Popular questions and responses by kayla
  1. Statistics

    If the probability of a newborn child being female is 0.5, find the probability that in 100 births, 55 or more will be female. Use the normal distribution to approximate the binomial distribution.

    asked on February 10, 2013
  2. history

    Which option accurately describes the impact of Confucianism on Asian cultures? Qin Shi Huang declared Confucianism as the Chinese Empire’s official religion, resulting in a civil war. Confucianism established a governmental model, defined leadership

    asked on January 25, 2018
  3. English

    Why does Douglass state that “education and slavery were incompatible with each other”? There wasn’t time for slaves to go to school; they had too much work to do Being educated meant that slaves might question their existence and try to escape

    asked on December 10, 2015
  4. Physics 11

    A 62kg cyclist changes the speed of a 12kg bicycle from 8.2m/s to 12.7m/s. Determine the work done. I've already answered & gotten this question correct, however it made me confused about the concept. I found Ek. & Ek to find change in Ek which was

    asked on May 30, 2017
  5. Algebra

    Write an equation that expresses the following relationship. U varies directly with the cube of P and inversely with D. In your equation,use K as the constant of proportionality.

    asked on February 7, 2016
  6. Precalculus

    Hello, An Aircraft carrier can travel 450km in the same time a container ship travels 300km. If the aircraft carrier was traveling 5km/h faster what was the speed of the container ship? I don't need help answering the actual question, I have a pretty

    asked on January 4, 2019
  7. Physics 11

    Waves travelling along a string have a wavelength of 2.4m. When the waves reach the fixed end of the string, they are reflected to produce a standing wave pattern. How far from the end are the first 2 antinodes? I know that each wavelength has 2 antinodes

    asked on June 9, 2017
  8. Physics 11

    In the absence of air resistance, a ball of mass m is tossed upward to reach a height of 20m. Given that Fg=mg, what is the net force on the ball at the 10m position (half way up)? a)2mg b)mg c)mg/4 d)mg/2 I already got this wrong bc I had no idea how to

    asked on May 30, 2017
  9. science

    The pilot of an airplane traveling 180km/h wants to drop supplies to flood victims isolated on a patch of land 160m below. The supplies should be dropped how many seconds before the plane is directly overhead?

    asked on August 22, 2013
  10. history

    Which most accurately describes events in the life of explorer Sir Walter Raleigh? Raleigh led major expeditions to America, including the ill-fated Roanoke Colony. Raleigh is best known for establishing the colony of New Mexico for Spain. Raleigh was the

    asked on January 24, 2018
  11. Physics 11

    An FM radio station transmits radio signals that have a wavelength of 3.2m. Where would you have to adjust your tuner in order to pick up its music? Note: FM waves are measured in MHZ I have no idea where to go with this... Thank you :)

    asked on June 6, 2017
  12. american History

    How did trade with Asia impact Italy? Italians sought new reasons to extend the Crusades as they fulfilled their need for Asian goods. The Byzantine Empire secured its position by becoming a conduit of trade between Italy and the Middle East. The increased

    asked on July 5, 2018
  13. world history

    Which accurately describes Portugal’s motivation for funding explorations along the coast of Africa? to navigate around Africa to Asia and find the kingdom of Prester John to navigate around Africa and find the kingdom of Japan to navigate around Africa

    asked on January 24, 2018
  14. Physics

    The speed of sound in a classroom is 343m/s. A) A tuning fork of frequency 512Hz is struck. What length of open air tube is required to create a resonant sound at the 1st harmonic? wavelength=v/f=343/512=0.67m L=.5wavelength=.5(.67)= 0.335m B) Fore the

    asked on June 11, 2017
  15. Physics 11

    2 men are fishing from small boats located 36m apart. Waves pass through the water, & each man's boat bobs up & down 15 times in 75s. At a time when 1 boat is on a crest, the other 1 is in a trough, & there is 1 crest between the 2 boats. f=15/75=.2Hz

    asked on June 7, 2017
  16. chemistry

    A 0.500M solution of a weak acid, HX, is only partially ionized. The [H+] was found to be 4.02 x 10^-3 M. Find the dissociation constant for this acid.

