Popular questions and responses by jennifer
  1. physics

    An electron ( mass = 9.11×10−31 kg) leaves one end of a TV picture tube with zero initial speed and travels in a straight line to the accelerating grid, which is 1.85 cm away. It reaches the grid with a speed of 2.95×10^6 m/s . (You can ignore the

    asked on May 19, 2012
  2. Calculus

    An OPEN box has a square base and a volume of 108 cubic inches and is constructed from a tin sheet. Find the dimensions of the box, assuming a minimum amount of material is used in it's construction. HINT: the goal is to minimize the surface are of the

    asked on May 14, 2013
  3. Chemistry

    What is the name of the product formed by the reaction of propylide ion and 2-chloropropane? I'm having problem because I don't know the formula of propylide ion.

    asked on June 5, 2008
  4. Math

    Three individuals form a partnership and agree to divide the profits equally. X invests $4,500, Y invests $3,500 and Z invests $2,000. If the profits are $1,500, how much less does X receive than if the profits were divided in proportion to the amount

    asked on April 25, 2012
  5. Utech

    The 6th term of an A.P is twice the third and the first term is 3. Find the common difference and the 10th term.

    asked on May 1, 2012
  6. Physics

    You are walking around your neighborhood and you see a child on top of a roof of a building kick a soccer ball. The soccer ball is kicked at 41° from the edge of the building with an initial velocity of 21 m/s and lands 59 meters away from the wall. How

    asked on October 10, 2013
  7. Math

    If BC = 8 , AB = 24 , DC = 48 then BE equals ?

    asked on June 30, 2020
  8. Dennis

    How many ways can the letters of the word HAPPINESS be arranged. If H must start the word, N must end the word and the P's must be separated? [question from the topic FACTORIAL,PERMUTATION AND COMBINATION ]

    asked on May 29, 2015
  9. Math

    The ratio of the measures of the angle of a triangle are 1:3:5. The measures of the largest degrees is? I need this like as soon as possible

    asked on June 30, 2020
  10. Math

    The maximum weight M that can be supported by a beam is jointly proportional to its width w and the square of its height h, and inversely proportional to its length L. a. Write an equation that expresses this prportionality b. Determine the constant of

    asked on March 20, 2010
  11. Survey of Math

    A math class contains 7 females (three of whom speak French and the rest speak only English),and 12 males (two of whom speak French and the rest speak only English). a) A student in the class is chosen at random. If you're told the student is female, what

    asked on February 1, 2018
  12. Statistic 103

    The average teachers salary in Connecticut( ranked first among states) is $57,337. suppose that the distribution of salaries is normal with a standard deviation of $7500. What is the probability that a randomaly selected teacher makes less than $52,000 per

    asked on April 13, 2011
  13. Mathematics

    Solve to the nearest degree the size of each angle of a regular heptagon

    asked on June 22, 2020
  14. Math

    If a baseball is projected upward from ground level with an initial velocity of 64 feet per second, then its height is a function of time, give by g(t)= -16^2 + 64t. What is the maximum heigh reached by the ball?

    asked on June 18, 2012
  15. Physics

    A force F1 of magnitude 6.90 units acts on an object at the origin in a direction θ = 54.0° above the positive x-axis. (See the figure below.) A second force F2 of magnitude 5.00 units acts on the object in the direction of the positive y-axis. Find

    asked on September 20, 2015
  16. Impulse and Momentum

    A bullet of mass m is fired at speed v0 into a wooden block of mass M. The bullet instantaneously comes to rest in the block. The block with the embedded bullet slides along a horizontal surface with a coefficient of kinetic friction . What is the

    asked on March 1, 2015

    Mg(s) + FeCl2(aq) → MgCl2(aq) + Fe(s). IS THE IRON(II) ION OXIDIZED?

    asked on February 22, 2017
  18. math

    A rectangular field is to be enclosed on four sides with a fence. Fencing costs $8 per foot for two opposite sides, and $2 per foot for the other sides. Find the dimensions of the field of area 900 ft2 that would be the cheapest to enclose.

    asked on April 10, 2015
  19. pre calc

    Find the exact value of sin(x-y) if sinx=-3/5 in Quadrant III and cosy=5/13 in Quadrant I.

    asked on May 21, 2013
  20. Trig

    From a point A on the ground, the angle of elevation to the top of a tall building is 24.1 degrees. From a point B, which is 600 ft closer to the building, the angle of elevation is measured to be 30.2 degrees. Find the height of the building. PLEASE HELP

    asked on November 11, 2009
  21. Math

    Answers for A clock was exactly on time at noon on Monday. At 2 P.M. on Wednesday, it was 25 seconds slow. At that same rate, how much did it lose in 1/2 hour?

