,000 at 7.5% for 280 days.

    asked on April 12, 2014
  5. Grammar

    Rewrite the paragraph, correcting all errors in subject-verb agreement. In this article about Arthur Ashe, there is several stories about the tennis player's inner strength. Here is some examples: Ashe did not let the other players know what he was

    asked on April 5, 2014
  6. physics

    In a dentist's office, an X-ray of a tooth is taken using X-rays that have a frequency of 7.01 1018 Hz. What is the wavelength in vacuum of these X-rays?

    asked on April 5, 2014
  7. College Chemistry - Science

    In an acid-base experiment at 25.0°C, a sodium hydroxide solution was standardized against KHP. The average value for the concentration of the sodium hydroxide solution was calculated to be 0.0125 M. This solution was used to titrate the phosphoric acid

    asked on March 2, 2014
  8. english

    29. Which of the following is not a major conflict in Katherine Ann Porter's short story "He"? (1 point) A)the difficulty a family has trying to survive financially B)the struggle of a family to take care of a disabled child C)the concern of a family for

    asked on March 1, 2014
  9. Math

    Which of the following is equal to (n - 3)^2 if n = 11? A. (n + 6) (n - 6) B. (n + 5) (n - 7) C. (n + 4) (n - 8) D. (n + 3) (n - 9) E. (n + 2) (n - 10)

    asked on February 4, 2014
  10. Math

    A company’s profit is described by the equation P(x) = – 5x^2 + 300x + 15,000 where x is the price in dollars that the company charges for its product. What should the company charge for the product to generate the maximum profit? a.) $20 b.) $30 c.)

    asked on February 4, 2014
  11. Statistics

    The per-store daily customer count (i.e., the mean number of customers in a store in one day) for a nationwide convenience store chain that operates nearly 10,000 stores has been steady, at 900, for some time. To increase the customer count, the chain is

    asked on January 30, 2014
  12. speed

    a train approaching a crossing changes speed from 25 m/s to 10 m/s in 240 s. How can the train's acceleration be described?

    asked on January 30, 2014
  13. physical science

    How much time is needed for a car to accelerate from 8.0 m/s to speed of 22 m/s if the acceleration is 3.0 m/s^2?

    asked on January 29, 2014
  14. algebra

    suppose that S varies directly as the 2/5 power of T, and that S=8 when T=32. Find S when T=243.

    asked on January 26, 2014
  15. Science

    Why is freshwater a limited resource? A. because most water on Earth is in lakes B. because most water on Earth is in clouds C. because most water on Earth is in the ground D. because most water on Earth is saltwater D

    asked on January 10, 2014
  16. Biology

    Why is feedback inhibition a useful thing for enzyme reactions in a cell? Are there biology tutors in this forum??

    asked on December 13, 2013

    which of the following would most likely lead to increased biodiversity

    asked on December 3, 2013
  18. Health (Ms. Sue)

    1. Summarize how common substances can trigger allergic reactions. A: Common substances can trigger allergic reactions when immune systems cells encounter a foreign particle, sending out chemical signals that cause the body to react? 2. Identify how people

    asked on November 30, 2013
  19. Health (Ms. Sue)

    1. What are two ways that society could deal with future concerns about genetic information? A: ? 2. Identify how keeping person health records can help a person cope with hereditary diseases. A: Keeping personal health records can help a person cope with

    asked on November 30, 2013
  20. Algebra

    A candy store keeps track of its sales during the month of October. Below is the number of sales for the first, second, third, and fourth weeks of the month. Which graph could represent the data shown below? Week- 1,2,3,4 Candy Sales- 97,168,259,375

    asked on November 18, 2013
  21. Algebra

    A school is keeping track of the number of tickets remaining for its end-of-year festival. Below is the number of sales for the first, second, third, and fourth weeks of the month leading up to the festival. Which graph could represent the data below?

    asked on November 18, 2013
  22. math

    translate 112 is the product of Diane's height and 8 to an equation

    asked on November 11, 2013

    Please explain the answer. Which statement about this reaction is correct? 2Fe(s)+3CO2(g)--->Fe2O3(s)+3CO(g) delta H = 26.6 kJ A. 26.6 kJ of energy are released for every mole of Fe reacted B. 26.6 kJ of energy are absorbed for every mole of Fe reacted C.