    asked on August 5, 2008
  17. math

    the population of a southern city follows the exponential law. If the population doubled in size over an 18 month period and the current population in 10000, what will be the population 2 years from now? the equation for the exponential equation is: A=ao e

    asked on November 21, 2008
  18. Physics 11

    A single wave pulse is sent along a thick rope that's tied to a thin rope, which in turn is attached to a wall. Reflection of the wave will occur at both points A (where the thick rope is attached to the thin rope) & point B (where the thin rope is

    asked on June 7, 2017
  19. Physics

    A 15kg box is given an initial push so that it slides across the floor & comes to a stop. I the coefficient of friction is .30, a) find Ffr- Fg=mg - Fg=15kg(9.8N/kg)=147N Ffr=mu(Fn) - Ffr=.30(147N)=44.1 b) Find the acceleration of the box. Hint: what is

    asked on May 1, 2017
  20. URGENT! Due soon and I used 8 of 10 attempts

    Archaeologists can determine the age of artifacts made of wood or bone by measuring the amount of the radioactive isotope 14C present in the object. The amount of isotope decreases in a first-order process. If 14.5% of the original amount of 14C is present

    asked on February 14, 2016
  21. Physics 203 ( College)

    Four particles, one at each of the four corners of a square with 2.5-m-long edges, are connected by mass less rods. The masses of the particles are m1 = m3 = 2.0 kg and m2 = m4 = 7.0 kg. Find the moment of inertia of the system about the z axis.

    asked on April 4, 2011
  22. Algebra

    Write an equation that expresses the following relationship. P varies directly with the square of D. In your equation, use K as the constant of proportionality.

    asked on February 8, 2016
  23. Physics

    If a 65 kg sprinter can accelerate from a standing start to a speed of 12 m/s in 3 s, what average power is generated?

    asked on February 5, 2015
  24. Social studies

    Which of the following did Ralph Waldo Emerson stress the importance of in his writings? The individual •• The family Agriculture Industry

    asked on November 28, 2016
  25. Trigonometry

    Angle x is a third quadrant angle such that cos x = -(2/3). What is the exact value of cos (x/2) ? Solve in simplest radical form.

    asked on March 5, 2020
  26. Physics

    A car is traveling at 7.0 m/s when the driver applies the brakes. The car moves 1.5 m before it comes to a complete stop. If the car had been moving at 14 m/s, how far would it have continued to move after the brakes were applied? Assume the braking force

    asked on November 12, 2016
  27. math

    Claudia wants to test if the binomial 3x−6 is a factor of P(x)=3x^3−9x^2+9x−6. First, she evaluates P(_[blank 1]_). After simplifying correctly, she is left with a remainder of _[blank 2]_. Based on the remainder, she correctly concludes that 3x−6

    asked on January 26, 2018
  28. English

    Why does Douglass state that “education and slavery were incompatible with each other”? There wasn’t time for slaves to go to school; they had too much work to do Being educated meant that slaves might question their existence and try to escape

    asked on December 10, 2015
  29. english

    can someone help me with this question?At several points in Sherman Alexie's "Indian Education" essay, Alexie uses comparison and contrast. Locate at least two examples and explain what each contributes to the essay? I just don't see a point of comparison

    asked on February 7, 2009
  30. Math

    If a fruit bowl three apples two bananas and five pears what is the ratio of the pears to Apples

    asked on August 4, 2016
  31. Physics 203

    A 4 kg block resting on a frictionless horizontal ledge is attached to a string that passes over a pulley and is attached to a hanging 2 kg block. The pulley is a uniform disk of radius 13.0 cm and mass 0.50 kg. (a) Find the speed of the 2 kg block after

    asked on April 6, 2011
  32. American History

    What disadvantages did Native Americans experience in their trading with Europeans? Native Americans became reliant on European technology. Native Americans could not trade effectively because they lacked economic leaders. Native Americans traded for items

    asked on July 3, 2018
  33. Math

    Write a polynomial of the lowest degree with real coefficients and with zeros 6-3i (multiplicity 1) and 0 ( multiplicity 5)

