Popular questions and responses by peter
  1. Algebra 2

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

    asked on January 18, 2012
  2. Biology

    B. The scientific name for tiger is Panthera tigris, cat is Felis domesticus and lion is Panthera leo. Which two are more closely related? Why?

    asked on July 6, 2020
  3. 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
  4. 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
  5. 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
  6. Probability-Cards

    As shown above, a classic deck of cards is made up of 52 cards, 26 are black, 26 are red. Each color is split into two suits of 13 cards each (clubs and spades are black and hearts and diamonds are red). Each suit is split into 13 individual cards (Ace,

    asked on October 7, 2016
  7. maths

    A snapshot measures 2 1/2 inches by 1 7/8 inches. It is to be enlarged so that the longer dimension will be 4 inches.The length of the enlarged shorter dimension will be 1. 2 1/2 inches 2. 2 5/8 inches 3. 3 inches 4. 3 3/8 inches 5. 3 5/8 inches

    asked on August 13, 2014
  8. 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
  9. 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
  10. 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
  11. 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
  12. math

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

    asked on February 1, 2018
  13. 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
  14. 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
  15. calc

    Give 2 positive and 2 negative angles that are coterminal with each angle? 1. 30 degrees 2. 135 degreed 3. -93 degrees

    asked on March 31, 2009
  16. 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
  17. 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
  18. english

    I hear America singing, the varied carols I hear; Those of mechanics--each one singing his, as it should be, blithe and strong; The carpenter singing his, as he measures his plank or beam, The mason singing his, as he makes ready for work, or leaves off

    asked on February 5, 2009
  19. 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
  20. 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
  21. 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
  22. 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
  23. 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
  24. Algebra

    the longer legs of a right triangle is 20 cm more than twice the length of the shorter leg. The length of the hypotenuse is 22 cm more than twice the length of the shorter leg. Find the side lengths of the triangle

    asked on March 30, 2014
  25. Science

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

    asked on January 6, 2014
  26. Math

    An object's velocity after t seconds is v(t)= 38-2t feet per second. a. How many seconds does it take for the object to come to a stop (velocity = 0)? b. How far does the car travel during that time? c. How many seconds does it take the car to travel half

    asked on April 30, 2016
  27. 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
  28. math

    R and T are points on straight line PQ on which PR = RT =TQ. what percent of PT is PQ ?

    asked on May 10, 2014
  29. 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
  30. Algebra 2

    (4a³b + 5a²b² + a⁴ + 2ab³)÷ (a² + 2b² + 3ab)

    asked on October 27, 2011
  31. 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
  32. Data

    You are making a string of coloured balloons as a decoration for the formal. If you have five green, six gold, and four white balloons, in how many ways can you arrange them along the string?

    asked on February 21, 2017
  33. chs

    Two wires support an electricity pole. if the wires make angles of 58°and 67° with the ground and |AB|=21m, calculate the lengths of the wires

    asked on August 16, 2015
  34. 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
  35. Chemistry

    a 22.5g sample of (NH4)2CO3 (ammonium carbonate) contains_____ moles of ammonium ions. A. o.468 b. 0.288 C. 0.234 d. 2.14 e. 3.47

    asked on November 1, 2009
  36. chemistry

    What is the equivalent weight of: (a) Potassium tetraoxalate, KHC2O4•H2C2O4•2H2O, if the complete neutralization is assumed. (b) Sodium carbonate if it is titrated to the phenolphthalein end point with HCl. The reaction is Na2CO3 + HCl = NaCl + NaHCO3.

    asked on May 6, 2020
  37. 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
  38. 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
  39. 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
  40. math

    Nancy Tai has recently opened a resolving charge account with MasterCard. Her credit limits is $ 1,000, but she not charged that much since opening the account. Nancy hasn't had the time to review her monthly statement promptly as she should, but over the

    asked on June 26, 2014
  41. 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
  42. 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
  43. physical science

    true/false the force of friction always opposes motion.