    asked on November 11, 2013
  24. Algebra Check

    What is the domain of the function below? ((0,2),(3,1) (5,2) (8,4)) a. (1,2,4) b. (0,3,5,8)** c. (0,1,2,3,4,5,8) d. ((0,2),(3,1) (5,2) (8,4)) Is the following relation a function? ((0.3,0.6), (0.4,0.8), (0.3,0.7), (0.5,0.5)) a. yes b. no** c. cannot be

    asked on November 11, 2013
  25. Computer Programming using python

    Assume s is a string of lower case characters. Write a program that prints the number of times the string 'bob' occurs in s. For example, if s = 'azcbobobegghakl', then your program should print Number of times bob occurs is: 2 For problems such as these,

    asked on October 24, 2013
  26. English

    Check my answers please 9. The author of "My Brother's Keeper" mainly develops Jamie’s character through his actions *dialogue and thoughts the narrators description other’s reaction to him 10. In "My Brother's Keeper," what does Ted want Jamie to do

    asked on September 30, 2013
  27. Algebra I

    4 - t = 3(t - 1) - 5 a. 3 b. 6 c. no solution d. identity A? 8x - 2(x + 1)= 2(3x - 1) a. 0 b. 2 c. no solution d. identity D? 3(c - 2)= 2(c - 6) a. 2 b. -6 c. no solution d. identity B? 0.5(m + 4) = 3(m - 1) a. -2 b. 2 c. no solution d. identity B?

    asked on September 27, 2013
  28. pressure

    an ideal gas in a sealed container has an initial volume of 2.70L. at constant pressure, it is cooled to 25.00 C where its final volume is 1.75L. what was the initial temperature?

    asked on September 18, 2013
  29. Geography

    How do landforms and climate affect the distribution of population? My answer: Landforms and climate affect this due to some lands being unsuitable for human habitation, which influences where people live, resulting in population distribution.

    asked on September 5, 2013
  30. physics

    A student throws a ball vertically upward such that it travels 7.4m to its maximum height. Part A If the ball is caught at the initial height 2.7s after being thrown, what is the ball’s average speed? Part B What is the ball’s average velocity?

    asked on September 5, 2013
  31. Math

    Six nickels is what percent of a dollar?

    asked on August 8, 2013
  32. Geometry

    Point Y lies on line segment XZ, between X and Z. The (x,y) coordinates for X and Z are (7,2) and (-3,-3), respectively. If the ratio of line segment XY to line segment YZ is 2 to 3, what are the (x,y) coordinates of Y?

    asked on July 31, 2013
  33. Chemistry help

    2.00g of NaOH are dissolved in water to make 2.00L of solution. What is the concentration of hydronium ions, [H3O+], in this solution?

    asked on July 29, 2013
  34. biology

    Relate membranes to energy metabolism, redox reactions, and ATP synthesis in both eukaryotic and prokaryotic cells.

    asked on June 26, 2013
  35. bio

    You want to design a breathing machine that will bring 500 mL of air into the lungs. You begin with 100 mL of air at 2 atm of pressure. How would you change the pressure in your machine to accomplish your goal?

    asked on June 13, 2013
  36. physics

    The speed of a moving bullet can be determined by allowing the bullet to pass through two rotating paper disks mounted a distance d apart on the same axle (Fig. below). From the angular displacement of the two bullet holes in the disks and the rotational

    asked on May 18, 2013
  37. Algebra 2 ..

    Simplify. 1. (1/log base 3 of 60)+ (1/log base 4 of 60)+ (1/log base 5 of 60) 2. (log base 16 of x)+ ( log base 4 of x) + (log base 2 of x)=7

    asked on April 21, 2013
  38. college physics

    Juggles the clown stands on one end of a teeter-totter at rest on the ground. Bangles the clown jumps off a platform 2.5 m above the ground and lands on the other end of the teeter-totter, launching Juggles into the air. Juggles rises to a height of 3.8 m

    asked on April 11, 2013
  39. physics

    A spherical mirror is polished on both sides. When the concave side is used as a mirror, the magnification is +2.7. What is the magnification when the convex side is used as a mirror, the object remaining the same distance from the mirror? If the object is

    asked on April 8, 2013
  40. chemistry

    What volume of 0.1 M NaOH is required to neutralize 30 mL of 0.1 M HCl?