    asked on November 9, 2016
  34. World history

    How did the Crusades affect Jewish societies? (Select all that apply) A.) crusaders massacre Jews in France when Pope Eugenius III called for the second Crusade, led by French and German Kings. B.) jsu aligned with the Byzantine empire and helped Eastern

    asked on January 23, 2018
  35. physics

    Good chocolate is designed to melt at 34°C. A chocolate bar, originally frozen to a temp of -115°C, has its thermal energy doubled. Will it melt? It's not like temperature, so if thermal energy is doubled that means heat is being added & therefore likely

    asked on June 18, 2017
  36. Physics 11

    As water waves from the ocean approach a shallow beach, their wavelengths become shorter. Explain why. v=fwavelength, frequency remains constant & velocity & wavelength decrease or increase w/ water depth. Is that a reasonable answer or are they looking

    asked on June 11, 2017
  37. physics

    a block slides along a path that is without friction until the block reaches the section of length L = 0.75 m, which begins at height h = 2.0 m on a ramp of angle θ = 30°. In that section, the coefficient of kinetic friction is 0.40. The block passes

    asked on March 30, 2016
  38. Math

    There are 4 jacks in a standard deck of 52 playing cards. If Patricia selects a card at random, what is the probability that it will be a jack?

    asked on January 14, 2019
  39. math

    At the beginning of the week, a particular stock sold for 29 3/8 per share. At the end of the same week it sold for 31 2/8. What was the amount of increase per share? A. 2 3/8 B. 2 1/8 C. 1 7/8 D. 2 5/8 can someone please help me i'm not good at fractions

    asked on May 16, 2011
  40. Math and are my answers correct

    1.Male and female high school students reported how many hours they worked each week in summer jobs. The data is represented in the following box plots: two box plots shown. The top one is labeled Males. Minimum at 1, Q1 at 3, median at 10.5, Q3 at 14,

    asked on February 15, 2016
  41. math

    If you borrow $1,700 at 7% simple interest, how much interest will you pay? A. $1819 B. $119 C. $7.00 D. $120 I got b but im not sure

    asked on May 16, 2011
  42. Math

    if I have sin(6x)+cos(6x)how would I write it in terms of sin only?

    asked on March 22, 2011
  43. Physics 11

    The speed of water waves is 30cm/s in deep water & 15cm/s in shallow water. If the wavelength in deep water is 1.0cm, what is the wavelength in shallow water? (v2/v1)=(wavelength2/wavelength1) Therefore (15/30)=(wavelength2/1) - 15=30wavlength2

    asked on June 11, 2017
  44. Physics 11

    A 62kg cyclist changes the speed of a 12kg bicycle from 8.2m/s to 12.7m/s. Determine the work done. I used change in energy = work to find work against inertia which was 3479.85 Then I used V^2=V.^2 + 2ad to get ad=47.025 I then used W=mad to get work

    asked on May 23, 2017
  45. Physics

    What is the Earth's gravitational force on you when you are standing on the Earth and when you are riding in the Space Shuttle 380 km above the Earth's surface? Answer as a fraction of the surface gravity of Earth. (The Earth's radius is 6400 km.)

    asked on January 27, 2015
  46. Chemistry

    The chemical reaction for the generation of gas in an automobile safety air bag is 2NaN3(s)→ 2Na(s)+3N2(g) What volume of gas is produced if there are 130.0 grams of NaN3 used in the reaction? (The density of nitrogen gas is 0.916 g/L.) Please show your

    asked on March 31, 2014
  47. Calculus

    A box is constructed out of two different types of metal. The metal for the top and bottom, which are both square, costs $2 per square foot and the metal for the sides costs $7 per square foot. Find the dimensions that minimize cost if the box has a volume

    asked on November 13, 2011
  48. Science

    What is one reason why the classification of protists and one kingdom is difficult?

    asked on March 7, 2019
  49. Physics 11

    Waves traveling along a string have a wavelength of 2.4m. When the waves reach the fixed end of the string, they are reflected to produce a standing wave pattern. How far from the end are the first 2 antinodes? I feel like I don't have enough info here...

