Popular questions and responses by valerie
  1. physics

    the speed of a cyclist reduces uniformly from 2.5 m/s to 1.0 m/s in 12 s. (a) calculate the deceleration of the cyclist. (b) calculate the distance travelled by the cyclist in this time

    asked on October 31, 2010
  2. Geometry

    On a rectangular piece of cardboard with perimeter 11 inches, three parallel and equally spaced creases are made. The cardboard is then folded along the creases to make a rectangular box with open ends. Letting x represent the distance (in inches) between

    asked on January 21, 2011
  3. present value

    An investment pays you $20,000 at the end of this year, and $10,000 at the end of each of the four following years. What is the present value (PV) of this investment, given that the interest rate is 4% per year?

    asked on April 3, 2015
  4. Physics

    A single-turn square loop of side L is centered on the axis of a long solenoid. In addition, the plane of the square loop is perpendicular to the axis of the solenoid. The solenoid has 1490 turns per meter and a diameter of 6.00 cm, and carries a current

    asked on April 7, 2013
  5. Chemistry

    What is the pH of a 0.50 M solution of NaNO2 if the Ka of H20x = 4.5 x 10^-4. I know that you use the Ka to find Kb and solve from there, but why?

    asked on September 26, 2012
  6. math

    Find the center, vertices, and foci of the ellipse with equation 3x^2 + 8y^2 = 24.

    asked on September 1, 2016
  7. Physics

    To construct a solenoid, you wrap insulated wire uniformly around a plastic tube 12 cm in diameter and 45 cm in length. You would like a 2.0-A current to produce a 2.1-kG magnetic field inside your solenoid. What is the total length of wire you will need

    asked on March 24, 2013
  8. Physics

    In Oersted's experiment, suppose that the compass was 0.30 m from the current-carrying wire. If a magnetic field of 1/3 the Earth's magnetic field of 5 10−5 T was required to give a noticeable deflection of the compass needle, what current must the wire

    asked on March 24, 2013
  9. Math

    Mrs. Klein made some tarts. She sold three fifths of them in the morning and one fourth the remainder in the afternoon. If she sold 200 more tarts in the morning than in the afternoon how many tarts did she make?

    asked on February 7, 2012
  10. Physics

    Consider the RL circuit shown in the figure, where R = 5.0 Ω and L = 4.6 H. How much energy is stored in the inductor after the switch has been closed a long time? I would know how to do this if they actually gave me a value for time, but I'm lost now.

    asked on April 14, 2013
  11. math

    Consider the sequence of steps to solve the equation: 5(x - 3) = 7x 2 Step 1 ⇒ 10(x - 3) = 7x Step 2 ⇒ 10x - 30 = 7x Step 3 ⇒ 3x - 30 = 0 Step 4 ⇒ 3x = 30 Step 5 ⇒ x = 10 Identify the property of equality which yields Step 5. I'm thinking

    asked on October 22, 2019
  12. Mathematics

    Can anyone check my answers please True or false 927 is divisible by 3 and 9 true 13,012 is divisible by 9 false 7,434 is divisible by 6 true 2,064 is divisible by 2,4,and8 true 96,240 is divisible by 2,3,5, and 10 true Am I right?

    asked on September 15, 2017
  13. Math

    Two sides of a triangle measure 7 cm and 15 cm . Which of the following could not be the length of the third side ? A. 5 cm B. 9 cm C. 15 cm D. 22 cm I'm confused because at first I tried Pythagorean thereom and it didn't really work .

    asked on June 3, 2014
  14. Statistics

    Blossom's Flowers purchases roses for sale for Valentine's Day. The roses are purchased for $10 a dozen and are sold for $20 a dozen. Any roses not sold on Valentine's Day can be sold for $5 per dozen. The owner will purchase 1 of 3 amounts of roses for

    asked on August 6, 2013
  15. Chemistry

    I am trying to answer my questions for thermal decomposition of malachite lab. I have moles of malachite in 1g= 0.0045 moles of Cuo produced= 0.0009 ratio of moles of Cuo produced per moles of malachite decomposed=0.0045/0.0009=5.1 the balanced euation =

    asked on September 27, 2009
  16. Mathematics

    You decide you will buy a stock only if it shows an overall increase over the next 30 days. The first 10 days, it has an average daily increase of 0.30. The next 10 days it has an average daily decrease of 0.45. The last 10 days, it has an average daily

    asked on September 12, 2017
  17. English

    What is one theme, or central of "Two Kinds"? Persistence is the key to success High expectations are the key to success Discovering one's own goals and desires is an important part of growing up A family cannot be happy unless the children obey and

    asked on September 8, 2017
  18. Math Ms. Sue help me

    What does it mean to say that a number is a perfect square? Give one example of a number that is a perfect square and one that is not. Can you plz help me?