    asked on February 12, 2013
  41. Chemistry

    Nitric oxide reacts with chlorine to form nitrosyl chloride, NOCl. Use the following data to determine the rate equation for the reaction. NO + (1/2)Cl2 -> NOCl Expt.[NO] [Cl2] Initial rate 1 0.22 0.065 0.96 M/min 2 0.66 0.065 8.6 M/min 3 0.44 0.032 1.9

    asked on February 6, 2013
  42. maths

    Find five numbers in A.P. whose sum is 12.5 and the ratio of first to the last is 2 : 3.

    asked on February 4, 2013
  43. financial math

    Mary is buying several items that cost $128.25 total. She is using a store coupon for 35% off her purchases. She has to pay 4% sales tax. Calculate the total cost of the items.

    asked on January 24, 2013
  44. Math

    If a wheel turning at a constant rate completes 100 revolutions in 10 sec what is its angular speed?

    asked on January 16, 2013
  45. maths-urgently needed

    The volume of a cylinder is 48.125 cm3, which is formed by rolling a rectangular paper sheet along the length of the paper. If cuboidal box (without any lid i.e., open at the top) is made from the same sheet of paper by cutting out the square of side 0.5

    asked on January 16, 2013
  46. investing

    Which of the following statements is true about financial planning? A. Any kind of financial expert (such as a stockbroker, lawyer, or accountant) can help you develop a comprehensive financial plan. B. Once you have painstakingly developed a financial

    asked on December 16, 2012
  47. Pre-Algebra

    One hundred nautical miles equals about 185 kilometers. To the nearest kilometer, how far in kilometers is 290 nautical miles?

    asked on December 13, 2012
  48. Math

    Suppose the supply and demand for a certain videotape are given by: supply: p=1/3q^2; demand: p=-1/3q^2+48

    asked on November 16, 2012
  49. Physics

    The box of a well-known breakfast cereal states that one ounce of the cereal contains 129 Calories (1 food Calorie = 4186 J). If 2.55% of this energy could be converted by a weight lifter's body into work done in lifting a barbell, what is the weight of

    asked on November 3, 2012
  50. Math

    If f(x) + x^(2)[f(x)]^5 = 34 and f(1) = 2, find f '(1).

    asked on October 31, 2012
  51. physics

    Two artifacts in a museum display are hung from vertical walls by very light wires, as shown in the figure.Find the tension in the horizontal wire ifw=158Nandm=30.0 kg.

    asked on October 22, 2012
  52. calculus

    a man on a dock is pulling in a boat by means of a rope attached to the bow of the boat 1ft above the water level and passing through a simple pulley located on a dock 8ft above the water level. if he pulls in the rope at a rate of 2ft/sec, how fast is the

    asked on October 10, 2012
  53. chemistry

    How many sodium ions are present in 325 mL of 0.850 M Na2SO4?

    asked on October 4, 2012
  54. Physics

    An automobile tire is rated to last for 50000 miles. To an order of magnitude, through how many revolutions will it turn over its lifetime?

    asked on October 3, 2012
  55. english

    Correct the errors in dangling and misplaced modifiers by rearranging or rewriting the following sentences. 1.After boarding Hard Luck Airlines, the meals convinced us to return by ship.

    asked on September 24, 2012
  56. calculus

    Find the x-coordinates of all points on the curve f(x) = sin 2x − 2 sin x at which the tangent line is horizontal. (Enter your answers as a comma-separated list. Use n to represent any integer.)

    asked on September 23, 2012
  57. math

    what are the common factors of 120 and 420

    asked on September 18, 2012
  58. math (statistics)

    the set of integers between 1 and 50 divisible by 8

    asked on August 25, 2012
  59. art 101

    Contrast The Elevation of the Cross by Rubens with Rembrandt’s Return of the Prodigal Son. Explain how each work reflects the artist and his temperament. How does each work mirror sociopolitical environment of each artist? Use one example from

    asked on August 23, 2012
  60. physics

    A copper block is removed from a 310 C oven and dropped into 1.10 kg of water at 20.2 C. The water quickly reaches 25.4 C and then remains at that temperature.what is the mass of the block?

    asked on August 9, 2012
  61. Physics

    Two crewmen pull a boat through a lock, as shown in the figure. One crewman pulls with a force of F1 = 145 N at an angle of θ = 32° relative to the forward direction of the raft. The second crewman, on the opposite side of the lock, pulls at an angle of

    asked on July 3, 2012
  62. Math

    Find 9 tens more than 327508

    asked on June 29, 2012
  63. finance300

    3) Your uncle has $280,000 invested at 7.5%, and he now wants to retire. He wants to withdraw $35,000 at the end of each year, starting at the end of this year. He also wants to have $25,000 left to give you when he ceases to withdraw funds from the

    asked on June 9, 2012
  64. American lit.

