Popular questions and responses by HELP
  1. math

    I need help!!!! Write an expression describing all the angles that are coterminal with 127° . (Please use the variable "k" in your answer)

    asked on June 27, 2019
  2. Physics Help Please! Check the answer

    an athlete stretches a spring an extra 40.0 cm. how much energy has he transferred to the spring, if the spring constant is 5286.0 N/m? Us= 1/2kx^2 =1/2(5286.0)(.40)=1057.2 J Thanks!

    asked on November 6, 2014
  3. math

    A standard deck of cards has 52 cards divided into 4 suits, each of which has 13 cards. Two of the suits ($\heartsuit$ and $\diamondsuit$, called `hearts' and `diamonds') are red, the other two ($\spadesuit$ and $\clubsuit$, called `spades' and `clubs')

    asked on November 2, 2019
  4. world history

    Which option most accurately explains the impact of the First Agricultural Revolution? Early humans ate more foods high in protein and low in starch and grains. Early humans created new social cultures, including laws and inventions. Early humans began to

    asked on April 26, 2019
  5. Math

    Assume that women’s heights are normally distributed with a mean of 63.6inches and a standard deviation of 2.5inches. If 90 women are randomly selected, find the probability that they have a mean height between 62.9inches and 64.0inches.

    asked on May 15, 2019
  6. physics

    Two workhorses tow a barge along a straight canal. Each horse exerts a constant force of magnitude F, and the tow ropes make an angle θ with the direction of motion of the horses and the barge. (Figure 1) Each horse is traveling at a constant speed v. How

    asked on October 24, 2013
  7. physics

    a 3.5 kg block is accelerated from rest by a compressed spring of spring constant 640 N/m. The block leaves the spring at the springs relaxation length.The block then travels over a horizontal floor with coefficient of kinetic friction 0.25. The friction

    asked on November 23, 2010
  8. math

    There are 5 blue chips, 4 red chips and 3 yellow chips in a bag. One chip is drawn from the bag. That chip is placed back into the bag, and a second chip is drawn. What is the probability that the two selected chips are of different colors? Express your

    asked on November 17, 2019
  9. Maths

    Given that 3^9 + 3^12 + 3^15 + 3^n is a perfect cube number. Calculate the value of n.

    asked on November 12, 2016
  10. Math

    the 64 people who answered "yes" to a question, 6 were male. Of the 70 people that answered "no" to the question, 8 were male. If one person is selected at random from the group, what is the probability that the person answered "yes" or was male?

    asked on April 11, 2016
  11. Math

    Given the box plot, will the mean or the median provide a better description of the center? box plot with min at 6, Q1 at 7.5, median at 8, Q3 at 23, max at 32.5 The mean, because the data distribution is symmetrical The median, because the data

    asked on May 1, 2016
  12. math

    1,5,11,19 (a) calculate next two patterns (b) calculate the nth term of the pattern (c)which term of the pattern is equal to 2549. thanks a lot

    asked on June 3, 2015
  13. MATHS

    A boy spent 1/4 of his money on sweets and 3/8 on bus fares. What fraction of his money is left?

    asked on November 2, 2014
  14. Math

    An alloy is composed of nickel, zinc, and copper in a ratio of 3:4:13. How many kilograms of each metal are needed to make 4 kg of this alloy?

    asked on May 14, 2017
  15. calculus

    find the function that is finally graphed after the following transformations are applied to the graph of y=square root x in the order listed. a. reflected about the y-axis b. shift down 3 units c. shifht left 9 units please show work

    asked on December 13, 2012
  16. physics

    Cars A and B are racing each other along a straight path in following manner: Car A has head start and is a distance dA beyond starting line at t=0. The starting line is at x=o. Car A travels at constant speed vA. Car B starts at starting line but has

    asked on September 27, 2009
  17. World History

    How did the Industrial Revolution introduce justifications for imperialism? (Select all that apply.) Industrialized nations sought to bring technological knowledge to Africa and Asia. Industrialized nations sought colonies to deport people who would work

    asked on March 19, 2019
  18. Algebra

    find the measure of an angle whose supplement measures two times its measure

    asked on January 22, 2011
  19. Communication

    1.) Song Xue, a Chinese exchange student, tells his mother during a telephone conversation that he is enjoying his time in America but Americans are loud. What element of forming supportive messages has Song Xue forgotten? A.) ask questions B.) demonstrate

    asked on September 29, 2019
  20. Physics!!!

