Most popular questions and responses by Peter
  1. economics

    Suppose that there are three beachfront parcels of land available for sale in Asilomar and six people who would each like to purchase one parcel. Assume that the parcels are essentially identical and that the minimum selling price of each is $600,000. The

    asked on February 10, 2012
  2. Science

    14.If a forest ecosystem is removed through clear-cutting, many species of organisms that lived in that ecosystem disappear. Their loss is due to ________________________. 15.When fossil fuels are burned, they produce ________________, the main greenhouse

    asked on January 5, 2014
  3. geometry

    Suppose you have a conical shaped tent that you will use for camping. You want to ring along a tarp to fully cover the lateral area in case of inclement weather. The tent is 13 feet across and stands 8 feet high. What is the lateral area that the tarp

    asked on May 27, 2018
  4. geometry

    An ice cream company manufactures and distributes ice cream cups and cones to grocery stores. The company sells the ice cream cups in packages of 12, 18, and 24 units, and the ice cream cones in packages of 14 and 21 units. Which of the following

    asked on May 27, 2018
  5. physics

    Calculate the total resistance for a 650 ohm, a 350 ohm, and a 1000 ohm resistor connected in series.

    asked on February 4, 2015
  6. Science

    Compare renewable and nonrenewable energy sources, and discuss the effects of each on biodiversity.

    asked on January 6, 2014
  7. Chemistry

    Under identical conditions, separate samples of O2 and an unknown gas were allowed to effuse through identical membranes simultaneously. After a certain amount of time, it was found that 4.92 mL of O2 had passed through the membrane, but only 3.04 mL of of

    asked on April 15, 2014
  8. Physics

    A 150N block rests on a table. The suspended mass has a weight of 73N. a) What is the magnitude of the minimum force of static friction required to hold both blocks at rest? Answer in units of N b)What minimum coefficient of static friction is required to

    asked on October 21, 2012
  9. maths

    The Cooking Club made some pies to sell at a basketball game to raise money for the new math books.The cafeteria contributed four pies to the sale.Each pie was then cut into five pieces and sold.The were a total of 60 pieces to sell.How many pies did the

    asked on August 10, 2014
  10. probability

    Problem 2. Continuous Random Variables 2 points possible (graded, results hidden) Let 𝑋 and 𝑌 be independent continuous random variables that are uniformly distributed on (0,1) . Let 𝐻=(𝑋+2)𝑌 . Find the probability 𝐏(ln𝐻≥𝑧) where

    asked on August 5, 2019
  11. help me plss

    1. 48 c = __ qt (1 point) 6 8 10 12 2. 96 oz __ 5 lb (1 point) < > = 3. 6 yd, 1 ft = __ ft (1 point) 7 12 19 36 4. lb = __ oz (1 point) 104 108 112 136

    asked on October 28, 2012
  12. Science

    13.Which of the following statements correctly states how human activity and biodiversity affect one another? A.As humans develop land for homes and industry, biodiversity increases B.As humans restrict fishing and oil drilling, biodiversity decreases C.As

    asked on January 5, 2014
  13. chemistry

    At 1285 degree C the equilibrium constant for the reactin Br2(g) 2Br(g) is Keq= 1.04 * 10^-3. A 0.200 L vessel containing an equilibrium mixture of the gases has 0.245 Br2(g) in it. What is the mass of Br(g) in the vessel? Please help, Thanks!!

    asked on April 19, 2010
  14. Science

    Study the image below. Future changes in the meadow area are likely to occur as the result of the process of _________________. ( the picture is lots of grass with lots of flowers)

    asked on January 5, 2014
  15. Science

    3. A nonnative species of animal is introduced into a healthy ecosystem. In its new environment, this species has no predators, although it preys on several native animals in the ecosystem. Make a prediction about the biodiversity and health of this

    asked on January 5, 2014
  16. Algebra

    A winch is used to tow a boat to a dock. The rope is attached to the boat at a point 15 feet below the level of the winch. Find the distance from the boat to the dock when there is 75 feet of rope out. I got 15^2+75^2=X^2. I put a square root around each

    asked on October 5, 2009
  17. Chemistry Problem

    At 25 oC, Kc = 0.145 for the following reaction in the solvent CCl4. 2BrCl Br2 + Cl2 A solution was prepared with the following initial concentrations: [BrCl] = 0.0482 M, [Br2]= 0.0307 M, and [Cl2]= 0.0277 M. What will their equilibrium concentrations be?

