Most popular questions and responses by hanna
  1. 7th grade

    how do you know when something has energy?

    asked on April 15, 2009
  2. Math

    What is the answer to page 31 of pre-algebra with pizzazz (what do hair dressers do?) ?

    asked on September 14, 2014

    A Lights-A-Lot quality inspector examines a sample of 25 strings of lights and finds that 6 are defective. a. What is the experimental probability that a string of lights is defective? b. What is the best prediction of the number of defective strings of

    asked on February 18, 2016
  4. History

    Which identifies Japan’s movement from a feudal society to an industrialized nation? Class warfare that was established by disgruntled Japanese peasants led to the need for political reform and the end of feudalism. The spread of Christianity throughout

    asked on December 23, 2018
  5. Statistics

    I really need help with this problem. I am not sure what the question is asking and how to approach it! Thanks in advance! Its known that 2/3 of humans have a dominant right foot or eye. Is there also a right-sided dominance in kissing behaviour? In a

    asked on March 31, 2009
  6. Geometry

    To the nearest degree, what angle does a hill with a grade of 11% make with a horizontal line?

    asked on February 27, 2012
  7. Lanuage. Please Help !!!

    1.)what is the prepositional phrase in this sentence? Late last night their was aloud knock at the door a.)Late last night b.)there was c.)a loud knock d.)at the door 2.) what is the participle phrase in this sentence? Living in New York, he went to many

    asked on May 7, 2015
  8. Science

    I need to make an acrostic poem for science. My teacher said that each letter needs to start a sentence about plant life. The word is photosynthesis. I need some ideas by the 13th of June. I already have p-h-o-t of photosynthesis. Pls help me!

    asked on June 10, 2011
  9. Chemistry/Redox Reactions

    An electrochemical cell consists of a nickel metal electrode immersed in a solution with [Ni2+] = 1.0 M separated by a porous disk from an aluminium metal electrode immersed in a solution with [Al3+] = 1.0 M. Sodium hydroxide is added to the aluminium

    asked on August 18, 2008
  10. Physics

    Billy stands on a hill without slipping. In which direction is the force of friction acting?

    asked on March 10, 2015
  11. chemistry

    A given sample of a xenon fluoride compound contains molecules of the type XeFn where n is some whole number. Given that 9.03 × 1020 molecules of XeFn weighs 0.368 g, determine the value for n in the formula.

    asked on October 1, 2014
  12. chemistry

    A sample of sodium reacts completely with 0.568 of chlorine, forming 936 of sodium chloride. What mass of sodium reacted?

    asked on September 24, 2012
  13. Quick math help

    a set of data points has a correlation r= -0.86 your friend claims that because the correlation is close to -1 it is reasonable to use the line of best fit to make predictions is your friend correct explain your reasoning. I say she isn't correct because

    asked on September 27, 2015
  14. Chemistry

    A gas can holds 1.5 of gasoline, what is this quantity in cubic centimeters? answer using two significant figures,

    asked on September 24, 2012
  15. Math

    Bill and Joe leave their house at the same time heading in opposite directions. If Bill is driving three times faster than Joe and it takes them three hours to be 120 miles apart, how fast is Bill driving?

    asked on October 14, 2017
  16. Health

    1. The functions of the respiratory system are (choose 2) A. to pump blood to the body** B. to deliver oxygen to the body** C. to remove carbon dioxide from the body D. to absorb nutrients 2. ______ is a substance in tobacco products that causes stained

    asked on February 19, 2016
  17. consumer math

    You owe $1,350.00 on a credit card with a 14.25% APR. You pay $300.00 at the beginning of the month. How much interest do you save by paying at the beginning of the month versus at the end of the month? second part: Imagine you put the $300 in a savings

    asked on April 30, 2012
  18. Geometry

    To the nearest degree, what is the measure of the smallest angle of a right triangle whose legs measure 9 and 15?