    In which sentence does the underlined noun clause function as a direct object. A. _whoever works as a lifeguard_ needs special training. B. We like to set up our blanket in _whatever place gets some shade_. C. Experts say that one of the best times to put

    asked on June 6, 2012
  65. statistics

    The actual weights of bags of pet food are normally distributed.The mean of the weights is 50.0lb,with a standard deviation of 0.2lb. Sketch a normal cuve for the distribution.Label the x-axis at one,two,and three standard feciation from the mean,in

    asked on June 4, 2012
  66. physics

    A stone is suspended from the free end of a wire that is wrapped around the outer rim of a pulley, as shown in the figure (see the figure ). The pulley is a uniform disk with mass 10.4 and radius 51.0 and turns on frictionless bearings. You measure that

    asked on May 13, 2012
  67. Math

    A flag pole is supported by two wires, each attached to an anchor in the ground 10m from the base pole. The wires have angles of elevation of 37 degrees and 47 degrees

    asked on April 25, 2012
  68. statistics

    The probability that a house will develop a leak is 5%. If 20 house holds are randomly selected, what is the mean number if houses that developed leaks?

    asked on April 23, 2012
  69. chemistry

    Consider the cell: (Pt) H2/H+ || (Pt) H+/H2. In the anode half-cell, hydrogen gas at 1.0 atm is bubbled over a platinum electrode dipping into a solution that has a pH of 7.0. The other half-cell is identical to the first except that the solution around

    asked on March 27, 2012
  70. communication

    Which of the following is NOT true of nonverbal communication? A.It is continuous. B.It uses a single channel. C.It usually can be controlled. D. It is unstructured and follows few rules. I think it is A. But not to sure

    asked on March 11, 2012
  71. math

    A purse contains $3.65 in quaters and dimes. There are 9 more quaters than dimes. Find the number of quaters and dimes.

    asked on February 21, 2012
  72. geometry

    A triangle has side lengths of 14 cm, 48 cm, and 50 cm is it acute, obtuse, or right

    asked on February 15, 2012
  73. physics

    A wooden cube of side 10cm has mass 700g.What part of it remains above the water surface while floating?

    asked on February 10, 2012
  74. GA perimeter

    What is the specific heat of a metal if 7.74 x 103 J of energy is required to warm a 75.0 g sample of the metal from 10 °C to 125 °C?

    asked on January 21, 2012
  75. Physics

    Two point charges are 10.0 cm apart and have charges of 2.0 μC and –2.0 μC, respectively. What is the magnitude of the electric field at the midpoint between the two charges? 8.99*10^9(2*10^-6/.025)=719200 Two equal charges are separated by 3.7 x 10-10

    asked on January 13, 2012
  76. 8th grade math

    The total number of interior angles in two regular polygons is 17, and the total number of diagonals is 53. How many sides does each polygon have? Show work and explain.

    asked on December 18, 2011
  77. 5th grade math

    abel belle, and cindy have $408 altogether. belle has $7 more than cindy $5 more than abel how much does abel have

    asked on December 12, 2011
  78. Biology

    When elongated, tube-shaped cells from the lining of the intestine are treated with a certain chemical, the cells sag and become round blobs. The internal structures disrupted by this chemical are probably _____. A. cell junctions B. microtubules C. rough

    asked on December 11, 2011
  79. English

    The following lines are from Alexander Pope's "An Essay on Criticism." In it, Pope (1688-1744) gives his opinions on the secret of good writing, opinions that were very consistent with his times. Answer all questions based upon these lines. Those RULES of

    asked on December 6, 2011
  80. arithmetic

    The 8th term of an A P is 5times the third term while the 7th term is 9 greater than the 4th term.what are the first five term

    asked on November 4, 2011
  81. chemistry

    a 2.00-liter sample of a gas has a mass of 1.80 grams at STP. What is the density , in grams per liter , of this gas at Stp?

