Popular questions and responses by D
  1. Math

    Jeremy loves right triangles that have side length 1. In fact, he loves to combine them so that the hypotenuse of one becomes the leg of the next. If the longer leg of the first triangle is sqrt 11, what will be the hypotenuse of the 2014th triangle? I

    asked on November 14, 2016
  2. Math (Updated)

    F(x)=9x^3+2x^2-5x+4 and g(x)=5x^3-7x+4. what is f(x)-g(x)? Show all of your steps and write your finial answer in factored form.

    asked on April 10, 2018
  3. Calculus 1

    If you have 280 meters of fencing and want to enclose a rectangular area up against a long, straight wall, what is the largest area you can enclose?

    asked on November 22, 2011
  4. Calculus, math

    Consider the function below. (If an answer does not exist, enter DNE.) f(x) = e^arctan(7x) I did the problem but I have mistakes on some items. I think the ff. are right: Vertical Asymptote: x = DNE Horizontal Asymptote: y = e^-(pi/2), e^(pi/2) Interval

    asked on April 2, 2020
  5. Finance math

    9. Compute the present value of $4,000 paid in five years using the following discount rates: 10 percent in year 1, 2 percent in year 2, 12 percent in year 3, and 9 percent in years 4 and 5.

    asked on October 12, 2014
  6. U.S. History

    1. What would this image convey to someone from the early-1900s about about the suffrage movement? (image: "early-1900s women's suffrage painting"-- this has a sign on it that says "official program women's suffrage procession" a person riding a horse and

    asked on May 27, 2016
  7. Finance

    1. What is an entrepreneur? (1 point) a sole proprietorship a corporation one who opens a new business a bank that loans money 2. Which of the following is the best definition of probable operating costs? (1 point) Amount of money required to start a

    asked on April 15, 2018
  8. physics

    (c) Tube (c) is again filled with water. A1 and A2 are the same as in part (b). Two pistons apply different forces to the water in the tube so that the water in the right side of the tube is a height h = 0.43m above the height of the water in the left side

    asked on May 1, 2011
  9. Chemistry

    Consider the reaction: 2CH4(g) + 3O2(g) + 2NH3(g) --> 2HCN(g) + 6H2O(g) If 203.5 g NH3 is reacted with excess CH4 and O2, what mass in grams of HCN can be produced?

    asked on April 30, 2017
  10. math

    You flip a fair coin 10,000 times. Approximate the probability that the di fference between the number of heads and number of tails is at most 100.

    asked on February 28, 2017
  11. physics

    A light, rigid rod l = 5.55 m in length rotates in the xy plane about a pivot through the rod’s center. Two particles of masses m1 = 9.8 kg and m2 = 2.4 kg are connected to its ends find the moment of inertia

    asked on February 12, 2015

    parallelogram with a side of 40in a base of 36in and a height of 33in. WHAT IS THE AREA?

    asked on October 16, 2013
  13. math

    The owner of a service station receives a loan of $8,500 at 10.5% for 7 months. Find the amount of simple interest

    asked on September 20, 2013
  14. German

    Ich schminke mich lieber als er sich. is this incorrect or correct?

    asked on March 1, 2013
  15. Physics

    An astronaut in his space suit and with a propulsion unit (empty of its gas propellant) strapped to his back has a mass of 146 kg. The astronaut begins a space walk at rest, with a completely filled propulsion unit. During the space walk, the unit ejects

    asked on November 13, 2012
  16. chem

    Magnesium burns in air to produce magnesium oxide, MgO, and magnesium nitride, Mg3N2. Magnesium nitride reacts with water to give ammonia. Mg3N2(s) + 6 H2O(l) → 3 Mg(OH)2(s) + 2 NH3(g) What volume of ammonia gas at 24°C and 753 mmHg will be produced

    asked on March 6, 2011
  17. Math

    Given line AB, explain how to construct a square with sides of length AB.

    asked on October 10, 2018
  18. chemistry

    Given a 1.00 L solution that is 0.60 M HF and 1.00 M KF, calculate the pH after 0.080 mol NaOH is added, and calculate the pH after 0.24 mol HCl is added to the original solution.