    A 24-V battery is connected in series with a resistor and an inductor, with R = 5.6 Ω and L = 2.0 H, respectively. (a) Find the energy stored in the inductor when the current reaches its maximum value. (b) Find the energy stored in the inductor one time

    asked on February 27, 2012
  21. Spanish

    PLEASE HELP ME! Will make as brainliest! Much appreciated. 1. A celebration in the countryside in which family and friends get together in Cuba is known as a _______. (1 point) Habana Vieja guateque campesino trovadores cocotaxi 2. La Habana Vieja's annual

    asked on September 19, 2018
  22. math

    Which point is located at (– 3 , – 2)?

    asked on October 19, 2017
  23. physics

    You are a member of an alpine rescue team and must get a box of supplies, with mass 3.00kg , up an incline of constant slope angle 30.0∘ so that it reaches a stranded skier who is a vertical distance 2.90m above the bottom of the incline. There is some

    asked on October 24, 2013
  24. history

    What role did nativism play in federal policy? A. Concern for immigrants' children led to increased public education funding. B. Concern about living conditions led to construction of public housing. C. Concern about conditions in factories led to more

    asked on February 13, 2018
  25. Social Studies

    1. What negative impact did gold and silver mining have in the west? I think it would be Ghost towns were left behind after the mines stopped producing. Is this right?

    asked on January 9, 2018
  26. Language Arts

    "Phoebe turned to me with a puzzled expression on her face. I think that she was surprised at what she said but I new exactly why she lied. It was easier sometimes. " Which type of conflict best characterizes the events in the passage? ^^ -character vs.

    asked on June 8, 2016
  27. probability

    13 people study French, 15 people study German and there are 21 people in total. What is probability to chose person who takes both of the languages?

    asked on May 16, 2020
  28. english

    13. Which of the following sentences contains a comma splice? A. Our friend, who travelled from Tennessee, was quite tired when he arrived. B. We need help with organization, structure, and spelling. **C. The pots clanged to the kitchen floor, the kitten

    asked on March 14, 2016
  29. Physics

    How fast (in rpm) must a centrifuge rotate if a particle 69-cm from the axis of rotation is to experience an acceleration of 200438 g's? (can you show me how you get the answer) be thorough

    asked on September 18, 2017
  30. chemistry

    A 32.2 g iron rod, initially at 22.3 C, is submerged into an unknown mass of water at 63.9 C, in an insulated container. The final temperature of the mixture upon reaching thermal equilibrium is 58.6 C. What is the mass of the water?

    asked on March 19, 2012
  31. physics

    state the surface powers required to produce the following lenses with +6.25D front curves. a. -0.50 DS 6. +0.50 DS c. +1.75 DS

    asked on October 23, 2012
  32. math

    Orlando has a bank statement balance of $414.25 and $5.90 service charge. His check register shows $374.16 and he has two outstanding checks of $26.54 and $21.78. What is his true balance?

    asked on January 25, 2012
  33. Math

    Roni wants to write an equation to represent a proportional relationship that has a constant of proportionality equal to StartFraction 7 over 25 EndFraction. She writes the equation y = x + StartFraction 7 over 25 EndFraction. What error is Roni making? A:

    asked on February 6, 2020
  34. Statistics

    Let X1,X2,…,Xn be i.i.d. random variables with mean μ and variance σ2 . Denote the sample mean by X¯¯¯¯n=∑ni=1Xin . Assume that n is large enough that the central limit theorem (clt) holds. Find a random variable Z with approximate distribution

    asked on May 25, 2020
  35. Math

    What is the equation of the line shown on the graph? A graph is shown in the xy-plane. The x-axis is labeled as Number of Target Hits and the y-axis is labeled as Number of Points Scored. The values on the x-axis range from 0 to 18 in increments of 2 and