    asked on June 8, 2017
  50. Chemistry

    H2 and F2 react according to the following equation, forming HF. H2(g) + F2(g)  2HF(g); H° = –271 kJ If H2(g) and F2(g) were mixed in a thermally insulated vessel, the reaction that occurred would be a. endothermic, and the temperature of the

    asked on July 2, 2013
  51. chemistry

    When 16.3 g of magnesiumm reacts with 4.52 g of oxygen, how many grams of magnesium oxide will be performed? Identify the limiting and excess reactants.

    asked on February 15, 2012
  52. Anatomy

    The tricuspid valve is closed: A. during the rapid filling of the ventricles B. when the mitral valve is closed C. while the atria are contracting D. during the ejection of blood from the ventricles I think the answer is A but not completely sure.

    asked on July 28, 2011
  53. math

    Given a polynomial equation p(x)=0, which expressions could be a pair of irrational roots of the equation? please help I don't know how to solve this

    asked on January 25, 2018
  54. math PLZ HELP

    Which expression represents 12 times the number n? a: n+12 b: 12n c: n-12 d:n/12

    asked on June 12, 2017
  55. ALGEBRA 1

    You practice playing your guitar every day. You spend 15 minutes practicing chords and the rest of the time practicing a new song. So the total number of minutes y you practice for the week is given by y=7(15+x), where x is the number of minutes you spend

    asked on October 7, 2013
  56. Physics

    A stationary 3.0-m board of mass 6.0 kg is hinged at one end. A force is applied vertically at the other end, and the board makes a 30° angle with the horizontal. A 40-kg block rests on the board 80 cm from the hinge as shown in the figure below. a) Find

    asked on April 28, 2011
  57. math

    the minute hand of a clock is 6 inches long. how far does the tip of the minute hand move in 15 minutes?

    asked on December 8, 2008
  58. Economics

    Why do people routinely stuff themselves at all-you-can-eat buffets? Explain in terms of both utility and demand theories. At any level, the marginal cost of take another bite at an all-you-can-eat place is zero. In terms of utility, a person should

    asked on February 4, 2007
  59. chemistry

    What is the difference between dipole-dipole interactions and dipole-induced dipole interactions? 1.) dipole-dipole interactions involve two non polar molecules. Dipole induced dipole interactions involve one polar molecule with a permanent dipole and one

    asked on February 8, 2018
  60. geometry

    Name the property of equality or congruence that justifies going from the first statement to the second statement. StartFraction x Over 2 EndFraction equals 3x2=3 x equals 6x=6 symmetric property of congruencesymmetric property of congruence distributive

    asked on November 2, 2017
  61. Physics 11

    You are creating waves in a rope by shaking your hand back & forth. W/out changing the distance your hand moves, you begin to shake it faster & faster. What happens to each of the following aspects of the wave? Amplitude remains the same as the distance

    asked on June 6, 2017
  62. history

    Which statement best describes the provisions of the Missouri Compromise? a) It maintained the balance of free and slave states. b) It enacted a stricter fugitive law. c) It outlawed slavery in the District of Columbia. d) It prohibited slavery in the

    asked on May 26, 2016
  63. Chemistry

    A sample of gas occupies 24.5 L at a pressure of 1.57 atm; what is the pressure if the volume is increased to 48.3 L?

    asked on January 9, 2013
  64. geometry

    Find the area of square QRST with the following vertices Q(-2, 3), R(1, 0), S(4, 3) and T(1, 6).

    asked on January 4, 2012
  65. Physics

    The heating element of a simple heater consists of a 2.2m--long, 0.70mm--diameter nichrome wire. When plugged into a 120 V outlet, the heater draws 7.5 A of current when hot. I found that the wire's resistance when it was hot was 16 ohms. Now using this

    asked on October 21, 2011
  66. English

    What type of fallacy is "Never loan a tool to a friend. I did once and never got it back."