    asked on February 27, 2012
  19. geometry

    Solve y= 5/8b+10 for b

    asked on September 6, 2011
  20. chemistry

    Hi, I need help figuring out this question. An impure sample of barium hydroxide, Ba(OH)2 (aq), has a mass of 0.540 g. It is dissolved in water and then treated with excess sulfuric acid, H2SO4(aq). This results in the formation of a precipitate of barium

    asked on April 27, 2019
  21. Chemistry

    At 125 degrees Celsius, the pressure of a sample of He gas is 345 mmHg. At what temperature degrees Celsius will the pressure become 690 mm Hg, if the volume remains constant?

    asked on July 28, 2013
  22. math

    how many 4 number combinations can there be from 0-99 without repeating a number?

    asked on September 7, 2012
  23. ss


    asked on June 6, 2016
  24. chemistry

    Calculate the H3O+ concentration at the halfway point when 34.5 mL of 0.19 M HBr is titrated with 0.1 M KOH. Assume additive volumes. Answer in units of M.

    asked on February 5, 2019
  25. geometry

    quadrilateral ABCD has right angles at B and D. If ABCD is kite-shaped with AB=AD=20 and BC=CD=15, find the radius of the circle inscribed in ABCD.

    asked on December 4, 2011
  26. Science

    How would renewable energy sources be used in a home?

    asked on March 3, 2014
  27. Chemistry

    When carbon is burned in air, it reacts with oxygen to form carbon dioxide. When 25.2 of carbon were burned in the presence of 80.6 of oxygen, 13.4 of oxygen remained unreacted. What mass of carbon dioxide was produced?

    asked on September 24, 2012
  28. Math HELP!

    A Lights-A-Lot quality inspector examines a sample of 25 strings of lights and finds that 6 are defective. a. What is the experimental probability that a string of lights is defective? b. What is the best prediction of the number of defective strings of

    asked on February 17, 2016
  29. calculus

    The point on the curve for y = sqrt(2x+1) at which tangent is perpendicular to the line y = -3x + 6 is.... a. (4, 3) b. (0,1) c. (1, sqrt3) d. (4, -3) e. (2, sqrt 5) I'm not sure, but do you find the perpendicular slope (1/3) set that as dy/dx and solve

    asked on January 24, 2012
  30. Physics

    Any help direction is appreciated. Inez is putting up decorations for her sister's quinceanera (fifteenth birthday party). She ties three light silk ribbons together to the top of a gateway and hangs from each ribbon a rubber balloon. To include the

    asked on January 24, 2015
  31. Business Communication

    Which of the following would be classified as an informative or positive message? a) A request for information b) An announcement of a policy that reduces benefits c) A memo for the file recording actions and rationales d) A letter to an employer

    asked on February 24, 2011
  32. math

    You select 10 cards randomly from a deck of 52 cards. What is the probability that all of the cards selected are face cards (i.e. jacks, queens, or kings)?

    asked on September 20, 2010
  33. Physics

    A physics student uses a ramp to slide a 350 kg piano onto the back of a pickup truck. The box on the back of the truck is 81 cm above the ground and the planks are 3 m long. An average force of 1500 N is required to slide the piano up the planks. a)

    asked on April 11, 2019
  34. Math

    Lian uses 200 tegular paces to walk around a square park.if one pace of lian measures 40 cm,what is the measure of each side of the park

    asked on November 23, 2017
  35. Algebra URGENT! Conic sections

    A spacecraft is in a circular orbit 150 kilometers above Earth. Once it attains the velocity needed to escape the Earth's gravity, the spacecraft will follow a parabolic path with the center of Earth as focus. Suppose the spacecraft reaches escape velocity

    asked on March 18, 2014
  36. math

    tickets for a school play cost $4 for adults and $2 for students at the end of the play the school sold a total of 105 tickets and collected $360 how much of each type of tickets did they sell

    asked on March 31, 2014
  37. math

    If sinθ=7/13 and cosθ=12/13 find tan θ and cot θ Use Pythagorean Identities to find sin θ and tan θ if cos θ =-24/25 if the terminal side of θ lies in the third quadrant.