    asked on March 8, 2013
  18. science

    a cylinder of diameter 1cm at 30 degrees celcius is to be slid into a steel plate. the hole has a diameter 0.9997cm at 30 degrees celcius. to what temperature must the plate be heated? for steel

    asked on May 12, 2014
  19. Science

    Study the animal in the image below. What can you infer about the animal from this image? ( the image is a frog that is camouflaged on a tree) A.Its skin color is a warning to potential prey B.Its skin color is the result of a disease C.Its skin color

    asked on January 5, 2014
  20. Science

    Fertilizers and pesticides applied to farm fields in Pennsylvania have made their way down into the Chesapeake Bay in Maryland. This is an example of _________________ pollution.

    asked on January 5, 2014
  21. Calculus

    The manager of a 100 unit apartment complex knows from experience that all units will be occupied if the rent is $500 per month. A market survey suggests that, on average, one additional unit will remain vacant for each $10 increase in rent. What rent

    asked on March 2, 2010
  22. Geometry

    A solid is composed of a cube with side length 6 meters and a hemisphere with diameter 6 meters. Find the volume of the solid.

    asked on June 1, 2011
  23. Physics Collision problem

    A 238U nucleus is moving in the x-direction at 4.8×105m/s when it decays into an alpha particle (4He) and a 234Th nucleus. The alpha moves at 1.2×107m/s at 36∘ above the x-axis. a. Find the speed of the thorium nucleus. v= b. Find the direction of the

    asked on November 25, 2014
  24. Science

    A biologist made population counts of four different species of animals in an ecosystem. What can you infer from these numbers about possible predator-prey relationships between the species? Species A:155 Species B:17 Species C:2467 Species D:19 A.Species

    asked on January 5, 2014
  25. Math

    Rafi had a board that was 15 1/2 FEET long he cut three pieces off the board that are each 3 and 7/8 feet long how much of the board is left

    asked on January 12, 2016
  26. Math

    3. At the end of a dock, high tide of 14 m is recorded at 9:00 a.m. Low tide of 6 m is recorded at 3:00 p.m. A sinusoidal function can model the water depth versus time. a) Construct a model for the water depth using a cosine function, where time is

    asked on December 18, 2016
  27. physics

    a roller whose diameter is 20 in weight 72 lbs. what horizontal force is necessary to pull the roller over a brick 2 in high when (a) the force is applied to the center, (b) at the top

    asked on October 12, 2012
  28. Chemistry

    Calculate the density of a substance in pennyweights per peck that has a volume of 0.371 hogsheads and a mass of 41.6 kg. 1 pennyweight = 1.55 grams 1 hogshead = 238.5 liters 1 peck = 9.091 liters. Answer in units of pw/pk.

    asked on September 27, 2012
  29. Algebra 2 Decay

    You have 20 grams of phosphorus-32 that decays 5% per day. How long will it take for hlaf of the original amount to decay?

    asked on February 17, 2012
  30. Physics

    A tow truck exerts a force of 3000 N on a car, accelerating it at 2 m/s2 . What is the mass of the car?

    asked on February 1, 2011
  31. algebra 1

    A survey was taken of students in math classes to find out how many hours per day students spend on social media. The survey results for the first-, second-, and third-period classes are as follows: First period: 2, 4, 3, 1, 0, 2, 1, 3, 1, 4, 9, 2, 4, 3, 0

    asked on June 2, 2016
  32. Engish 11

    Consider what you have learned about American history during the period of 1862 the early 1900s how did the stories by Mark Twain Ambrose Bierce and Emily Dickinson reflect what was going on in the country

    asked on December 18, 2012
  33. Physics

    If a 1.5V battery stores 5.0kj of energy,for how many minutes could it sustain a current of 1,2A?