    asked on April 25, 2012
  22. MATH

    Travel Time A company president flew 680 miles one way in the corporate jet but returned in a smaller plane that could fly only half as fast. If the total travel time was 6 hours, find the speeds of the planes. how would I set up this problem?

    asked on September 25, 2008
  23. Math

    We can find the solutions of sin x = 0.6 algebraically. (Round your answers to two decimal places.) (a) First we find the solutions in the interval [0, 2π). We get one such solution by taking sin−1 to get x = ________ (smaller value). The other solution

    asked on April 21, 2016
  24. english

    in general on what stage of the writing process should you spend most of your time a. analyzing your audience b .writing your first draft c prewriting d.revising your material

    asked on August 13, 2014
  25. AP calculus AB

    A spy tracks a rocket through a telescope to determine its velocity. The rocket is traveling vertically from a launching pad located 10 km away. At a certain moment, the spy's instruments show that the angle between the telescope and the ground is equal to

    asked on December 29, 2010
  26. animal science

    Which of the following is true of the function of glucagon? A. Glucagon regulates insulin secretion. B. Glucagon increases glycogen breakdown into glucose. C. Glucagon inhibits glycogen breakdown into gluclose. D. Glucagon regulates somatostatin secretion.

    asked on August 15, 2012
  27. Math

    The path of a satellite orbiting the earth causes it to pass directly over two tracking stations A and B, which are 35 mi apart. When the satellite is on one side of the two stations, the angles of elevation at A and B are measured to be 87.0° and 84.2°,

    asked on June 22, 2016
  28. Statistics

    An experiment consists of first rolling a die and then tossing a coin. How many elements are there in the sample space? 12 Let A be the event that either a 1, 2, 3 or 4 is rolled first, followed by landing a tail on the coin toss. P(A) = Present your

    asked on March 1, 2020
  29. Math

    A bicyclist is competing in a tournament. He is currently in a very hilly part of the tournament's course. For his current hill, his height in metres over time in minutes is modelled by the function; f(x)=-0.00075x^2-0.5825x+17.269 a) Estimate the

    asked on February 14, 2014
  30. math

    A wire is stretched from the ground to the top of an antenna tower. The wire is 20 feet long. The height of the tower is 4 feet greater than the distance from the tower's base to the end of the wire. Find the height of the tower. 20 ft.= w x.4 = height of

    asked on September 25, 2008
  31. Biology Help PLEASE

    In pea plants, the allele for tall (T) is dominant to the allele for short (t). Which of the following is the percent of offspring that will be tall if a heter In pea plants, the allele for tall (T) is dominant to the allele for short (t). Which of the

    asked on October 25, 2015
  32. Chemistry

    Which of the following molecules has the highest boiling point? CH4,BH3,NH3, SH2?

    asked on October 7, 2012
  33. Mathematics

    Tito Sanchez receives a weekly salary of $400. he also receives a 6% commission on the total dollar amount of all sales he makes. What must his total sales be in a week if he is to make a total of $790?

    asked on September 25, 2012
  34. Chemistry

    Draw the structure of the tripeptide “Asp-Ala-Ile” at pH = 1. Then determine the total charge of the tripeptide. The side chain of each amino acid is shown below in the form at pH = 7. (So when you use them to answer this question, you might need to

    asked on April 27, 2017
  35. Chemistry


    asked on March 7, 2017
  36. chemistry

    During the combustion of 5.00g of octane C8H18, 239.5 kcal is released. Write a balanced equation for the combustion reaction. Are reactants or products favored? What is the sign of change of heat for this reaction? how much energy is released by the

    asked on June 7, 2015
  37. literature

    what lines show alliterations in the poem "Fable for when there's no way out"

    asked on March 30, 2015
  38. Math Pre-Algebra

    5.2 (division sign) 1.25

    asked on September 2, 2012
  39. math

    rectangular roof of hospital has width of 80ft, and area of 16,000sq ft. what is length and perimeter of roof

    asked on November 10, 2011
  40. algebra

    A coffee distributor needs to mix a(n) Organic Free Trade coffee blend that normally sells for $8.30 per pound with a Rift Valley coffee blend that normally sells for $13.90 per pound to create 80 pounds of a coffee that can sell for $10.82 per pound. How

    asked on July 6, 2019
  41. Statistics

    Roulette wheels in Nevada have 38 pockets. They are all numbered 0, 00, and 1 through 36. Of all 38 pockets, there are 18 red, 18 are black, and 2 are green. Each time the wheel is spun, a ball lands in one of the pockets, and each pocket is equally

    asked on April 7, 2016
  42. Physics

    The brakes of a bike (with a person) having a mass of 63 kg, reduces it's velocity from 8.5 m/s to 0 m/s in 3.0 seconds. What is the magnitude of braking force?