    asked on April 17, 2017
  19. precalc

    write a linear equation to fit each situation or description. 1) the line through (2,4) parallel to the x axis. 2) the line through (2,4) perpendicular to the x axis. 3) the line through (3,1) perpendicular to y=4x-3. 4) the line through (-2,5) parallel to

    asked on August 31, 2015
  20. physics

    A light, rigid rod l = 5.55 m in length rotates in the xy plane about a pivot through the rod’s center. Two particles of masses m1 = 9.8 kg and m2 = 2.4 kg are connected to its ends. Determine the angular momentum of the system about the origin at the

    asked on February 12, 2015
  21. Finance kennedy king

    4. A firm's net income last year was $1.5 million. Its net income grew 5 percent during the last 5 years. If that growth rate continues, how long will it take for the firm's net income to double?

    asked on October 13, 2014
  22. Math

    A couple needs $15,000 as a down payment for a home. If they invest the $10,000 they have at 8% compounded quarterly, how long will it take for the money to grow into $15,000?

    asked on October 9, 2013
  23. chemistry

    Iwish to prepare 3% NH3 from 20ml strong NH4OH and 180ml H2O.Can you help me?

    asked on February 7, 2013
  24. Physics

    Well, hard to imagine the picture, but by the description the wires each side are at 16 deg. back on each side of the tooth, i.e. each at 16 deg. to the face of the tooth. Each has 18N. tension. (sin 16) x 18 = 4.9608N. Double it (2 wires), = 9.9216N. back

    asked on October 25, 2012
  25. geometry

    Given the quadrilateral ABCD with the following vertices A(-4, 0), B(10, 0), C(10, 10), and D(0, 14), find its area.

    asked on June 6, 2011
  26. geometry

    In ΔABC, angleB = 46°, angleC = 28° and AB = 50. Find BC (to the nearest hundredth).

    asked on June 6, 2011
  27. AP Chemistry

    The molar mass of a volatile liquid (one which vaporizes easily) can be determined by a the DUMAS METHOD.' In this process a small amount of the liquid (a few drops) is placed in a clean flask. The mouth of the flask is covered with a piece of foil that

    asked on November 4, 2010
  28. math

    If the probability that an identified hurricane will make a direct hit on a certain stretch of beach is 0.10, what are the odds in favor of a direct hit? a. 1:10 b. 1:9 c. 9:1 d. 8:1

    asked on September 18, 2010
  29. adult education CSJ

    What are the steps leading to a trail, the importance of the Sisxth Amendment, The process of jury selectin and the procedures of ajury trail. The fundamental philosphies surround the purpose of sentencing. The factors that go into the determination of

    asked on December 15, 2008
  30. accounting

    how do i record adjusting and closing entries for a service business? how do i do a post-closing trial balance?

    asked on December 3, 2008
  31. Math

    Find the two square roots of 5-12i in the form a+bi, where a and b are real. Mark on an Argand diagram the points P and Q representing the square roots. Find the complex number of R and S such that PQR and PQS are equilateral triangles. How do you do the

    asked on March 14, 2020
  32. Math

    a. Do some research and find a city that has experienced population growth. Determine its population on January 1st of a certain year. Write an exponential function to represent the city’s population, y, based on the number of years that pass, x after a

    asked on March 11, 2018
  33. chemistry

    Please balance magnesium sulfate and iron III acetate

    asked on March 6, 2018
  34. Science

    How is velocity different from speed?

    asked on March 1, 2018
  35. math

    Kevin had $15 with him. His mother gave him $10 and his father also gave him some money. After this, he had a total of $37 with him. How much money did his father give him? Write an equation with a variable and state what the variable represents.

    asked on May 24, 2017
  36. Geometry

    1.1.Determine whether the regular pentagon has reflection symmetry, rotation symmetry, both, or neither. If it has reflection symmetry, state the number of axes of symmetry. If it has rotation symmetry, state the angle of rotation. For each type of

    asked on October 17, 2014
  37. engineering mechanics

    the greatest and least resultant of two forces are respectively 17 KN and 5 KN. determine the angle between two force when their resultant is root 144 KN.

    asked on September 14, 2014
  38. Stats

    the average placement test score of a sample of 64 students out of 1000 registered at a community college is 70 with a standard deviation of 15. Construct a confidence interval with a 5% chance of error.

    asked on April 6, 2014
  39. Physics

    A 26.2 g marble sliding to the right at 62.0 cm/s overtakes and collides elastically with a 13.1 g marble moving in the same direction at 15.5 cm/s. After the collision, the 13.1 g marble moves to the right at 77.5 cm/s. Find the velocity of the 26.2 g

    asked on January 8, 2014
  40. physics

    You walk 51 m to the north, then turn 30° to your right and walk another 45 m. How far are you from where you originally started?