    asked on May 23, 2011
  44. 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
  45. 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
  46. Calc

    A plane flying horizontally at an altitude of 1 mi and a speed of 510 mi/h passes directly over a radar station. Find the rate at which the distance from the plane to the station is increasing when it is 6 mi away from the station. (Round to the nearest

    asked on November 8, 2009
  47. Data

    There are 52 white keys on a piano. The lowest key is A. The keys are designated A, B, C, D, E, F, and G in succession, and then the sequence of letters repeats, ending with a C for the highest key. a) If five notes are played simultaneously, in how many

    asked on March 5, 2017
  48. 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
  49. Physics

    If the specific heat of ice is 0.5 cal/g degree celsius, how much heat must be released from 5 g of water at 0 degree celsius to change it to ice at -4 degree celsius?

    asked on November 14, 2015
  50. Physics

    The driver pushes the accelerator pedal as far down as possible. The car does not accelerate above a certain maximum speed. Explain the reason for this in terms of the forces acting on the car.

    asked on September 13, 2015
  51. 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
  52. math

    Jonathan has 1/3 as many green marbles as he has red marbles and 1/6 as many red marbles as he has yellow marbles.What part of his collection is made up of yellow marbles?

    asked on May 22, 2014
  53. Math

    I have 18 blue marbles, 16 green marbles, and 22 red marbles in a bag. What is the chance I will pick a green if I pick a marble at random?

    asked on May 12, 2014
  54. math

    Indicate whether each statement is true or false by checking the appropriate box in the table below. a. 2x is a factor of the expression (2x + y ). True or False b. (2x + y ) is a factor of the expression 3(2x + y ). True or False c. (2x + y ) is a sum of

    asked on April 11, 2013
  55. 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
  56. 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
  57. Pre-Calculus

    How do I find the minimum or maximum of this y = 2x³ + 3x² - 12x? It makes 2 curves.

    asked on August 11, 2012
  58. Pre-Calculus

    Determine the open intervals on which the function is increasing, decreasing, or constant. f(x) = 3 f(x) = x^(2/3) f(x) = -x^(3/4)

    asked on August 11, 2012
  59. math

    Xenia wants to stuff a cube-shaped footstool that measures 10.25 inches on all edges. What is a good estimate of the number of cubic inches of foam peanuts that she will need? a. just over 1,331 cubic inches b. just over 1,000 cubic inches c. just over 30

    asked on March 11, 2012
  60. physics

    A falling skydiver has a mass of 123 kg. (a) What is the magnitude of the skydiver's acceleration when the upward force of air resistance has a magnitude that is equal to one-fourth of his weight? 7.35 m/s^2 (b) After the parachute opens, the skydiver

    asked on October 21, 2011
  61. geometry

    The rectangle ABCD is rotated about the side AB. Find the volume of the solid defined by this rotation. AB = DC = 4cm AD = CB = 2cm

    asked on January 9, 2011
  62. physics

    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
  63. calculus

    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
  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. 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
  66. math

    A drawing has a scale of 1/4" = 1'. A window in that drawing measures 2' x 4'. What would be the size of this window on the drawing? A. 1/2" x 1/4" B. 1" x 2" C. 1/2" x 1" D. 3/4" x 1" I think it's A. Is that correct?

    asked on October 22, 2018
  67. 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
  68. calc

    Given power series ∞ ∑ (2x+5)^n / n4^n, determine the following. n = 1 A. Find the center point for the series. B. Find the radius of convergence. C. Determine the interval of convergence

    asked on April 26, 2018
  69. math

    The sum of the first 9 terms of an arithmetic series is 144, and the sum of the first 14 terms is 329. Find the first 4 terms of the series.

    asked on January 23, 2017
  70. 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
  71. 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
  72. 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
  73. Ochem