    asked on November 14, 2016
  19. sign language

    can someone help me with sign language please!! 1)_____ of the American Manual Alphabet hand-shapes are formed to resemble the letter they represent A)All B)some C)None 2)what are two main parts of forming signs? A) forming words with your lips and

    asked on October 18, 2016
  20. Science

    what steps are important in the process of creating a scientific theory A) Hypothesizing,observing,and testing. B) Creating a prototype and trouble-shooting. C) Analyzing,Offering an opinion, and evaluating D) Trouble-shooting,hypothesizing,and evaluating.

    asked on October 3, 2016
  21. Math Help!!

    You roll a standard cube once. Find P(0) a) 7/6 b) 1 c) 1/2 d) 0

    asked on May 20, 2016
  22. Finance

    Suppose you own $1 million worth of 30-year Treasury bonds. Is this asset riskless?

    asked on March 6, 2013
  23. Mathematics

    When you are translating a number from scientific notation to standard form, what does the exponent tell you? The number of zeros to add to the end of the original number the number of places to move the decimal point to the left the number of places to

    asked on September 26, 2017
  24. College Algebra

    Deer Valley determined that the cost of these apples was 64 cents per pound. 1. What would be the selling price per pound for the prepackaged apples using a 30% markup based on cost? A 40% markup? A 50% markup? 2. Based on the national average for apples

    asked on December 17, 2015
  25. Physics

    There is an 8 meter tall hill with a circular radius of 20 meters. What is yhe minimum speed a car needs to momentarily lose contact with the road?

    asked on March 1, 2015
  26. CHM

    Consider the following reaction: HCN H+ + CN- delta H = 315kJ If 1.00 mole of CN- in the form of NaCN was added to equilibrium mixture, describe the effect on [H+], [HCN], [CN-], pH, and heat.

    asked on April 16, 2013
  27. Economics

    5. If the average adult produces $90,000 of output per year, how much output is lost as a result of adult deaths from secondhand smoke, according to the News on page 74? $

    asked on November 23, 2012
  28. Science

    Xylem dries up and dies what is the effect

    asked on September 19, 2012
  29. Math

    Tell whether the quantity is constant or variable. 1. The price per gallon of gasoline. 2. The distance between Chicago and Boston. I need explanation for each also.... Thank you!

    asked on April 22, 2011
  30. AP Calculus AB

    A farmer wants to create a rectangular pen, which will be divided into six separate sections, as shown in the accompanying diagram. If he has 600 feet of fencing to use, what outside dimensions will maximize the area of the pen?

    asked on December 12, 2010
  31. science

    fallow a drop o water through three states of matter. describe what is happening to the molecules as the water turns to gas than describe what is happening to the molecules when the water freezes into ice

    asked on March 4, 2008
  32. Social Studies

    Which territorial acquisition- excluding the original United States-- added the greatest number of states to the nation? Gadsden Purchase THIS ONE Louisiana Purchase Mexican Cession Oregon Territory Which of the following best describes the impact of

    asked on January 24, 2019
  33. Math

    Mali-li has 7 1/2 yd of material. Her new skirt will take 4 5/8 yd. How much material will she have left after the skirt is made? 2 7/8 My answer 2 1/8 3 1/8 3 7/8 73 in. =___ ft 776 ft 6 1/2ft this one 8ft 7 1/4

    asked on October 23, 2017
  34. Math

    Sarah flipped a pair of coins 60 times on 24 occasions, heads appeared on both coins. How is this outcome different from the expected outcome? It occurred 9 more times than expected it occurred 4 more times than expected It occurred 6 fewer times than

    asked on September 10, 2017
  35. Math

    Simplify the polynomial 2x^2 + 6x - 7x + 8 - 3x^2 + 1 A)2x^2 + x + 9 B)-2x^2 - x - 9 C)-x^2 - x + 9 D)x^2 + 9 Please help me

    asked on June 12, 2017
  36. Chemistry 212

    The isotope sodium-22 has a half life of 2.60 years. What is the 1st order rate constant in inverse years? I am using the Ln (A/A0) = -Kt formula. Is that correct?

    asked on May 5, 2017
  37. Science Ms. sue help

    what is the function of a cell wall A) to Protect and support the cell B) to preform different functions in each cell C) to prevent water from passing through the cell D) to prevent oxygen from entering the cell. Help!!!!

    asked on November 15, 2016
  38. math

    What is the solution to r/-3=12?

    asked on September 21, 2016
  39. Math

    What is the solution to 5q=-75? Please Help

    asked on September 21, 2016
  40. Language Arts Help!!