    asked on November 14, 2013
  41. physics

    a woman weighs Fg=650 when standing on a stationary scale. The woman is riding an elevator from the 1st floor to the 10th floor. As the elevator approaches the 10th floor, it decreases its upward speed from 9 m/s to 1 m/s in a time interval of 1 second.

    asked on November 2, 2013
  42. health

    Whats the largest bone in your body?

    asked on October 16, 2013
  43. Calculus

    Finf (dy/dx) y=(1+28x^3)f(x)+(6x)g(x)(x^4+5x+7)+(6x)g(x)(x^4+5x+7)-(e^x+7x^4)f(x)+3x^2g(x)(4x^3+5+7)/((x^4+5x+7)^2

    asked on October 6, 2013
  44. stats

    suppose that a population of people is 1200. .25 of the population is white. we take a random sample of 100 people. What is the probabilit that more than .29 of these people are white?

    asked on April 16, 2013
  45. Chemistry

    What preperation produces a 2.0 Mole solution of C6H12O6? a) 90.0 grams of C6H12O6 dissolved in 500.0 mL of solution b) 180.0 grams of C6H12O6 dissolved in 1000mL of solution c) 90 Grams of C6H12O6 dissolved in 1000mL of solution D) 180.0 Grams of C6H12O6

    asked on December 19, 2012
  46. Physics

    A baseball (m = 135 g) approaches a bat horizontally at a speed of 40.4 m/s (90 mi/h) and is hit straight back at a speed of 45.7 m/s (102 mi/h). If the ball is in contact with the bat for a time of 1.00 ms, what is the average force exerted on the ball by

    asked on November 18, 2012
  47. Physics

    The drawing shows a circus clown who weighs 710 N. The coefficient of static friction between the clown's feet and the ground is 0.49. He pulls vertically downward on a rope that passes around three pulleys and is tied around his feet. What is the minimum

    asked on October 25, 2012
  48. statistics

    In a survey of 400 college students, 40 were left-handed. Treating the sample as if it were random and using 0.015 as the standard deviation of the sampling distribution of the sample proportion, what is the lower bound of a 95% confidence interval for the

    asked on May 18, 2012
  49. World Civ

    What were the social and administrative foundations of the absolute power of Ming Quing emperors?

    asked on February 1, 2012
  50. Math

    Jake says that adding 0 does not change a sum. Is he correct? explain.

    asked on September 20, 2011
  51. Chemistry

    When 1.0 g of gasoline burns, it releases 11 kcal of heat. The density of gasoline is 0.74 g/mL a) How many megajoules are released when 3.0 of gasoline burns? b) If a television requires 150 kJ/h to run, how many hours can the television run on the energy

    asked on September 12, 2011
  52. Chemistry

    A sample of 0.43 moles of a metal M reacts completely with excess chlorine to form 18.23 grams of MCl. How many moles of Cl are in the sample of MCl that forms?

    asked on July 30, 2011
  53. calculus

    A missile is fired at an angle of 75 from the horizontal. At one point, its speed was 900 mph. Find its horizontal velocity in miles per minute

    asked on April 1, 2011
  54. Physics Mechanics

    A banked circular highway curve is designed for traffic moving at 57 km/h. The radius of the curve is 211 m. Traffic is moving along the highway at 48 km/h on a rainy day. What is the minimum coefficient of friction between tires and road that will allow

    asked on February 20, 2011
  55. chemistry

    Which of the following properties increase with increasing atomic number for fluorine and chlorine? I. melting point of the elements (yes) II. boiling point of the hydrogen halides i'm not sure about II because HF has the highest boiling point but fluorine

    asked on December 31, 2010
  56. chemistry

    Which of the following properties increase with increasing atomic number for fluorine and chlorine? I. melting point of the elements (yes) II. boiling point of the hydrogen halides i'm not sure about II because HF has the highest boiling point but fluorine

    asked on December 31, 2010
  57. chemistry

    At 100 degrees celsius, the ratio of the average kinetic energy of oxygen molecules, O2, to the average kinetic energy of methane molecules, CH4, is: A) 4:1 B) 1:4 C) 1:2 D) 1:1 I think it's D because the kelvin temperature is the same for both collection

    asked on December 31, 2010
  58. algebra

    how can 2 boys weighing 100lbs each and a man weighing 200lbs cross the river in a boat that only holds 200lbs safely?

    asked on November 20, 2010
  59. Calculus

    A particle moves in a straight line with velocity t^-2 - 1/9 ft/s. Find the total displacement and total distance traveled over the time interval [1,4]. I found out that the total displacement is .4116 But I cannot find the total distance traveled.