    asked on January 29, 2013
  34. CHE 111-03L

    The following system is at equilibrium: 2X(s)+4Y(g)⇌Z(g) Classify each of the following actions by whether it causes a leftward shift, a rightward shift, or no shift in the direction of the net reaction. Half the Volume Remove Some X Double the Volume

    asked on October 2, 2016
  35. Econ

    Shep goes to his favorite coffee shop every morning and always buys one large latte, no matter whether there is a special or not (e.g. half price Mondays). What is his price elasticity of demand for lattes?

    asked on October 7, 2013
  36. english 3

    Which is the best restatement of the following sentence? Right or wrong, I assumed this ground, and now avow it

    asked on May 15, 2014
  37. Chemistry

    Naturally occurring boron is 80.20% boron-11 (of atomic mass 11.01 amu) and 19.80% of some other isotope form of boron. What must be the atomic mass of this second isotope in order to account for the 10.81 amu average atomic mass of boron? A. 10.99 amu B.

    asked on September 8, 2012
  38. Algebra 2 (Linear Programming)

    An airline will provide accommodations for a minimum of 2000 first-class, 1500 tourist, and 2400 economy-class passengers. Airplane P-1 costs $12,000 per miles to operate and can accommodate 40 first-class, 40 tourist, and 12 economy-class passengers.

    asked on October 4, 2011
  39. Maths

    A contains some red and blue balls. There are four more red than blue balls. A ball is removed at random and replaced. A second ball is removed. The probability that the two balls are different colours is 21/50. How many balls are in the box. Ans Drawing a

    asked on November 11, 2017
  40. probability

    Poisson Processes and Bayes' Rule We observe a Poisson process with unknown rate. The rate 𝜆 of the Poisson process is either 2 or 4, with equal probability, and the actual value is not known. We observe the process over the time interval [0,3] and

    asked on September 2, 2019
  41. Science

    Consider a piece of gold jewelry that weighs 9.50 g and has a volume of 0.685 cm^3 . The jewelry contains only gold and silver, which have densities of 19.3 g/cm^3 and 10.5 g/cm^3, respectively. If the total volume of the jewelry is the sum of the volumes

    asked on September 19, 2019
  42. Pre-Calculus

    Which sets of ordered pairs represent functions from A to B? Explain. A = {a, b, c} and B = {0, 1, 2, 3} A. {(a, 1), (c, 2), (c, 3), (b, 3)} B. {(a, 1), (b, 2), (c, 3)} C. {(1, a), (0, a), (2, c), (3, b)} D. {(c, 0), (b, 0), (a, 3)} I narrowed it down to

    asked on August 9, 2012
  43. Math

    The cost of fencing a square field at ₹ 27.50 per metre is ₹55000 . Find the cost of reaping the field at ₹45 per 100 metre² .

    asked on January 29, 2016
  44. Science

    Consider a piece of gold jewelry that weighs 9.50 g and has a volume of 0.685 cm^3 . The jewelry contains only gold and silver, which have densities of 19.3 g/cm^3 and 10.5 g/cm^3, respectively. If the total volume of the jewelry is the sum of the volumes

    asked on September 20, 2019
  45. Organic Chem

    Outline a separation scheme for isolating pure isopentyl acetate from the reaction mixture.

    asked on April 16, 2012
  46. chemistry

    A sample of 300.0g of drinking wtare is found to cntain 38 mg Pb. What is this concentration in parts per million?

    asked on May 8, 2009
  47. Science

    A 10.0 cm long cylindrical glass tube, sealed at one end, is filled with ethanol. The mass of ethanol needed to fill the tube is found to be 11.82 g . The density of ethanol is 0.789 g/mL. Calculate the inner diameter of the tube in centimeters.

    asked on September 19, 2019
  48. chemistry

    according to the data in the merck index,if 1,0g of aspirin is dissolved in 100ml of water at 37,how much aspirin will precipitate out of solution when it is cooled to 25.

    asked on March 18, 2017
  49. chemistry

    what is the formula of iron III tannate?