    10 MS. SMITH: {glossing over his misbehavior and adopting a serious tone as she hands Jason a piece of paper} Yes, ok. So, tell me your plan for the project. Have you consulted this project list yet? You really need to quit putting this off. You're the

    asked on May 25, 2016
  41. math

    Danny has 75 marbles in red color and blue color. He found out number of red marbles is 15 less than twice of the blue marbles. What are the numbers of red and blue marbles does danny have?

    asked on April 3, 2013
  42. Physics

    A parallel-plate capacitor is made from two aluminum-foil sheets, each 3.90 cm wide and 10.3 m long. Between the sheets is a mica strip of the same width and length that is 0.0225 mm thick. What is the maximum charge that can be stored in this capacitor?

    asked on February 24, 2013
  43. Precalculus

    5. A water wheel has a radius of 60 feet, and the center is 14 feet above the water level. The water wheel makes a complete rotation every 45 minutes. A specific cup starts at the top of the wheel. Write a sine equation to model the above water wheel.

    asked on January 11, 2013
  44. thermochemistry

    A chemical reaction takes place in a container of cross-sectional area 100 cm2 . As a result of the reaction, a piston is pushed out through 19 cm against an external pressure of 596 torr. What is the value for w for this reaction?

    asked on October 14, 2012
  45. science

    Ions are electrically charged particles that are formed when certain compounds are dissolved in water. These solutions will conduct electricity. The Swedish scientist Svante Arrhenius coined the term ion (which means wanderer) to explain why solutions of

    asked on January 18, 2012
  46. science

    Chemical fertilizers stimulate plant growth; but if the concentration is too high, they may damage roots. What precautions concerning chemical fertilizers must a gardener take?

    asked on January 18, 2012
  47. Statistics

    How do you solve this? 28!/(28-28)!28! * 0.88^28 *0.12^28-28 I need help on how to solve this on a graphing calculator(TI-83 Plus) Can you help me? Please show step by step instructions! Thank you!!!

    asked on October 25, 2011
  48. Math

    If each angle of a regular polygon measures 140 degrees, how many sides does it have?

    asked on March 26, 2011
  49. chemistry

    35.0 g of an organic compound dissolved in 500. g of water have a freezing point of -3.72 degrees C. What is the molecular weight of the solute?

    asked on February 14, 2011
  50. College Algebra

    #3 Choose the end behavior of the graph of the polynomial function. f(x) -x(x-3)(5x+2), I think I have to foil to get -5x^3-2x^2+15x+6 So I think this one rises to the left and falls to the right. Please let me know if I did these correctly. Thanks

    asked on January 22, 2011
  51. College Algebra

    Choose the end behavior of the polynomial function. f(x)= -5x^5-9x^2+6x+1. I got left end up right end down. Is this right? Thanks

    asked on January 22, 2011
  52. Geometry

    Ok Dr. Russ helped me find one part of the question, but I still can't figure out the values of x that maximizes volume = in. Any help is appreciated. Thanks On a rectangular piece of cardboard with perimeter 11 inches, three parallel and equally spaced

    asked on January 21, 2011
  53. Math

    Why did Airhead eat the dollar he brought to school

    asked on October 26, 2010
  54. Trig

    Find the general solution for the equation 4tanx+cotx=5?????? and the steps please? THANYOO!

    asked on October 18, 2010
  55. maths

    Here are some expressions 1)pir^2l 2)2pir^2 3)4pir^3 4)abrl 5)abl over r 6)3(a^2+b^2)r 7)pirl The letters r, l, a and b represent lengths. pi, 2, 3 and 4 are numbers that have no dimensions. Three of the expressions represent volumes. Which ones are they?