    asked on September 25, 2019
  36. biology

    Which of the following can result from a DNA mutation? (Select all that apply.) The DNA base-pairing rules change. The genetic information is changed. The structure and function of the proteins coded by the DNA change. A different version of the DNA

    asked on April 18, 2019
  37. History

    How did the case of Gibbons v. Ogden have an economic impact on America in the 19th century? The Supreme Court's decision allowed state laws to override federal laws when they conflicted regarding economic matters. The Supreme Court's decision allowed

    asked on May 22, 2018
  38. Chemistry

    Knowing that delta Hvap for water is 40.7 kJ/mol, calculate Pvap of water at 46 C

    asked on January 23, 2012
  39. math

    Find the coordinates of the midpoint of the segment whose endpoints are H(5, 13) and K(7, 5).

    asked on May 9, 2020
  40. biology

    Identify which of the following statements about genes is true. (Select all that apply.) Genes are "read" by tRNA. Genes hold the instructions for traits. Genes are segments on the DNA strand. Genes hold the instructions for making proteins.

    asked on April 18, 2019
  41. English

    1. Choose the answer that best matches the word in italics. Use context clues to determine the meaning of the word, if necessary. The decorations were reminiscent of autumn leaves. (1 point) leftovers made reminders symbolic 2. Choose the answer that best

    asked on October 4, 2018
  42. Algebra 1

    The weight needed to balance a lever varies inversely with the distance from the fulcrum to the weight. A 120-lb weight is placed on a lever, 5 ft from the fulcrum. What amount of weight, in pounds, should be placed 8 ft from the fulcrum to balance the

    asked on May 2, 2018
  43. Statistics

    Let X denote an exponential random variable with unknown parameter λ>0 . Let Y=I(X>5) , the indicator that X is larger than 5 . Recall the definition of the indicator function here is I(X>5)={1ifX>50ifX≤5. We think of Y as a censored version of the

    asked on May 27, 2020
  44. World History

    Which Industrial Revolution inventor improved upon the Newcomen steam engine? James Watt Eli Whitney James Hargraves Elias Howe I think its James HArgraves

    asked on April 26, 2019
  45. math

    The stem-and-leaf plot shows the test scores of a science class. Use the plot to answer the question. many students scored 78? (1 point) 1 student 2 students 3 students 4 students

    asked on May 16, 2018
  46. math

    Fair Race Portfolio Template: Functions Instructions: Follow the instructions provided in the lesson. Use this template to record your work and answers. Please submit this template to the dropbox along with any other evidence you would like to provide for

    asked on February 17, 2017
  47. physics

    Three charges lie along the x-axis. At x = 2.0m, a charge of 15x10^-6 C is fixed. At the origin, a charge of 30x10^-6 is fixed (like in question #8). Where can a third charge be placed between them so it feels no net force?

    asked on May 6, 2013
  48. Physics

    A car can decelerate at -2.47-m/s2 without skidding when coming to rest on a level road. What would its deceleration (in m/s2) be if the road is inclined at 8.7o and the car moves uphill? (Assume the same static friction coefficient.

    asked on September 17, 2017

    A car has an initial speed of 25m/s and a constant deceleration of 3m/s^2. Determine thewvelocity of the car when t=4s. What is the displacement of the car during the 4-s time interval? How much time is needed to stop the car?

    asked on February 17, 2013
  50. physics

    A charge Q = -520 C experiences a downward force of 0.04 N. What is the electric field in N/C at the point where the charge is located? Take upward to be positive. I know that E=Kq/r^2 therefore E= (9.0*10^9Nm)(-520*10^-6c)/r^2 I'm not sure how to get the

    asked on January 23, 2011
  51. Math

    Use mathematical induction to prove that 5^(n) - 1 is divisible by four for all natural numbers n. Hint: if a number is divisible by 4, then it has a factor of 4. also, -1 = -5 +4 This is a take home test so I don't want the answer because I want to know

    asked on May 12, 2010
  52. social studies

    In Ancient Egypt, the pharaoh governed by relying on ____ . Just below the pharaoh were_____ , who helped the pharaoh govern Egypt. _____ kept records for Egypt's government.