    asked on October 16, 2012
  50. Physics

    determine the submerged depth of a cube of steel 0.3m on each side floating in mercury given the specific gravities of steel and mercury as 7.8 and 13.6 respectively.

    asked on November 27, 2014
  51. criminal law

    As a computing investigator for your local sheriff’s department, you have been asked to go with a detective to a local school that received a bomb threat in an anonymous email. The detective already has information from a subpoena sent to the last know

    asked on April 28, 2010
  52. physics

    A baseball is seen to pass upward by a window 27 m above the street with a vertical speed of 12 m/s. The ball was thrown from the street. (a) What was its initial speed? (b) What altitude does it reach? (c) How long after it was thrown did it pass the

    asked on September 4, 2007
  53. Algebra 1

    A survey was taken of students in math classes to find out how many hours per day students spend on social media. The survey results for the first-, second-, and third-period classes are as follows: First period: 2, 4, 3, 1, 0, 2, 1, 3, 1, 4, 9, 2, 4, 3, 0

    asked on June 2, 2016
  54. Calculus

    How would I find out what the height of the pile would be after 5 minutes? A machine starts dumping sand at the rate of 20 m3/min, forming a pile in the shape of a cone. The height of the pile is always twice the length of the base diameter. The volume

    asked on December 31, 2014
  55. Chemistry

    Balance this chemical equation. K4Fe(CN)6 + KMnO4 + H2SO4 ---> KHSO4 + Fe2(SO4)3 + MnSO4 + HNO3 + CO2 + H2O

    asked on November 10, 2012
  56. english

    - Computers - English - Foreign Languages - Health - Home Economics - Math - Music - Physical Education - Science - Social Studies GRADE LEVELS - Preschool - Kindergarten - Elementary School - 1st Grade - 2nd Grade - 3rd Grade - 4th Grade - 5th Grade - 6th

    asked on January 8, 2010
  57. Algebra 2

    What is the maximum product of two numbers whose sum is 22? What numbers yield this product?

    asked on January 18, 2012
  58. algebra

    Jane has 3 times as many cards as peter. the average number of cards owned by the two children is 64. how many cards does jane have?

    asked on November 20, 2017

    An automobile travels 30 km due east on a level road . It then turns due north at an intersection and travels 40km before stopping. What is the the resultant displacement of the car?

    asked on October 16, 2013
  60. physics

    On a cold winter morning, a child sits on a sled resting on smooth ice. When the 9.10 kg sled is pulled with a horizontal force of 36.0 N, it begins to move with an acceleration of 2.10 m/s^2. The 25.0 kg child accelerates too, but with a smaller

    asked on October 11, 2009
  61. chemistry

    draw Lewis Structures for the following FIVE elements. H2S CH2Cl2 NH3 C2H6 CH3OH

    asked on January 21, 2009
  62. math

    Nine more than the quotient of two and a number x.

    asked on February 1, 2018
  63. Pre-Calculus

    If θ represents an angle such that sin2θ = tanθ - cos2θ, then sin θ - cosθ = A. -√2 B. 0 C. 1 D. 2√2 What equation can I use to solve this problem?

    asked on July 31, 2012
  64. geometry

    find the area of the trapezoid whose diagonals are 30 each and height of 18? I spent 2 hrs and I can't figure it out Pls. help 408-887-2612

    asked on April 16, 2010
  65. Math

    Ethel went to the farmers market to buy some eggs (not in a dozen cartons) on the way to the car she accidentally dropped the basket off eggs and all her eggs broke she couldn’t remember the exact number of eggs,but when she picked them out two at a time

    asked on March 19, 2019
  66. Algebra

    a car driver accelerates to a speed of 35 miles per hour and then takes her foot off the gas pedal even though she does not press the brake pedal at any time she eventually rolls to a stop which of the following most likely causes the car to come to a stop

    asked on April 17, 2015
  67. physics

    A spring whose spring constant is 650 N/m is compressed 0.300 m. What speed (in meters/second) can it give to a 0.300 kg ball when released

    asked on April 11, 2012
  68. physics

    A pile driver of mass 1000kg,hits a post 3m below it.It moves the post 10mm.Assuming gravity=10m/s,what is the kinetic energy of the pile driver?