    asked on December 5, 2014
  43. Calculus

    Using the four-step process find f(x)= 13 I know it is 0 and how to do the 4-step process, I just don't know how to do it without an exponent. Help please!

    asked on May 15, 2013
  44. Calculus Based Physics II

    An air-filled spherical capacitor is constructed with inner and outer shell radii of 6.4 cm and 16.1 cm, respectively. Calculate the capacitance of the device. The value of the Coulomb constant is 8.98755 × 10 9 N·m^2/C^2 Answer in units of pF

    asked on September 15, 2012
  45. Physics

    In a "Rotor-ride" at a carnival, people are rotated in a cylindrically walled "room." (See Fig. 5-35.) The room radius is 4.6 m, and the rotation frequency is 0.7 revolutions per second when the floor drops out. What is the minimum coefficient of static

    asked on October 4, 2009
  46. Literature

    What does flat, static, round, and dynamic characteristics mean? And also what does omniscient mean?

    asked on March 19, 2009
  47. Chemistry

    N2(g) + 3 H2(g) → 2 NH3(g) [balanced] If 5.42 g of nitrogen gas are reacted with 5.42 g of hydrogen gas, which of the reactants is the limiting reactant? Use the molar mass data below if necessary. Molar mass of N2 = 28.02 g/mol Molar mass of H2 = 2.02

    asked on February 20, 2017
  48. algebra homework help

    The sum of two consecutive integers is 285 is 18 and 54 correct

    asked on October 11, 2016
  49. filling procedue

    You have an inactive file. How do you decide if it must be sent to the archives or if it should be destroyed? A. Check the records retention schedule. B. Ask your employer. C. Ask the person who asked to have it filed. D. Make a decision on your own. My

    asked on October 1, 2015
  50. music

    What is denoted by "Caribbean music in a new mode."

    asked on April 10, 2015
  51. physics

    Assuming the Earth's magnetic field averages about 0.50×10−4 T near Earth's surface, estimate the total energy stored in this field in the first 15km above Earth's surface. The radius of Earth is 6380 km.

    asked on March 23, 2014
  52. Math

    For $1.80 a grocer buys a case of fruit which contains 12 dozen. She knows that tow dozen will spoil before she sells them. At what price per dozen must she sell the good ones to gain 1/3 of the whole cost?

    asked on April 25, 2012
  53. math

    When m is divided by 7, the remainder is 2. What is the remainder when 4m is divided by 7? Please give me an explanation and not just the answer! Thankss:)

    asked on July 20, 2011
  54. Physics - Re-post

    A .20 kg ball is attached to a vertical spring. The spring constant is 28 N/m. The ball is supported initially so that the spring is neither stretched or compressed, is released from rest. How far does the ball fall before brought to a momentary stop by

    asked on January 18, 2011
  55. Math

    What effect will an outlier have on a confidence interval that is based on a small sample size? A) The interval will be smaller than an interval without the outlier. B) The interval will be the same with or without the outlier. C) The confidence interval

    asked on November 28, 2009
  56. college algebra

    You need a 45% alcohol solution. On hand, you have a 350 mL of a 15% alcohol mixture. You also have 70% alcohol mixture. How much of the 70% mixture will you need to add to obtain the desired solution? You will need ________ mL of the 70% solution

    asked on July 6, 2019
  57. algebra

    how would I solve for this L = 2πrh; solve for r.

    asked on October 11, 2016
  58. Math

    Write the first trigonometric function in terms of the second for θ in the given quadrant. tan(θ), cos(θ); θ in Quadrant IV I believe to start this is 1/cos^2*theta. Am I write? If not, can you please help me?!

    asked on April 14, 2016
  59. Math

    Roulette wheels in Nevada have 38 pockets. They are all numbered 0, 00, and 1 through 36. Of all 38 pockets, there are 18 red, 18 are black, and 2 are green. Each time the wheel is spun, a ball lands in one of the pockets, and each pocket is equally

    asked on April 7, 2016
  60. Spring Physics

    A block of mass 3 kg is hung from a spring, causing it to stretch 9 cm at equilibrium. The 3 kg block is then replaced by a 4 kg block, and the new block is released from the position shown below, at which point the spring is unstretched.WHAT IS THE LENGTH

    asked on February 23, 2016
  61. Algebra II

    what is an equation of a parabola with the given vertex and focus? Vertex: (-2,5); focus: (-2,6)

    asked on February 26, 2015
  62. probability;math

    A card is chosen at random from a deck of 52 cards It is then replaced and then a second card is chosen.What is the probability of choosing a jack and then an eight?