    asked on August 13, 2019
  53. biology

    There is a 3:2 male-to-female ratio at the Science is Cool! lab company. Based on this ratio, which of the following could be the number of male employees and female employees at the company? 54 male employees and 36 female employees 24 male employees and

    asked on April 18, 2019
  54. physics

    What is the work done by a crane to lift a 500kg beam over a height of 50.0m? Assume the crane lifts the beam at a constant velocity.

    asked on October 30, 2018
  55. English

    Help me please Unit 1: Growing up TEST from actively Learn please help me out

    asked on September 24, 2018
  56. Social Studies

    What did Alexis de Tocqueville observe on his visit to the United States that reflected changes that were happening in the country during Jackson's administration? (1 point) a strict divide between rich and poor a growing spirit of democracy and equality

    asked on November 28, 2017
  57. Math!!

    1. Which two square roots are used to estimate square root 8? A. 2 and 3 B. 3 and 4 C. 4 and 9 D. 9 and 16 2. Which two square roots are used to estimate square root 42? A. 25 and 36 B. 36 and 49 C. 49 and 64 D. 25 and 64 My answers: 1. B 2. B. Am I right?

    asked on October 11, 2016
  58. physics

    consider the following: A point on the tip of a tuning fork vibrates in harmonic motion described by the equation d=10sin(ωt). 1. ω for a tuning fork that has a frequency of 535 vibrations per second. (I don't understand this question) 2. How many cycles

    asked on March 21, 2012
  59. chemistry

    2. A 350 mL buffer solution containing 0.15 M HF and 0.150 M NaF is reacted with sodium hydroxide. What mass of NaOH can this buffer neutralize before the pH rises above 4.0? If the same volume of buffer was 0.35 M in HF and 0.35 M in NaF then what mass of

    asked on December 1, 2010
  60. mathematics

    A semicircular garden bed at the botanical gardens needs to be fenced off while the seedlings are established. If the straight edge of the bed is 20.5m in length, calculate the total length of fencing needed to surround the garden bed.

    asked on June 3, 2020
  61. Science

    A student tried to solve the following problem by selecting the conversion below. What, if anything, did the student do wrong? How many moles of AgNO3 are needed to produce 6.75 moles of copper (II) nitrate Cu(NO3)2 upon reacting with excess copper (Cu)?

    asked on February 26, 2020
  62. math

    The planning committee at school has 11 members. Exactly five of these members are teachers. A four-person subcommittee with at least one member who is not a teacher must be formed from the members of the planning committee. How many distinct subcommittees

    asked on October 29, 2019
  63. English

    “Beauty is truth, truth beauty...” This phrase from John Keats’s “ode on a Grecian urn” is an example of a(n) Metaphor Simile Stanza Apostrophe** Is my answer right?

    asked on May 20, 2019
  64. Math

    Use the formula v=lwh to find the volume of a rectangular prism with following dimensions length=7 in. width=4 in. height =3 in.

    asked on March 18, 2019
  65. Math

    Which situation can be represented by the expression x plus negative 3? Choose all that apply. A.An elevator went down 3 floors. B.A person spent $3. C.A person added 3 books to the shelf. D.The temperature dropped 3 degrees. My Answers are B and C

    asked on February 13, 2018
  66. MATH

    choose the appropriate metric unit for the mass of concrete in a section of sidewalk? a:kilogram b:milligram c:gram d:meter

    asked on April 3, 2017
  67. Heath

    1. Which digestive organ is the last organ food passes through before reaching your stomach? (1 point) pharynx epiglottis esophagus mouth 2. Starches and sugars belong to which class of nutrients? (1 point) carbohydrates fats proteins enzymes 3. A method

    asked on November 11, 2016
  68. CALC

    Find center of mass of the lamina that occupies the region D and has the given density function ρ. D is the triangular region with vertices (0, 0), (2, 1), (0, 3); ρ(x, y) = 5(x + y) mass=30 Find center of mass