    asked on November 22, 2012
  69. Statistics

    T-Test The article “Does Smoking Cessation Lead to Weight Gain?” described an experiment in which 322 subjects, selected at random from those show successfully participated in a program to quit smoking were weighed at the beginning of the program and

    asked on March 18, 2010
  70. Math

    Angelica ran in a half-marathon. The length of the race was 21.1 km. She ran 1700 m in the first 10 min of the race. In each 10-min interval after the first one, her distance decreased by 4%. How far did she run in the tenth 10-min interval?

    asked on January 10, 2017
  71. Chemistry

    1) What volume of oxygen gas at 28 Celsius and 102 kPa is needed to react completely with 150 g of iron according to the following reaction. Fe(s) + O2 (g) FeO(s) 2) A bunsen burner is lit in a lab that at 24.7 Celcius and 1.07 atm. What mass of water is

    asked on January 21, 2017
  72. Math

    A support wire to the top of a newly planted tree is 15 m long. It forms an angle of 30 degrees to the ground. On the same side of the tree, a second wire is also attached to the top of the tree, but it makes an angle of 45 degrees to the ground. Determine

    asked on December 5, 2016
  73. Art Study

    What does the expression of this superhero mean? Which of the following steps of art critique are you conducting for this type of question? describe analyze present interpret I think B?

    asked on August 25, 2016
  74. Physics

    A spacecraft in orbit around the moon measures its altitude by reflecting a pulsed 10Mz radio signal from the surface. If the spacecraft is 10km high what is the time between the emission of the pulse and the detection of the echo?

    asked on March 16, 2013
  75. chemistry help

    Determine the empirical formula for each substance. 1. A dead alkaline battery is found to contain a compund of Mn and O. Its analysis gives 69.6% Mn and 30.4% O. 2. A compound is 38.77% Cl and 61.23 %O. 3. Magnetic iron oxide is 72.4 % iron and 27.6%

    asked on March 23, 2009
  76. Physics 20

    dynamics A curling stone has a mass of 20kg. a curler pushed the stone across the ice to launch it down the rink. a)if the curler starts to move the stone by pushing it with 15N, what is the stones initial acceleration? b)once moving, how much force is

    asked on April 6, 2011
  77. Math

    Write and expression that has a value of 100 and the following restrictions: 1. Uses each of the four operations at most once 2. Uses no parentheses 3. Use only the digit 3

    asked on September 8, 2016
  78. Pre-Calc

    A pilot of an airplane flying at 12,000 feet sights a water tower. The angle of depression to the base of the tower is 25°. What is the length of the line of sight from the plane to the tower?

    asked on November 24, 2012
  79. algebra 1

    Given the data set (5, 9), (13, 12), (23, 16), which of the following equations best represents a line of best fit? y = three fourthsx − 7 y = four fifthsx + 7 *** y = three over twox + 7 y = two thirdsx − 7

    asked on March 21, 2016
  80. Biochemistry

    1. MES (2-(N-Morpholino)ethanesulfonic acid) is a common buffer used in biochemistry labs to stabilize proteins. The pKa for MES is 6.09. a. What is the pH of 1 liter of a 200 mM MES aqueous solution? Clue: you will need to solve a quadratic equation. (2.5

    asked on January 29, 2012
  81. Algebra2

    The function h(t) = -4.9t^2 + 49t expresses the approximate height, h, in meters, of a ball t seconds after it is launched vertically upward from the ground with an initial velocity of 49 meters per second. After approximately how many seconds will the

    asked on November 28, 2018
  82. math

    A ladder 14 ft long rests against a vertical wall. Let \theta be the angle between the top of the ladder and the wall and let x be the distance from the bottom of the ladder to the wall. If the bottom of the ladder slides away from the wall, how fast does

    asked on May 3, 2010
  83. Statistics

    Maria and Zoe are taking Biology 105 but are in different classes. Maria's class has an average of 78% with a standard deviation of 5% on the midterm, whereas Zoe's class has an average of 83% with a standard deviation of 12%. Assume that scores in both