    Write the equation for the reaction that occurs when sodium carbonate is added to the mixture of the reaction and water (hint: a gas is evolved). This is for benzocaine experiment

    asked on October 4, 2015
  74. Organic Chemistry

    Write the equation for the reaction that occurs when sodium carbonate is added to the mixture of the reaction and water (hint: a gas is evolved). This is for benzocaine experiment

    asked on October 4, 2015
  75. Organic Chem 2

    Write the equation for the reaction that occurs when sodium carbonate is added to the mixture of the reaction and water (hint: a gas is evolved). This is for benzocaine experiment

    asked on October 4, 2015
  76. math

    prove that: 4cosec2ACot2A=cosec^2A - sec^2A

    asked on May 6, 2015
  77. chemistry

    What amount of carbon dioxide is produced per kJ of heat produced in burning ethene, C2H4?

    asked on January 23, 2015
  78. maths

    What is the maximum number of cubes with a side of length 1/3 that can fit inside a cube with a side of length 1 ? 1.3 2.9 3.18 4.27

    asked on August 11, 2014
  79. math

    A compact disc is placed in a player that randomly selects and plays songs from the disc.The compact disc contains 3 ballads, 4 instrumental pieces,X dance tracks and no other pieces.If the probability that the first song played will be a ballad is

    asked on July 24, 2014
  80. Math

    Find the discount (ordinary interest) and proceeds on a promissory note for $2,000 made by Barbara Jones on February 10, 2007, and payable to First State Bank on August 10, 2007, with a discount rate of 9%.

    asked on July 4, 2014
  81. 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
  82. 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
  83. 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
  84. Chemistry

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

    asked on November 10, 2012
  85. 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
  86. chemistry

    what is the formula of iron III tannate?

    asked on October 16, 2012
  87. 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
  88. math

    Find digits A and B in the number below so the folling condition are true. The 5-digit number must be divisible by 4. The 5-digit number must be divisible by 9. Digit A cannot be the same as Digit B. 12A3B Explain the steps you followed to solve the

    asked on December 21, 2011
  89. Biology

    Which functional group is most likely to be responsible for an organic molecule behaving as a base (-OH donator / H+ acceptor)? A. Phosphate B. Amino C. Hydroxyl D. Carbonyl E. Carboxyl

    asked on November 6, 2011
  90. Biology

    There are 20 amino acids that cells use to build the numerous amounts of proteins that are essential for life. If a protein molecule consisted of 100 amino acids, how many combinations are possible? What is the probability that out of the total possible

    asked on November 6, 2011
  91. Algebra 2

    When x² - 3x + 2k is divided by x + 2, the remainder is 7. Find the value of k. Use synthetic division to do so.

    asked on October 28, 2011
  92. Algebra 2

    Solve using linear combinations. x - 5y = 6 3x + 4y = 18 What are linear combinations?

    asked on October 3, 2011
  93. Chemistry

    What is the ratio of carbon atoms to hydrogen atoms in the compound 2CH2 = C2H4? A. 1 to 9 B. 9 to 1 C. 3 to 6 F. 6 to 3

    asked on May 10, 2011
  94. Pre-Calculus Vectors

    Let u = 2i − j, v = −i + j. Find 2u - 3v.

    asked on April 18, 2011
  95. 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
  96. 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
  97. Chemistry

    Redox titrations are used to determine the amounts of oxidizing and reducing agents in solution. For example, a solution of hydrogen peroxide, , can be titrated against a solution of potassium permanganate, . The following equation represents the reaction:

    asked on September 18, 2010
  98. research evaul 342

    If the coefficient of correlation is –0.81, then the percentage of the variation in y that is explained by the regression line is 81%. A. True B. False

    asked on July 27, 2010
  99. 8th grade

    Direct Variation: when you have a job that pays an hourly wage, the amount you earn varies directly with the number of hours you work. Suppose you earn $7.10/ hour working at the library.

    asked on October 3, 2009
  100. 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


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