    asked on October 20, 2016
  69. math please help

    This part I have: 1)Derive an equation for the bending deflection δ of the bat at B, where the ball hits the bat, in terms of the applied load, P, the span, lAB, the Young's modulus of ash, E and the moment of inertia of the cross section, I. Answer:

    asked on November 8, 2015
  70. Mechanical behavior

    An atomic force microscope cantilever, of rectangular cross section, has a length, l, of 200μm, a width, b, of 20μm and a depth, h, of 1μm. It is made of silicon nitride, which has a Young's modulus, E, of 300GPa. What is the maximum force that can be

    asked on November 8, 2015
  71. Algebra II

    If an object is propelled upward from a height of 16 ft at an initial velocity of 80 feet per sec, the its height after t seconds is given by the equation h=-16t²+80t+16, where h is in feet. after how many seconds will the object reach a height of 116 ft?

    asked on July 3, 2011
  72. SS

    The united states is the largest exporter of wheat Canada is the second largest .Today there are fewer Canadian farms. How is it possible that the number of farms has decreased but the praie provinces continue produce most of canads wheat

    asked on March 8, 2019
  73. math

    How many solutions does the system of equations have? 4x = -12y + 16 and x + 3y = 4

    asked on January 23, 2019
  74. SS

    Which of the following statements best describes the spread of Islam during the Arab conquests? A. Islam spread only within the lands conquered by Arabs. B. Everyone in conquered lands was forced to convert to Islam. === C. Few non-Arabs ever converted to

    asked on October 2, 2018
  75. math algerbra

    1. Which exponent makes the statement true? Start Fraction 1 over 5 superscript 9 baseline End Fraction equals 5 superscript question-mark baseline (1 point) 9 –9 one-ninth –one-ninth 2. y5 • y14 = (1 point) 2y19 y60 y19 2y60 3. Start Fraction w

    asked on October 9, 2017
  76. World history

    9. What evidence best supports the influence of the Moche culture on the Inca empire? A. the creation of the geoglyphs B. the existence of the road networks C. the extensive nature of Incan trade D. the worship of a sun god

    asked on February 9, 2017
  77. Algebra

    Please check all of my answers and tell me if they are right. 1. What is the simplified form of the following expression? 7m^2 + 6.5n – 4n + 2.5m^2 – n (1 point) A. 9.5m^2 + 1.5n*** B. 4.5m^2 + 1.5n C. 1.5m^2 – 4.2n D. 9.5m^2 – 1.5n 2. Simplify the

    asked on October 9, 2016
  78. Ashley

    An athlete performing a long jump leaves the ground at a 27.1 ∘ angle and lands 7.73 m away. 1). What was the takeoff speed? Express your answer using three significant figures and include the appropriate units. 2).If this speed were increased by just

    asked on September 16, 2016
  79. Language arts

    The diary of Anne frank act l and act ll Can someone please explain on bow Anne's character is developed through dialogue and stage directions?

    asked on May 13, 2015
  80. math

    the yearbook club is having a bake sale to raise money for the senior class. LArge cupcakes are sold for 1.25 and small cupcakes are .75. If 105 cupcakes were sold for a total amount of 109.75, how many large cupcakes did the yearbook club sell?

    asked on November 26, 2014
  81. physics

    A pump lifts 200kg of water per hour a height of 6.0m . Part A What is the minimum necessary power output rating of the water pump in watts? Part B What is the minimum necessary power output rating of the water pump in horsepower?

    asked on October 24, 2013
  82. physics

    What are the first, second, and third frequencies audible from a 20 cm long organ pipe when (A) only one end is open and when (B) both ends are open. The speed of sound through the air inside the organ pipe is 343m/s. (Hint: if a harmonic does not exist,

    asked on March 28, 2013
  83. Trig

    Use the half-angle formulas to come up with an exact expression for each function value below. You do not have to simplify your answers. cos(pi/16)

    asked on April 1, 2012
  84. math

    Let C = 2.32 N + 34180 represent the cost (C) of raising a child to 18 years of age, on an income (N). If the cost is $120,000, what is the income?(

    asked on January 23, 2012
  85. Algebra II

    A projectile is thrown upward so that its distance above the ground after t sec is given by h(t)=-11t²+264t. After how many seconds does it reach its maximum height?