    asked on December 17, 2009
  56. Chemistry

    1. name one structural and one chemical difference between acetylene and ethylene. give rasons. 2. why is the benzene much less reactive than 1, 3,5-cyclohexatriene? 3. What causes cycloalkanes to have two less hydrogen atoms than similar alkanes that are

    asked on October 10, 2009
  57. English

    We must truly become our brothers’ and sisters’ keepers. Is this written correctly? OR should it be We must truly become our borther's and sister's keepers. OR We must truly become our brother and sisters' keepers. Because the statement applies

    asked on December 28, 2006
  58. Math

    Hillary buys 3 pounds of Gala apples and some Granny Smith apples. Both kinds of apples cost $4.50 per pound. The total cost is $24.75. How many pounds of Granny Smith apples did Hillary buy? Write and solve an equation.

    asked on January 5, 2019
  59. Ap chemistry

    a sample of radioactive iodine (half life=3 days) originally weighed 10 g, but now weighs 0.625 g. How old is the sample?

    asked on December 12, 2018
  60. Programming Java

    I am learning Java in programming right now. I need to write a program that should have an output like this: The program says "Type ten names". Then ten names sould be typed a person. Then the program chooses a random name from the list and displays it on

    asked on November 16, 2017
  61. Math

    Find the value of this integer expression: -2(+3+-4+-8++7) Calculate in distributions and without distribution. There are suppose to be an exponent with +3 and when you see ++7 there is suppose to be an exponent.

    asked on November 10, 2017
  62. History

    What were Alexis de Tocqueville contribution to his time period and also what contribution did he make to there character of America?

    asked on November 5, 2017
  63. Math

    Can anyone check this and see if I'm right? A crafts store bought 27 1/4 ounces of potpourri. The shop divides the potpourri into 2 1/2 ounce bags and sells each bag for $4.25. a. how many full 2 1/2 ounce bag of potpourri can the shop make. b. if all the

    asked on October 23, 2017
  64. Math

    Estimate these 14/16 + 1/5 2 0 1/2 1 This one 5 2/11 - 3 2/18 3 1 This one? 4 2 7 1/13 * 4 15/17 28 35 this one 48 40 I'm not very positive with the last two answers.

    asked on October 23, 2017
  65. Math

    Are there any problems in this? -3 1/5 / -2/3 = -4 4/5 Here is the work it showed. -3 1/5 / -4 4/5=-16/5 * -3/2=-8/5 * -3/1 = -24/5= -4/5 To me, I think there is something wrong in this the answer suppose to be positive, not negative. The only thing that I

    asked on October 23, 2017
  66. Science

    This is what the chart talks about. A Melt 1 cup of butter chop an onion mix ingredients in a large bowl B Brown the meat in a frying pan boil 6 eggs bake at 350 degrees kendra was looking at recipes in a cookbook. she divided some of the steps of a recipe

    asked on October 20, 2017
  67. Science

    How does the amount of substance affect the rate at which temperature changes? I will like someone to explain this to me, please.

    asked on October 18, 2017
  68. Languege

    Which sentence uses coordinates adjectives? Mario gazes at the large painting of the beautiful lake. Mario gazed at the lake and the beautiful painting. Mario gazed at the large, beautiful painting. Mario gazed at the beauty of the large painting. 2.Which

    asked on October 16, 2017
  69. Math

    Name the subset of the real numbers to which each number belongs divided 113

    asked on October 16, 2017
  70. Social Studies

    Where in North America did the Mound Builders live? in the Southwest in the Northwest in the Central Mexico in eastern North America THIS ONE Which statement best describes the agriculture of the Mayas Each year, they rotated the kinds of crops planted.

    asked on September 27, 2017
  71. Mathematics

    1.What is 10^3 written in standard form 10 100 1,000 10,000 Please check this, my answer will be the third choice

    asked on September 22, 2017
  72. Science

    What is the goal of technology to understand the natural world to improve how devices operate to improve how people live THIS ONE to understand how systems operate What is a factor that limits a technological design a prototype a trade-off a constraint

    asked on September 19, 2017
  73. Mathematics

    order of operation 16 divided by 4 . 2= I just did 16 divided by 4 which is 4 then multiply it by 2 which is 8 Am I right

    asked on September 16, 2017
  74. Mathematics

    CHECK MY ANSWERS PLEASE 1.9 squared is equivalent to ___ 18 9^2 81 both b and c this one

    asked on September 15, 2017
  75. Mathematics

    Can anyone check my answers please True or false 927 is divisible by 3 and 9 true 13,012 is divisible by 9 false 7,434 is divisible by 6 false 2,064 is divisible by 2,4,and8 false 96,240 is divisible by 2,3,5, and 10 false Am I right?