    asked on November 11, 2010
  60. AP Chemistry

    What is the Dumas Method in regards to the molas mass of a gas?

    asked on November 4, 2010
  61. Chem

    5. The LC50 for fluorine is 0.29 mg/m3. What is this in ppm at 25 oC and 1 atm pressure? How does this compare to the PEL?

    asked on October 17, 2010
  62. College Chem

    How many liters of carbon dioxide at 20 oC and 750 torr are produced when one gallon of toluene is burned? C7H8 + 9O2 ==> 7CO2 + 4H2O 1 gallon toluene = about 3,785 mL density = about 0.867 g/mL mass toluene = 3785 mL x 0.867 g/mL = 3282 grams. moles

    asked on October 4, 2010
  63. Fundamentals of Cost Analysis (Economic Analysis)

    What would be the present value of an item that has a salvage value of $25,000 at the end of five years? Assume a discount rate of 3.8% for an end-of-year factor. Carry calculations to four decimal places.

    asked on August 19, 2010
  64. home economic

    Which of the following gadgets is best for making a soft-shell shape out of butter? A. A curler C. A masher B. A peeler D. A pick

    asked on July 13, 2010
  65. begining algebra

    One side of a triangle is three times the shortest side. The third side is 7 feet more than the shortest side. The perimeter is 62 feet. Find all three sides.

    asked on February 10, 2010
  66. Criminal Justice 200

    What are the steps to take for pretrail?

    asked on December 13, 2008
  67. Criminal Justice 200

    What would a person consider two main functions of criminal law. How can you identify one justification and excuse defense?

    asked on November 30, 2008
  68. CHEM

    How do I work the following question? I found the amu of CaCO3=101.0872g/mol; 2HCL=72.92128g/mol; H2O=18.1582g/mol;CO2=44.0098g/mol; and, CaCl2=110.9834g/mol. You carefully weigh out 10.00g of powder and add it to 40.50g of solution. You notice bubbles as

    asked on October 1, 2007
  69. Math


    asked on April 23, 2020
  70. Math

    Given the proportion a/b =8/15, what ratio completes the equivalent proportion a/8 =? How do I do this?

    asked on May 27, 2019
  71. health

    what is an inflammation of the mucous membrane if the bronchial tubes caused by smoking

    asked on May 7, 2019
  72. Sociology

    So I am genuinely interested in what other people's opinions are on how racial discrimination might affect economic stratification in the US?

    asked on April 14, 2019
  73. Spanish

    What are least two different ways you can ask what you or someone is like in Spanish?

    asked on October 2, 2018
  74. Photographer

    Describe the post secondary training or education required for that field.... what does that mean? What are some examples?

    asked on May 25, 2018
  75. English Research Paper *Edit*

    What does everyone think of these questions: What are the positive effects music has on the mind? Can those positive effects change a mindset on something / the way you think? Can music calm the mind? After a bad day, or even deescalate a situation. How

    asked on May 24, 2018
  76. History

    One of the impulses of the constitution of 1845 a physical responsibility Former slaves importance of high taxes increase state debt Why was he Texas her station of 1845 twice as long as the one written before it select only two it decreased a large number

    asked on April 24, 2018
  77. Math (3 of 3) *Final*

    8. Factor 5t² - t -18 9. Factor 25x² - 9 10. Factor 9t² + 12t + 4

    asked on April 2, 2018
  78. Math (2 of 3)

    4. Find the GCF of the polynomial, then factor. 8v⁶ + 2v⁵ - 10v⁹ 5. Simplify the product of the binomial [5t + 4]² 6. A rectangle has dimensions 3x  1 and 2x + 5. Write an expression for the area of the rectangle as a product and in standard

    asked on April 2, 2018
  79. Math (1 of 3)

    1. Simplify and write in standard form. Then, classify the polynomial by degree and number of terms [5x³ + 3x² - 7x + 10] + [3x³ - x² + 4x - 1] 2. Simplify and write in standard form. Then, classify the polynomial by degree and number of terms. [9w -

    asked on April 2, 2018
  80. Mathematics 1 of 3

    1. Simplify and write in standard form. Then, classify the polynomial by degree and number of terms. (5x^3 + 3x^2 - 7x + 10) - (3x^3 - x^2 + 4x - 1) 2. Simplify and write in standard form. Then, classify the polynomial by degree and number of terms. (9w -

    asked on March 15, 2018
  81. Math

    Determine if the number is written in scientific notation. If not, explain; 3 x 100⁻⁶. A. No; it is not written as a power of 10. B. No; the first factor is not a number between 1 and 10. C. Yes; the number is written in scientific notation. I'm almost

    asked on March 14, 2018
  82. Math

    How would I do these? 6. The speed of sound is approximately 1.2 × 10³ km/h. How long does it take for sound to travel 7.2 × 10² km? Write your answer in minutes. 7. Evaluate the function below over the domain {-1, 0, 1, 2}. As the values of the domain

    asked on March 5, 2018
  83. Science (Last question of these)