    asked on July 3, 2011
  86. science

    which two gases have been added to Earth's atmosphere in large amounts and are believed to have increased global warming by absorbing infrared radiation? 1. neon and argon 2. chlorine and nitrogen 3. hydrogen and helium 4. methane and carbon dioxide

    asked on May 28, 2011
  87. maths

    height=6 feet length=5 feet breadth=4 feet what is the volume of the container in liters?

    asked on March 23, 2011
  88. chemistry

    The total pressure in a 11.3 L automobile tire is 44 psi at 11°C. By how much does the pressure in the tire rise if it warms to a temperature of 29°C and the volume remains at 11.3 L?

    asked on February 10, 2011
  89. physics

    The position of a particle moving along an x axis is given by x = 15t2 - 2.0t3, where x is in meters and t is in seconds. (a) Determine the position, velocity, and acceleration of the particle at t = 3.0 s. x = m v = m/s a = m/s2 (b) What is the maximum

    asked on December 14, 2008
  90. Math

    Tara has 4 and 4 over 5 feet of rope. Part A: How many 2 over 5 foot pieces can Tara cut from the 4 and 4 over 5 feet of rope? Show your work. (5 points) Part B: Using the information in Part A, interpret the meaning of the quotient in terms of the two

    asked on April 20, 2020
  91. math

    Find the length of the segment ¯¯¯¯¯¯¯¯ M N with endpoint M at ( 2 , − 3 ) and endpoint N at (8, 5). Round your answer to the nearest tenth, if necessary.

    asked on February 17, 2020
  92. english

    Which passages from Chapters 1–3 of Don Quixote most clearly reflect parodies of chivalric stories? Select all that apply. Don Quixote, Chapters 1–3 He persuaded a good, honest country labourer, Sancho Panza by name, to enter his service as squire,

    asked on September 12, 2019
  93. biology

    Determine if the following statement is true or false. If true, choose TRUE. If false, choose the rewording that is true. According to the law of independent assortment, alleles for each gene are inherited together so that they always stay together.

    asked on April 18, 2019
  94. biology

    The following genotypes were produced in a cross. TT and Tt Identify the parent genotypes for these offspring. tt and tt TT and tt TT and Tt TT and TT

    asked on April 18, 2019
  95. Social studies

    1. What helped spread nationalistic feelings throughout Europe in the early 1800s? A. the conquests of Napoleon Bonaparte B. the social welfare programs of Otto von Bismarck C. the influence of the pope D. the unification of the German Confederation 2.What

    asked on October 23, 2018
  96. chemistry

    A calorimeter contained 75g of water at 16.95 degree Celsius. A 93.3g Iron at 65.58 degrees celsius was placed in it, giving a final temperature of 19.68 degrees Celsius for the system. Calculate the heat capacity of the calorimeter. specific heats are

    asked on September 15, 2018
  97. English 10 ASAP

    Determining the author's purpose in a text relies on (10 points) biographical information research the author used evidence in the text

    asked on June 28, 2018
  98. History

    How might Athenian democracy be considered the root of modern democratic governments?

    asked on October 16, 2017
  99. MATH

    The perimeter of the base of the regular quadrilateral pyramid is P = 30 cm. Find the sum of all edges of this pyramid, if the perimeter of a lateral face is 27.5 cm

    asked on April 25, 2017
  100. MATH

    I NEED HELP -5g - 6 for g= -2 4 16 10 -13 write an algebraic expression for the sum of 3 coins and c coins c+3 c/3 3c c-3 what value of x is a solution to the equation x-2=16 14 18 21 12 z/-12=-5 7 -60 -17 60 estimate the solition of the equation x-8.1=5.3

    asked on October 20, 2015


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