    asked on October 22, 2011
  82. finance

    Sterling optical and Royal Optical both make glass frames and each is able to generate earnings before interest and taxes of $120,000.Debt @12% $600,000 Debt @12% $200,000, Common stock, $5 par 400,000 Common stock, $5 par 800,000,Total 1,000,000 Total

    asked on September 30, 2011
  83. calculus 3

    A rectangular box has length 20 inches, width 14 inches, and a height of 13 inches. Find the angle between the diagonal of of the box and the diagonal of its base. The angle should be measured in radians.

    asked on September 17, 2011
  84. statistics

    In one elementary school, 200 students are tested on the subject of Math and English. The table below shows the mean and standard deviation for each subject. Mean SD Math 67 9.58 English 78 12.45 One student’s Math score was 70 and the same

    asked on September 12, 2011
  85. Geometry

    ABCD is a trapezoid. If AC is equal to 8x - 3 and BD is equal to 2x + 9, find the value of x so that ABCD is isosceles.

    asked on September 4, 2011
  86. trig

    sin2xcosx-sinx=0 interval(0,2pi)

    asked on August 14, 2011
  87. Statistics

    A group of 6 children are choosing colors of pencils to use to draw a picture. The available colors are black, red, and blue. If the second child refuses to use red pencils and the third child refuses to use blue pencils, then how many ways are there for

    asked on June 25, 2011
  88. vocab

    Using a dictionary look up and then list four definitions of the word nice that you would use in a paragraph to develop this topic sentence: "The word nice is surprisingly ambiguous."

    asked on June 23, 2011
  89. geometry

    A cylinder is inscribed in a cube. If the edge of the cube is 3" long, find the volume of the cylinder.

    asked on June 14, 2011
  90. English

    Death is a commonplace in the novel. Do Hal, Mercedes, and Charles deserve their fate? Why or Why not?

    asked on May 23, 2011
  91. Algebra II

    The bear population increases at a rate of 2% per year. There are 1573 bear this year. Write a function that models the bear population. How many bears will there be in 20 years?

    asked on May 8, 2011
  92. how to write 2nd may 2011 in 5 letters without usi

    how to write 2nd may 2011 in 5 letters without using numbers

    asked on May 3, 2011
  93. physics

    A block of mass m = 5 kg is attached to a spring (k = 35 N/m) by a rope that hangs over a pulley of mass M = 7 kg and radius R = 4 cm, as shown in the figure. Treating the pulley as a solid homogeneous disk, neglecting friction at the axle of the pulley,

    asked on April 3, 2011
  94. geometry

    if ED=10 and DB=3x-8 whats the lenght of EB

    asked on April 1, 2011
  95. marketing

    47) When segmenting broad product-markets, cost considerations tend A. To lead to more aggregating. B. To lead to a large number of small, but very homogeneous, product-market segments. C. To be unimportant as long as the segmenting dimensions are

    asked on March 27, 2011
  96. geometry

    The measure of a single angle in a regular octagon is (4x + 12)°. Find the value of x. Show equations and all work that leads to your answer.

    asked on March 17, 2011
  97. Answer

    A company decides to investigate the amount of sick leave taken by its employees. A sample of seven employees yields the following number of sick leave taken in the past year 1 1 3 0 1 7 1 a. Find and interpret the range

    asked on February 28, 2011
  98. physics

    You walk 53 m to the north, then turn 60° to your right and walk another 45m. Determine the direction of your displacement vector. Express your answer as an angle relative to east.

    asked on February 16, 2011
  99. Chemistry 219

    An amount of 1.250g of an alloy (90% Ag, 10% Cu) was treated with HNO3 and H2SO4 to form Ag2SO4 and CuSO4. The solution was then treated with Cu wire to precipitate silver. The resulting solution was treated with excess zinc to precipitate copper. (show

    asked on February 8, 2011
  100. Math

    At a temperature of 20°C, the volume V (in liters) of 1.33 g of O2 is related to its pressure p (in atmospheres) by the formula V(p) = 1/p (a) What is the average rate of change of V with respect to p as p increases from p = 7 to p = 8? L/atm (b) What is

    asked on February 4, 2011