    asked on January 14, 2019
  38. statistics

    Two percent of the circuit boards manufactured by a particular company are defective. If circuit boards are randomly selected for testing, the probability that the number of circuit boards inspected before a defective board is found is greater than 10 is

    asked on March 29, 2010
  39. Math

    List the terms without changing the expression. 21x+21y

    asked on April 5, 2012
  40. Chemistry

    Note- I do not want the answers. I just need to know how to set up each.. The combustion of isopropyl alcohol (Molar Mass=60.1 g/mole) is described by the following balanced equation: 1 C2H8O + 9 O2 (g) -> 6 CO2 (g) 8H2O (l) + 4012 kJ of heat energy a) How

    asked on October 26, 2016
  41. Math

    diondre purchased a car for $22000. assuming the value of the car depreciates at a rate of 6% per year, approximately what will be the value of the car after 6 years

    asked on April 26, 2016
  42. statistics

    Two percent of the circuit boards manufactured by a particular company are defective. If circuit boards are randomly selected for testing, the probability that the number of circuit boards inspected before a defective board is found is greater than 10 is

    asked on March 29, 2010
  43. Math

    Jack has 99 hot dogs and 261 hot dog buns. He wants to put the same number of hot dogs and hot dog buns on each tray. What is the greatest number of trays Jack can use to accomplish this?

    asked on February 27, 2010
  44. Math

    The House of Representatives has 435 members. If a committee has a prime number of members, and that number is a factor of 435, then how many members can be on the committee?

    asked on August 22, 2011
  45. science

    Suppose you hang an object of weight W by a string from a hanging spring scale, such as the kind used in some grocery stores. You then hang the scale with the object from the ceiling of an elevator. When the elevator is standing still, the scale will read

    asked on April 8, 2013
  46. English help

    "We can easily forgive a child who is afraid of the dark; the real tragedy of life is when men are afraid of the light" what does this quote mean?

    asked on October 4, 2015
  47. physics

    A man seeking to set a world record wants to tow a 104,000-kg airplane along a runway by pulling horizontally on a cable attached to the airplane. The mass of the man is 93 kg, and the coefficient of static friction between his shoes and the runway is

    asked on November 17, 2013
  48. Math

    The half-life of carbon-14, which is used in dating archaeological finds, is 5730 yr. Assume that 100% of the carbon-14 is present at time 0 yr, or x=0. Write the equation that expresses the percentage of carbon-14 remaining as a function of time.

    asked on October 11, 2011
  49. physics

    Calculate the percentage of Earth’s gravitational force on the ISS astronauts while orbiting at an altitude of 248 miles above Earth’s surface.

    asked on January 28, 2014
  50. Physics

    A particle is initially moving along the positive x-axis at a speed of 9.90 m/s. After 2.40 s, the particle is moving along the negative y-axis at a speed of 4.71 m/s. Find the x and y components of the particle's acceleration.

    asked on January 31, 2012
  51. Math

    Solve z= 9/13c for c

    asked on August 15, 2011
  52. geometry

    the figure below represents a building in the shape of a pentagon. using the scale 1 inch= 94 feet, what is the perimeter of the building?

    asked on August 15, 2011
  53. Physics

    -Use upward as positive and 10.0 m/s2 for the magnitude of g. -Let us say that you toss an object upwards at 5.0 from a height of 17.0 m. 1.)What is in m/s2 the acceleration of the object the moment it reaches the highest position? 2.)What is in m/s2 the

    asked on September 3, 2014
  54. ap chemistry

    A sample of gas in a cylinder of volume 4.2 L at 316 K and 2.68 atm expands to 7.21 L by two different pathways. Path A is an isothermal, reversible expansion. Calculate the work for Path A. Answer in units of J Path B has two steps. In the first step, the

    asked on October 8, 2012
  55. Calculus

    What are the y-intercept and x-intercept of y= x-1/x^2-2x+5

    asked on October 1, 2019
  56. algebra

    if f(x) = 5x + 4 find f(1)

    asked on November 14, 2017
  57. Social (ms.sue or writeteacher)

    What are the: -similarities -differences -conflicts and reasons between men and women your answers are very much appreciated

    asked on November 4, 2013
  58. Chemistry

    "There are two ions per formula unit in this compound. The -1 anion has 8 more electrons than the cation." I need to find the Chemical formula/name. Any suggestions on how to start? This can have more than one correct answer.