    asked on October 5, 2014
  63. Algebra

    What are the foci of the hyperbola with equation 16y^2-9x^2=144

    asked on May 19, 2014
  64. Finance

    Joshua borrowed $2,300 for one year and paid $138 in interest. The bank charged him an $15 service charge. If Joshua paid the $2,300 in 12 equal monthly payments, what is the APR? (Round your answer to 1 decimal place

    asked on February 15, 2013
  65. trig

    a 30 foot ladder leans against a wall at a 71 degree angle of elevztion find the distance of a ladder's base to the wall

    asked on December 3, 2011
  66. 2nd grade/math

    How do you find the perimeter of a letter, example I, U, and J? The area for the I is 9 square cm. Do you still count all the sides or what? Any help would be appreciated!

    asked on March 8, 2011
  67. Chemistry

    What element has the final electron configuration as 3s2 3p4?

    asked on December 12, 2010
  68. Math 8

    write an algebraic expression for the nth term of this sequence. 7, 11, 16, 22,... I know what algebraic expression is.

    asked on November 8, 2018
  69. chemistry

    THE QUESTION ASKS TO CALCULATE THE AMOUNT (IN GRAMS) OF CARBON DIOXIDE FROM THE AMOUNT OF SODIUM BICARBONATE THAT YOU USED IN THE REACTION Run 1. The reaction of citric acid and sodium bicarbonate is written as H3C6H5O7(aq) + 3 NaHCO3(aq) → Na3C6H5O7(aq)

    asked on February 28, 2017
  70. Math

    For each pair of functions give a characteristic that the two functions have in common and a characteristic that distinguishes them. a) f(x)=1/x and g(x)=sinx b) f(x)=x and g(x)=[x] c) f(x)=2^x and g(x)=sinx

    asked on February 14, 2014
  71. Math

    A batter hits a baseball straight up into the air. The height of the ball in metres above the ground is given by h(t)=-4.9t^2+23t+2, where t is the number of seconds after the ball is hit. a) What is the average rate of change in the height of the ball

    asked on February 14, 2014
  72. math

    two third of a blueberry pie is left in the refrigerator. If the leftover pie is cut in 6 equal size, which fraction of the original pie is each slice

    asked on March 20, 2013
  73. Algebra

    you trim a large square picture so that you could fit it into a frame. you trim 3 inches from the length and 2 inches from the width. the area of the resulting picture is 56sq in what was the perimeter of the original large square picture?

    asked on March 12, 2013
  74. Chemistry (Stoichiometry)

    Heres a balanced equation: Na2CO3(aq)+2AgNO3 (aq) --> 2NaNO3(aq)+Ag2CO3 (s) From this equation, 10 mL of AgNO3 in this contains 34 grams of AgNO3. Calculate the grams of solid product, Ag2CO3. Part 2: 10 mL of Na2CO3 in this experiment contains 21 grams of

    asked on February 6, 2013
  75. Chemistry

    Write a balance equation for the reaction of nitric acid (HNO3) with each base solution : [1]. NaHCO3, [2]. MgCO3. ( Please include the phases of the substance)

    asked on December 8, 2012
  76. Utech

    The 9th term of an Arithmetic Progression is 8 and the 4th term is 20. Find the first term and the common difference.

    asked on May 1, 2012
  77. algebra

    can you check my answers please? What are the first three terms of the sequence: a1 = 3 and an = 2(an1)2? 2, 8, 18 3, 18, 648 --3, 32, 50 2, 6, 12, 24 What is the 14th term in the sequence: an = 4n + 13? -43 43 __> -69 69 What is the recursive rule for the

    asked on March 22, 2012
  78. Physics

    A ball player hits a home run, and the baseball just clears a wall 17.0 m high located 124.0 m from home plate. The ball is hit an an angle of 35° to the horizontal, and air resistance is negligible. Assume the ball is hit at a height of 1.0 m above the

    asked on November 6, 2011
  79. Chemistry

    In the explosion of a hydrogen filled balloon, 0.50 g of hydrogen reacted with 4.0 g of oxygen to form how many grams of water vapor? (water vapor is the only product)

    asked on September 4, 2011
  80. Algebra

    A lot is in the shape of a right triangle. The shorter leg measures 90 meters. The hypotenuse is 30 meters longer than the length of the longer leg. How long is the longer leg?