    asked on September 30, 2010
  67. english- write a teacher

    can you please give me an example here in the essay of a transitional word- i don't think i am understanding it really... author: Brent Staples my first victim was a woman-white, well dressed, probably in her early twenties. I came upon her late one

    asked on September 10, 2008
  68. Math

    Devon wanted to know if x−3 is a factor of f(x)=x^3+x^2−10x+8. She applied the Factor Theorem and concluded that x−3 is not a factor of f(x), as shown in the following work. f(−3)=(−3)^3+(−3)^2−10(−3)+8=20 f(−3)=20, so the remainder is

    asked on March 13, 2020
  69. Precalculus 11

    Determine if the given value is a solution for each quadratic. Answer yes or no. 2x^2-3x(root 2)+2=0 I know the answer is yes but I don't know how to get to that answer. Thanks a ton! :) Kayla

    asked on November 29, 2017
  70. english 2

    Can someone please please help me!!!! 1.Read the following sentences from "Lifeguard Rules!" “That’s it, Ira and Michael,” Francesca had said. "You guys don’t get a third warning. Go spend fifteen minutes out of the water. I’ll inform you when

    asked on September 26, 2017
  71. Emergent computer tech

    1. Text that is located between and appears in the browser’s ______________. answer: Tab title 2. There are _______ levels of headings in HTML. answer 6 3. If the tags are around a word, then it will be ________. answer Emphasized 4. A link’s

    asked on August 28, 2017
  72. Chemistry

    Which atom has a change in oxidation number of –3 in the following redox reaction? K2Cr2O7 + H2O + S - - > KOH + Cr2O3 + SO2 K Cr*** O S

    asked on May 20, 2016
  73. physics

    Boxes A and B are connected to each end of a light vertical rope. A constant upward force F = 80.0 N is applied to box A. Starting from rest, box B descends 12.0 m in 4.00 s. The tension in the rope connecting the two boxes is 36.0 N. What are the masses

    asked on March 1, 2016
  74. English

    Conductors” on the railroad were People who drove the trains People who guided escaped slaves to free northern states People who provided transportation to slaves in free states < or B. Lincoln's short speech begins with the words "Four score and seven

    asked on December 10, 2015
  75. history

    Which answer offers the best explanation for why Tecumseh fought alongside the British in the War of 1812? Tecumseh was well paid by British generals. Tecumseh wanted to preserve trade with Britain. Tecumseh considered the United States to be an enemy.

    asked on December 8, 2015
  76. algebra

    The scientific notation 3.14 x 10 -3 has what value

    asked on July 2, 2014
  77. math

    A) which is the better value a 12 ounce jar of honey for $2.25 or an 18 ounce jar of honey for $3.24? B) the supermarket displays the unit price for the 12 ounce jar in terms of cost per ounce, but displays the unit price for the 18 ounce jar in terms of

    asked on May 11, 2014
  78. health

    1.D 2.A 3.D 4.B 5.C 6.C 7.B 8.A 9.D 10.D 11.B 12.A 1. Joey lifts a heavy backpack off the ground.as he lifts the backpack,he keeps his legs straight and uses his biceps and back muscles to lift.in your analysis of joeys's form,you conclude he needs to use

    asked on March 16, 2014
  79. Chemistry

    In a reaction between pure acetic acid and sodium bicarbonate, 14.7 grams of sodium bicarbonate was added to 21.0 mL of acetic acid. Which reactant is the limiting reactant in this reaction? Name of limiting reactant (acetic acid or sodium bicarbonate):

    asked on September 13, 2013
  80. Physics

    During 200 meter and 400 meter races, runners must stay in lanes as they go around a curved part of the track. If runners in two different lanes have exactly the same speed, will they also have exactly the same centripetal acceleration as they go around a

    asked on January 21, 2013
  81. physics

    How long will it take an echo to return across a canyon that is 61.0 m from one side to the other if the temperature is 25 C?

    asked on July 12, 2011
  82. Physics 203

    A 1.3-kg 10-cm-diameter solid sphere is rotating about its diameter at 77 rev/min. (a) What is its kinetic energy? (b) If an additional 5.0 mJ of energy are supplied to the rotational energy, what is the new angular speed of the ball? rev/min

    asked on April 6, 2011
  83. physics

    The picture shows a uniform ramp between two buildings that allows for motion between the buildings due to strong winds. At its left end it is hinged to the building wall , at its right end it has a roller that can roll along the building wall. There is no

    asked on February 7, 2011
  84. GPA

    I'm a junior in high school. I have a horrible 1.2 GPA at the moment. Is it even possible to raise my GPA to at least a 2.8 by the end of my senior year. (Its the beginning of my junior year right now.)