    asked on October 15, 2007
  59. Pre-calculus

    1)Which term best describes the linear programming situation represented by x+y=2 why is the answer infeasible? 2)Describe the linear programming situation for this system of inequalities. x < 1 y > 0 3x + y < 5 why is the answer unbounded?

    asked on April 8, 2012
  60. physics

    There is a 1500 mile race course. I MUST have a top speed of 36 meters/s (meaning I cannot go over 36). The max foward acceleration is 4 m/s squared and the max backward acceleration is 6 m/s squared. I start at 600m and must go to the 800m mark (I must

    asked on March 14, 2011
  61. physics

    There is a 1500 mile race course. The max foward acceleration is 4 m/s squared and the max backward acceleration is 6 m/s squared. I start at 600m and must go to the 800m mark (I must travel 200m). What is an equation for the fastest time that I could get

    asked on March 14, 2011
  62. Business Communication

    Indicate the alternative that both correctly evaluates the following sentence and correctly explains the reason for the evaluation. “As soon as you provide your date of birth on Line 2, your application for a flexible spending account will be

    asked on February 24, 2011
  63. statistics

    In a batch of 97 computer diskettes, 8 are defective. A sample of six diskettes is to be selected from the batch.How many of the samples consist of all defective diskettes?

    asked on February 20, 2011
  64. math

    The math team in addville travled to subtractville for a math compertition. The bus averaged 40 mph from addville to subtractville but adveraged 60 mph during the return trip. What was the adverage speed of the bus for the entire trip? Thats the story

    asked on September 28, 2008
  65. calculus

    Use a sign chart to determine the intervals on which f(x)=4x^3-x^4 is concave up and concave up and concave down, and identify the locations of any inflection points.

    asked on January 22, 2017
  66. calculus

    Determine the intervals on which f(x)= x+(4/x) is increasing and decreasing. Find the coordinates of any max or min points.

    asked on January 22, 2017
  67. secondhand lions essays

    I have to write a typed (doubled spaced)1 page essay on each of the following ... Discuss the scenes where the boy speaks his own opinion what do these scenes tell you about the boy? How did the decisions made for the boy affect the boys life? How does

    asked on July 24, 2005
  68. Math help

    Mt. Everest is more than 8000 m high. How fast would an object be moving if it could free fall to sea level after being released from an 4750-m elevation? (Ignore air resistance) How would I solve this?

    asked on September 30, 2015
  69. Pre calculus

    A tugboat is traveling at 30 miles per hour at a compass heading of 38 degrees. The current is from the direction of 125 degrees moving at 7 mph. Find the resultant speed and the direction of the boat. I understand the concept and that I must use the law

    asked on February 16, 2015
  70. Maths

    5. You have inherited an orange grove. The more orange trees there are in the grove, the fewer oranges each tree produces. When there are 30 trees, each tree produces 84 kg of oranges. When there are 90 trees, each tree produces 74 kg of oranges. Assume

    asked on May 15, 2014
  71. math

    A triangular pyramid has a triangle base of 24 cm, triangle height of 16 cm, and a pyramid height of 14 cm. what is the volume of triangular prism.

    asked on February 12, 2012
  72. 8th grade

    what vegetable has these letters? HARBRUB?

    asked on September 14, 2010
  73. 5th grade social studies

    Who were some of the famous explorers of 1450-1763???

    asked on April 15, 2009
  74. 5th grade social studies

    What was the french and indian war about?

    asked on April 15, 2009
  75. English

    I'm writing a review and want to say that "xxx is what pushes the story forward" but with a more elegant and correct formulation. English is not my first language so I don't know all the expressions and such but I think that there is a proper expression

    asked on September 18, 2008
  76. math

    alexander had some nickles in his bank. he added 3 dimes to the bank and then he had 85 cents.how many nickles did he have left? write an equation and work backward to solve.

    asked on November 6, 2007
  77. calculus

    Use the derivative f'(x0= x^4-1 to find the local extrema and inflection points of f.