    asked on September 15, 2017
  76. Math

    Amy is making a drawing of different things in her neighborhood. One house she drew is 30 feet wide. Her scale drawing of the house is 5 inches wide. Which of the following uses the same scale Amy used to draw this house. A 54 foot-tall water tower is

    asked on September 10, 2017
  77. Chemistry

    How are the three types of intermomecular forces similar? How are they different?

    asked on July 17, 2017
  78. math

    Explain how to write a function rule from the table below. Then write a function rule. X -2, -1, 0, 1, 2, Y 2.8, 3.4, 4, 4.6, 5.2 Please help

    asked on June 14, 2017
  79. math

    A 128-lb person burns 320 calories per hour riding an exercise bicycle at a rate of 10 mi/hr. a) Write a function rule to represent the total calories burned over time by that person. b) Explain how the information in the problem relates to the function.

    asked on June 14, 2017
  80. Math

    List three different ways to write 5^11 as the product of two powers. Explain why all three of your expressions are equal to 5^11 Need some help Please!!

    asked on June 9, 2017
  81. Math

    Complete the following task in your discussion group: Create two different situations: one in which you use combinations and one in which you use permutations. Include specific details and an explanation about what makes each situation either a combination

    asked on May 11, 2017
  82. Chemistry 212

    The isotope californium-252 has a half life of 162 days. How many days would it take for 61.7% of the original material to decay? I am using the equation t= (ln(nt/no))/ k and I am first solving for K using: k=(.693/t1/2) the suppose answer can range from

    asked on May 6, 2017
  83. Science

    1.What challenges does [your topic] pose to biodiversity? 2.What do you think should be done and why? Can someone help me plz!! i have to write a discussion.

    asked on April 3, 2017
  84. Science

    Discuss your opinion of the consequences of artificial selection and the advantages and disadvantages of using genetic information in society. Use facts from your research to support your opinion. Cite the sources for your facts. Also, discuss your answer

    asked on March 7, 2017
  85. Math

    jason weighs 36 pounds together he and his sister weigh four ponuds more than three times the weight of his sister what is the weight w of jason's sister? 36+ w= 3; 18 pounds 36+ w- =3w; 19 pounds 36+ w= 3w+4; 16 pounds 36+ w= 3w -4; 20 pounds

    asked on January 27, 2017
  86. help with trigonometry??

    Jacob is standing 112 m from a building. The angle of elevation when he looks up to the top of the building is 62°. How tall is the building? I don't really understand how to solve this, please help!!

    asked on January 24, 2017
  87. Math

    45 Over 180 *360

    asked on January 16, 2017
  88. Geometry

    In abc, if ab =11 cm and bc =13 cm, what is the possible range of values for ac?

    asked on December 16, 2016
  89. Math

    Carlita saw 5 times as many robins as cardinals while bird watching. She saw a total of 24 birds. How many robins did she see than cardinals?

    asked on November 29, 2016
  90. Math

    when adding /25 and -9 which type of number is the sum? Plz help me

    asked on November 14, 2016
  91. Social Studies

    Throughout the 1900s, many countries in Africa and Asia gained independence from European colonial powers. India is one of these countries, having gained their independence from Britain in 1947. Why did people in India want independence? In what ways was

    asked on November 10, 2016
  92. Math

    How can knowing associative property help you compute 2x8x2 mentally

    asked on October 26, 2016
  93. Math


    asked on October 19, 2016
  94. Math

    Explain the difference in meaning between |-3| and -3. Plzz Help me on this!

    asked on September 29, 2016
  95. Math hellppp!!

    how do you simplify this expression -12/3*(-8+(-4)^2-6)+2 Plzzz Help plzz!!

    asked on September 29, 2016
  96. Social Studies

    What is one change Mansa Musa brought to Mali? A) He sent all of the scholars out of the empire. B) He brought Christianity to the empire. C) He made Islam the empire's official religion. D) He gave the provinces their independence Plzzz!!!! Help Me Plzzzz

    asked on September 21, 2016
  97. Math

    BD bisects

    asked on September 13, 2016
  98. Reading Help!!

    Are there any books that are about greedy people that change? Other than Christmas Carol because I'm trying to write a compare and contrast paragraph.

    asked on May 24, 2016
  99. Reading

    What are some books that are about greedy people who change for the better?

    asked on May 20, 2016
  100. Math

    Shelly is working 250 math problems and she wants to finish in 6 days. If she works the same number of problems each day for 5 days how many problems will she have left to work on day 6?

    asked on March 21, 2016


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