    asked on April 22, 2011
  81. algebra 2

    a store is offering a discount of 30% on a suit. There is a sales tax of 6%. A) using a composition of function, represent this situatio in which the discount is taken before the sales tax is applied. the answer is (1.06)(.7x) = .742x B) using a

    asked on January 22, 2011
  82. Physics

    An engineer in a locomotive sees a car stuck on the track at a railroad crossing in front of the train. When the engineer first sees the car, the locomotive is 210 m from the crossing and its speed is 26 m/s. If the engineer’s reaction time is 0.62 s,

    asked on September 15, 2010
  83. Math

    A state university wants to increase its retention rate of 4% for graduating students from the previous year. After implementing several new programs during the last two years, the university reevaluated its retention rate. Identify the Type I error in

    asked on December 5, 2009
  84. Biology

    I have two more questions. What carries secretions for export from cell? How do proteins and other substances get from ER to Golgi apparatus?

    asked on September 27, 2009
  85. general science

    A Compound Containing 3 Atoms Of Carbon And 8 Atoms Of Hydrogen Is Combined In A Reaction With Oxygen Molecules. The Two End Products Of This Equation Are Carbon Dioxide And Water. What Element Should You Look At First In Balancing This Equation?

    asked on August 9, 2009
  86. Chem

    How many grams of dry NH4Cl need to be added to 1.80L of 0.200M solution of ammonia,NH3, to prepare a buffer that has a pH of 8.69? Kb for ammonia is 1.8*10^-5

    asked on April 18, 2009
  87. english - Mrs. Edith Frank

    I have to write a monologue as if I am Edith Frank, Anne Frank's mother. Could you please check for any grammar mistakes and give me comments about it? Is it too serious? Just a few days ago, we were delighted at the news Miep brought us: the war is near

    asked on March 19, 2009
  88. economics

    The hand made snuffbox industry is composed of 100 identical firms, each having short-run total costs given by STC=0.5q^2+10q+5 and short-run marginal costs by SMC=q+10 where q is the output of snuffboxes per day. a. What is the short-run supply curve for

    asked on November 3, 2007
  89. Physics

    Calculate the height that a block of ice at 0°C must be dropped to completely melt upon impact. Assume that all of the initial gravitational potential energy of the block goes into melting the ice. Hmmmm.

    asked on November 5, 2006
  90. Math

    Radioactive​ uranium-235 has a​ half-life of about 700 million years. Suppose you find a rock and chemical analysis tells you that only one sixteenth of the​ rock's original​ uranium-235 remains. How old is the​ rock?

    asked on September 25, 2018
  91. Chemistry

    you have a solution of 0.1 m KCN and a solution of 0.1 m of HF what is the buffer?

    asked on March 16, 2017
  92. chemistry

    An empty beaker weighs 39.17 g. a) When completely filled with water, the beaker and its contents have a total mass of 406.25 g. What volume does the beaker hold? Use d =1.00 g/mL as the density of water. for A i got 367.08 but I don't know for this b) How

    asked on March 6, 2017
  93. Math

    Brianna deposits $150 at the end of each quarter into an account that pays 8% compounded quarterly for 9 months. calculate the amount in the account at the end of the period. I did this .. 150[(1 + .08)^9x3 – 1] 3 divide the top half by .08/3 =

    asked on April 30, 2016
  94. literature

    why is the poem "Fable for when there's no way out" a good example of "seeing common things in an uncommon way?"

    asked on March 30, 2015
  95. Impulse and Momentum

    In the game of billiards, all the balls have approximately the same mass, about 0.20 kg. The cue ball moving west with a speed of 4.5m/s strikes another ball at rest. After the collision the cue ball moves at an angle of 55degree north of west and the

    asked on March 1, 2015
  96. Algebra

    You are walking away from home at a constant velocity of 5 km per hour. The first landmark you see is your favorite fountain which happens to be 2 km from your house. Which of the following sequences describes the distances you cover at internals of one

    asked on July 15, 2014
  97. math

    All 30 of the students in a mathematics class attended class on Monday. On Tuesday only 22 students attended. What was the percent decrease?

    asked on June 24, 2014
  98. math help

    I am a closed shape made of 6 line segments. I have 2 angles less than a right angle and no right angles. What shape am I? Draw an example in the workspace.

    asked on March 19, 2014
  99. Chemistry H.

    Indium has two naturally occurring isotopes and an atomic mass of 114.818 amu. In- 113 has a mass of 112.904 amu and an abundance of 4.3%. What is the identity and percent abundance of indium's other isotope. I am very confused on how do I set up this

    asked on September 23, 2012
  100. math 102

    what number multiplied by the numerator and added to the denominator of the fraction 2/5 makes the resulting fraction 8/9?

    asked on March 28, 2012


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