    asked on January 22, 2017
  78. Quick English check

    Please correct me if I'm wrong! The VAST area of the artic seabed may have fossil fuel resources, but the costs to claim them are currently prohibitive. But that does not keep news organizations from INTIMATING that Russia is attempting a land grab. The

    asked on September 27, 2015
  79. English

    Use myriad minutia nominal ponderous and vast in these sentences. Correct me if I'm wrong! 1. I am burdensome. (Ponderous?) 2. I am a great host. (Myriad?) 3. I am the least acceptable amount. (Nominal?) 4. I am the tiny details that are sometime easy to

    asked on September 27, 2015
  80. maths

    find the perimeter of a rectangle whose sides are 3x+y and 7x+2y

    asked on January 10, 2015
  81. Chemistry

    how do i know which compounds to put the roman numeral in?

    asked on November 20, 2013
  82. algebra

    Coco's coffee charges different prices based on the number of pounds purchased. The pricing scale is modeled by the function below, where w is the weight in pounds purchased. Orders placed directly through the Web site are discounted by 1/3, but a shipping

    asked on July 13, 2012
  83. Algebra & Trig

    at a throwing speed pf 12.2 meters per seconds,what is the angle that produce a distance of 13 meters

    asked on July 4, 2012
  84. s.s.

    Why was the aztec civilization considered warlike?

    asked on May 19, 2012
  85. science

    what is a change in position

    asked on June 1, 2010
  86. social studies/history

    20 example/ways the govt. of north korea control the country and the people

    asked on January 18, 2010
  87. Economics

    Is the airline business considered to be a monopoly or oligolply? it's an oligopoly, I think. If you think about it that's more likely. Good question by the way. Tom is right. Please check these sites for more information.

    asked on November 17, 2006
  88. math

    June earns $13650 dollars in a year. She has to pay 12.5% tax on this amount. How much tax does she pay?

    asked on June 12, 2017
  89. calc

    If f is the focal length of a convex lens and an object is placed at a distance p from the lens, then its image will be at a distance q from the lens, where f, p, and q are related by the lens equation 1f=1p+1q What is the rate of change of p with respect

    asked on March 3, 2017
  90. Maths

    Harry is 33 years older than his son, Ben. in 4 years Harry will be twice as old as Ben. How old is Ben? What I have so far: NOW B=Ben's age B+33=Harry's age IN 4 YEARS B+4 B+33+4

    asked on March 1, 2017
  91. Math

    What's -6 + 2/12? Could you please show your steps? Thank you! :)

    asked on November 3, 2015
  92. Quick English check

    Please correct me if I'm wrong! Canada, Denmark, Russia, Norway, and the USA are the five countries with territorial claims to the artic seabed. The EXTENSIVE (as compared to the other claimants) Denmark has already submitted its claim to be reviewed for

    asked on September 27, 2015
  93. Homework

    By forming tough,inactive cysts,Giardia... A.Survives in unfavorable conditions B.Gets energy from the sun C.Maintains a constant temperature D.Responds to stimuli,sun as chlorine

    asked on March 25, 2015

    Essentials of Human Anatomy & Physiology (10th Edition) by Marieb, Elaine N power point notes (that summarize this particular textbook). Please help me I'll really appreciate that. I'm having a hard time looking for it.

    asked on November 29, 2014
  95. Science

    GCSE Physics-Forces affecting falling objects. My falling object is a skydiver Can you please help me to find the information needed? Nothing too complicated please. Here is a list of things I need to include but I have no idea where this information can

    asked on May 4, 2014
  96. Math

    An appliance is on sale at 30% discount. If the sale price is $42.00, what was the original price of the appliance?

    asked on December 15, 2013
  97. Algebra & Trig

    calculate the velocity of 10 meters per second with an angle of 30 degrees

    asked on July 4, 2012
  98. Math

    Find each quotient. A. 7/3 ÷3 1/2 B. 5/6 ÷ -18

    asked on March 4, 2010
  99. Math- Calculus

    Find an equation of the line that is tangent to the graph of f and parallel to the given line Function: f(x) = x^3 Line 3x-y+1 = 0 ._.; I know the derivative of the function is 3x^2 and I do have the answer in the back of my book just need the way to get

    asked on August 26, 2007
  100. Math

    If I had five pies and my friends are 3and I made20 more how many pies what I have left after you add two more

    asked on May 22, 2017


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