    asked on January 9, 2009
  84. physics 2

    A thin nonconducting rod is bent to form a semi-circle of radius R. A charge Q is uniformly distributed along the upper half and a charge -Q is uniformly distributed along the lower half, as shown int he sketch at the right.find E vector at P, the center

    asked on September 13, 2010
  85. Physics

    A 150N block rests on a table. The suspended mass has a weight of 73N. a) What is the magnitude of the minimum force of static friction required to hold both blocks at rest? Answer in units of N b)What minimum coefficient of static friction is required to

    asked on October 21, 2012
  86. Math

    Find two quadratic functions, one that opens upward and one that opens downward, whose graphs have the given x-intercepts. (-3, 0), (-1/2, 0)

    asked on September 4, 2012
  87. physics

    A clown is rocking on a rocking chair in the dark. His glowing red nose moves back and forth a distance of 0.42m exactly 30 times a minute in a simple harmonic motion. (a) what is the amplitude of this motion? (b) what is the period of this motion? (c)

    asked on December 12, 2015
  88. Chemistry

    A volume of 70.0mL of aqueous potassium hydroxide(KOH) was titrated against a standard solution of sulfuric acid (H2SO4). What was the molarity of the solution if 19.2mL of 1.50M H2SO4 was needed? The equation is 2KOH+H2SO4->K2SO4+2H20

    asked on September 18, 2010
  89. math

    A two-digit number is chosen at random.What is the probability that the chosen number is a multiple of 7 ? please answer and explain

    asked on December 19, 2013
  90. Physics

    A box is sliding up an incline that makes an angle of 12.0° with respect to the horizontal. The coefficient of kinetic friction between the box and the surface of the incline is 0.180. The initial speed of the box at the bottom of the incline is 1.30 m/s.

    asked on October 21, 2011
  91. science

    why is atom electrically neutral

    asked on September 16, 2019
  92. Math

    A car moves along a straight road in such a way that its velocity (in feet per second) at any time t (in seconds) is given by v(x) = 3x sqrt(9-x^2) on an interval of 0,3. Find the distance traveled by the car in 3 seconds.

    asked on April 16, 2019
  93. Geometry

    Find the value of x in the right triangle if the sides given are x, x+1 and 7.

    asked on December 8, 2018
  94. chem

    A 0.158 g sample of magnesium metal reacts completely with 100.0 mL of 1.0 M hydrochloric acid in a coffee cup calorimeter. The temperature of the solution rose from 25.6°C to 32.8°C. What is ∆Hrxn? Assume the specific heat of the solution is 4.184

    asked on June 25, 2015
  95. Accounting

    What equation was used to get the answer in requirement 3? Consulting to control costs. Requirement 1. Compute Draper's predetermined overhead (OH) allocation rate for 2018. Estimated OH costs / Estimated direct labor costs = Predetermined OH allocation

    asked on January 14, 2017
  96. math

    a man buying a new car can choose among 6 different colors, 3 different steering wheel styles, and 4 different audio packages? what is the total number of different combos he can choose?

    asked on June 14, 2010
  97. Algebra 2

    A rancher is fencing off a rectangular area with a fixed perimeter of 76 m. What dimensions would yield the maximum area? Find the maximum area.

    asked on January 18, 2012
  98. Physics

    A cyclist approaches the bottom of a gradual hill at a speed of 14 m/s. The hill is 4.0 m high, and the cyclist estimates that she is going fast enough to coast up and over it without peddling. Ignoring air resistance and friction, find the speed at which

    asked on February 25, 2008
  99. Math

    Prove that 140 * 141 * 142 * ... * 159 * 160 is divisible by 4321.

    asked on April 15, 2015
  100. math

    As part of a new fitness plan, Sabir runs on a treadmill at the same speed for 15 minutes every morning. The table shows the calories he burns over time. Time (in minutes) 3 , 6, 9, 12, Number of calories Burned 15, 30, 45, 60, Write an equation to

    asked on April 22, 2013


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