    asked on September 16, 2010
  85. chemistry

    Now "react" methane (CH4) with oxygen (O2) to produce carbon dioxide (CO2) and water (H2O). Start with one molecule of methane and one molecule of oxygen. Continue reacting molecules of CH4 and O2 until all the reactant atoms have been used to form

    asked on August 1, 2008
  86. chemistry

    36 colored paper clips (12 each of 3 different colors) 1.Each paper clip represents a single atom. Designate a different color of paper clip to represent atoms of oxygen (O), hydrogen (H), and carbon (C). Makes two molecules each of hydrogen (H2) and

    asked on August 1, 2008
  87. chem

    if the length of Mg is 2.7 cm and the mass per meter of Mg is .981 how do i find the mass of the Mg?

    asked on May 28, 2008
  88. government

    "The united states in congress assembled shall never engage in war...nor coin money,nor regulate the value thereof, nor [spend] the sums and expenses necessary for the defense and welfare of the united states...nor borrow money on the credit of the united

    asked on May 15, 2008
  89. Math

    Why is it important to consider multiplicity when determining the roots of a polynomial equation?

    asked on March 13, 2020
  90. algebra 2

    What is the number of distinct possible rational roots of p(x)=2x2+7x+6? I need help on how to solve this

    asked on January 25, 2018
  91. Chemistry

    The adult blue whale has a lung capacity of 5.0 x 10^3L. Calculate the mass of air (assume an average molar mass of 28.98g/mol) contained in an adult blue whales lungs at 0.0 Celsius and 1.00atm, assuming the air behaves ideally. I have the answer but

    asked on January 18, 2018
  92. English

    3. How does Malik relate with his mother in “The Next Adventure”? How do their interactions change over the course of the story? Use specific details and evidence from the text to support your response. Your response should be at least two complete

    asked on October 26, 2017
  93. Physics 11

    A girl pushes her little brother on his sled w/ a force of 35N for 840s. How much work does she do if the force of friction I'd 27N? I subtracted the force of friction from the applied force to get my net force of 8N but I don't know where to go from

    asked on May 23, 2017
  94. Physics 11

    A 90kg basketball player carries about 720J of kinetic energy when running down the court. If the coefficient of kinetic friction between good runners & the floor is .600, how far does the player skid when trying to stop? Hint: what work was done by

    asked on May 23, 2017
  95. Social studies

    1. Which of these people is part of the labor force a.an eighth grader with a paper route b. a retired sales person c. a full time college student d.an auto mechanic•• 2. Which is the best example of frictional unemployment? A plumbers contract with an

    asked on May 10, 2017
  96. Chemistry

    You are given Ka of carbonic acid is 4.3 x10^-7. This means that Carbonic acid is a good hydrogen-ion acceptor*** good hydrogen-ion donor poor hydrogen-ion acceptor poor hydrogen-ion donor

    asked on June 2, 2016
  97. math

    Marco is studying a type of mold that grows at a fast rate. He created the function f(x) = 345(1.30)^x to model the number of mold spores per week. What does the 1.30 represent? How many mold spores are there after 4 weeks? Round your answer to the nearest

    asked on November 13, 2015
  98. social stuides

    The leaders of the Virginia Company recruited more settlers and reorganized the colony. They allowed the new settlers to own land. Those settlers began to grow tobacco, a crop they learned about from the Indians. By 1612, Virginians were shipping tobacco

    asked on September 29, 2015
  99. Geometry

    a tire leaves a track in fresh snow. The area of the track is 250 square feet. how many turns does the tire make?

    asked on March 19, 2015
  100. Help math

    a ribbon measuring (v+4) feet in length was cut into two pieces in the ratio 3:7. What was the length of the longer piece? answer

    asked on December 4, 2014


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