    Ball A, with a mass of 10kg, is moving to the right at 20 m/s. Ball B is moving to the left at 20 m/s. Upon collision, Ball B comes to a standstill, and Ball A moves to the left at twice its original speed. What is the mass of ball B? How do I do this?

    asked on February 28, 2018
  84. Science

    Ball B, with a mass of 30kg, is moving to the left at 10 m/s. With what velocity should Ball A, with a mass of 10kg, move to the right and collide with 2, so that ball A rebounds with a velocity of 30 m/s, and Ball B with velocity of 10 m/s, after the

    asked on February 28, 2018
  85. Science

    Ball A, with a mass of 20 kg, is moving to the right at 20 m/s. At what velocity should Ball B, with a mass of 40 kg, move so that they both come to a standstill upon collision? How do I solve this?

    asked on February 28, 2018
  86. chemitry

    Liquid sodium is being considered as an engine coolant. how many grams of liquid sodium (minimum)are needed to absorb 3.60 MJ of energy(in the form of heat) if the temperature of the sodium is not to increase by more than 10.0 degree celcius? use Cp=30.8

    asked on January 24, 2018
  87. social studes

    Which of the following was not a sign of the breakdown of royal government in Georgia?

    asked on November 22, 2017

    Simplify the expression: 15 − 3[2 + 6(−3)]

    asked on September 28, 2017
  89. Science

    PLEASE DO NOT THINK I AM CHEATING AND ASKING FOR ANSWERS. DO NOT LECTURE ME, I AM SIMPLY ASKING WHAT IN THE HELL THIS MEANS: Collecting and Analyzing Data There are two types of observations: qualitative and quantitative. Qualitative observations use words

    asked on August 28, 2017
  90. Math

    If centripetal force acts towards the center of a circle, why do we get pushed to the outside of the circular path when rounding a curve? What is responsible for this sensation? Some have erroneously referred to this sensation as a centrifugal force. What

    asked on June 20, 2017
  91. math

    As part of a school science project, Jacob bought some bulbs for a total of $18. The cost of each bulb was $3. How many bulbs did Jacob buy? Write an equation with a variable and state what the variable represents.

    asked on May 24, 2017
  92. ELA plez help

    what statement is true about dialogue? 1.The words each character says are enclosed by quotation marks 2. the words each character says appear next to the characters name. 3. The words that the main character says appear in italics or brackets 4. the words

    asked on March 14, 2017
  93. physics

    A crate with a mass of (111.5) kg is lifted by a crane. If the crate is accelerating upward at (2.7) m/s2, what is the tension in the cable? Give your answer in newtons (N) and with 3 significant figures.

    asked on February 15, 2017
  94. Math

    If a water bottle holds 1.5 litters of water if I open a new bottle an drink half how much water is left

    asked on January 26, 2017
  95. finance

    the school you would like to attend costs 100,000, to help finance your education you need to choose whether or not to sell your 1000 shares of Apple stock , 1000EE Savings Bonds (with denominations and 4.25% coupon rate) that are five years from their

    asked on December 20, 2016
  96. Algebra 1- Urgent

    Part A: Sam rented a boat at $225 for 2 days. If he rents the same boat for 5 days, he has to pay a total rent of $480. Write an equation in the standard form to represent the total rent (y) that Sam has to pay for renting the boat for x days. (4 points)

    asked on December 17, 2016
  97. Trigonometry

    a line which passes through the origin contains point A (-0.714, 0.700) . find the gradient of the line and the angle formed with respect to the positive x-axis in Degrees

    asked on March 30, 2016
  98. physics

    Find the time constant (T) for the RC circuit with an open switch given t = 10 ms 50% of Qmax charge T = ? Q = CV (1-e -t/T)

    asked on February 25, 2016
  99. english

    bad impact on their lifestyle give me a better word then bad please

    asked on January 19, 2016
  100. Chemistry

    Pb + S yield FeS

    asked on November 1, 2015


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