Most popular questions and responses by Cathy
  1. Physics

    You are given vectors A = 5.0i - 6.5j & B = -3.5i + 7.0j. A third vector C lies on the xy-plane. Vector C is perpendicular to vector A, & the scalar product of C with B is 15.0. From this information, find the components of vector C.

    asked on June 23, 2013
  2. Math

    At Laurita's bakery 3/5 of the baked goods are pies and the rest are cakes. 1/3 of the pies are coconut. 1/6 of the cakes are angel-food. What fraction of all of the baked goods at Laurita's Bakery are coconut? What fraction of all the baked goods at

    asked on March 6, 2017
  3. Algebra

    Two children balance on opposite ends of a seesaw. One child weighs 45 pounds and the other weighs 38 pounds. The distance between them is 10 feet. What is the distance of each child from the fulcrum (the center balance point of the seesaw)? (HINT: The

    asked on May 9, 2012
  4. STAT

    A student takes a ten-question true-false quiz, but did not study and randomly guesses each answer. Find the probability that the student passes the quiz with a grade of at least 70% of the questions correct

    asked on February 20, 2015
  5. physical science

    A horse galloped a mile in 2 min 35s. What was its average speed in km/h?

    asked on July 5, 2012
  6. math

    in a geometric series t1=23,t3=92 and the sum of all of the terms of the series is 62 813. how many terms are in the series?

    asked on January 12, 2014
  7. Math

    Diana has 520 yards of fencing to enclose a rectangular area. Find the dimensions of the rectangle that maximize the enclosed area. What is the maximum area?

    asked on December 4, 2012
  8. solid mensuration

    Determine the area of the segment of a circle if the length of the chord is 15 inches & located 5 inches from the center of the circle.

    asked on December 1, 2012
  9. Language arts

    Compare and contrast your independent reading selection with one or two other selections you have read in this unit. SUpport your response with at least 2 pieces of evidence from your Independant Reading selection. Be sure to give the title an author of

    asked on October 18, 2018
  10. History

    Which correctly defines divine right? A)the belief that people have the right to challenge religious authority B)the idea that religious leaders should guide society and the state C)the belief that all people are born with God-given rights D)the idea that

    asked on November 6, 2018
  11. math

    Money is invested in a savings account at 3.4% simple interest. After 1 year, there is $1695.76 in the account. How much was originally invested?

    asked on February 26, 2013
  12. solid mensuration

    Two perpendicular chords divide a circle with a radius of 13 cm into 4 parts. If the perpendicular distances of both chords are 5 cm each from the center of the circle, find the area of the smallest part. Please include solution. Thanks.

    asked on December 1, 2012
  13. History

    Which accurately defines heliocentric theory? concept of the solar system with the sun at the center and planets orbiting it Is this the correct answer?

    asked on November 6, 2018
  14. chemistry

    the reaction of aluminum metal (Al) with oxygen (O2) forms Al2O3. What is a balanced equation for this redox reaction. What are two half reactions to show how many electrons are gained or lost by each species?

    asked on April 11, 2010
  15. History

    Which defines caste system? A)Muslim system of separating men and women in society B)European feudal practice of granting knighthood to a warrior C)Hindu practice of determining social status by birth D) Buddhist belief of spiritual equality based on

    asked on November 6, 2018
  16. Math

    One shuttle service charges $10 for pickup and $0.10 per mile. The other shuttle service has no pickup fee but charges $0.35 per mile. Find the number of miles for which the cost of the shuttle service is the same. Please help me and show your work thanks.

    asked on February 21, 2012
  17. Chemistry

    Will someone show me the formula or help me through working this question? Thanks! A 2.85g lead weight, initially at 10.3 deg C, is submerged in 7.55g of water at 52.3 deg C in an insulated container. what is the final temperature of both substances at

    asked on April 10, 2014
  18. engineering economy

    Maintenance cost of an equipment is P20,000 for 2 years, P40,000 at the end of 4 years, and P80,000 at the end of 8 years. Compute the semi-annual amount that will be set aside for this equipment. Money worth 10% compounded annually.

    asked on January 26, 2015
  19. Engineering Economy

    Maintenance cost of an equipment is P20,000 for 2 years, P40,000 at the end of 4 years, and P80,000 at the end of 8 years. Compute the semi-annual amount that will be set aside for this equipment. Money worth 10% compounded annually. My answer is

    asked on January 27, 2015
  20. Math

    Lucy used 3 3/4cups of sugar for her lemonade stand she divided the sugar in equal amounts into 6 pitcher how much sugar went into each pitcher

    asked on November 9, 2015
  21. Chemistry

    What is the compound name for Sb2(CrO4)5? This is the only question I am having trouble with.

    asked on April 23, 2012
  22. 6th grade math

    Write the expression 6a in words Write the expression 3x+7 in words

    asked on October 31, 2018
  23. Biology*STUCK*

    The fluid mosaic model describes the structure of the plasma membrane. Embedded within the plasma membrane are proteins and carbohydrates that contribute to the term mosaic. Glycolipids and glycoproteins are examples of carbohydrates on the surface of red

    asked on November 12, 2014
  24. computer science

    write a program that prompts the user to input three numbers. The program should then output the numbers in nondescending order.

    asked on October 29, 2010
  25. physical science

    . A swimming pool is exactly 20m long, 7m wide, and 2m deep. What is its volume in cubic feet to 3 significant figures?

    asked on July 5, 2012
  26. algebra

    The slope of a vertical line is _________? The equation of the vertical line passing through (4, 5) is ________?

    asked on October 24, 2014
  27. math

    Take the following out of fraction form tan^2x/cscx+1

    asked on March 28, 2012
  28. solid mensuration

    Find the area of a cyclic quadrilateral whose 2 sides measure 4 & 5 units, & whose diagonal coincides with a diameter of the circle. Suppose the radius of the circumscribing circle is 2 sq.root of 3 units. Please include solution. Thanks.

    asked on December 1, 2012
  29. Math

    The ratio of oil to vinegar in a certain salad dressing is 8:5. How much oil must be blended with 7 liters of vinegar for that recipe?

    asked on February 18, 2015
  30. solid mensuration

    Find the area of a portion of a semicircle of radius 15 m that is outside the area of an inscribed square if the base of the square lies on the diameter of the semicircle. Please include solution. Thanks.

    asked on December 1, 2012
  31. math

    an electronics store receives a shipment of 40 graphing calculators including 3 that are defective. Four of the calculators are sleceted to be sent to a local high school. How many selections can be made using the original shipment

    asked on February 11, 2012
  32. chemistry

    How can you prepareead carbonate from lead (II)oxide and sodium carbonate

    asked on August 18, 2019
  33. History

    In which type of government is power held by the people through elected representatives? A)republic B)theocracy C)feudalism D)monarchy A?

    asked on November 6, 2018
  34. solid mensuration

    A circle has an area equal to 25 pi Its diameter AB coincides with one of the sides of triangle ACB in which the vertex C lies on the circle. If the triangle has an area equal to 11, find its perimeter. Please include solution. Thanks.

    asked on December 1, 2012
  35. Chemistry

    Draw the best Lewis structure for NCCH2C(O)CH2CHO, a neutral molecule. Show all atoms, bonds, lone pairs, and formal charges.

    asked on September 11, 2009
  36. math

    Renting a Car A rental car costs $25 plus $0.25 per mile. (a) Write an equation that gives the cost C of driving the car x miles. (b)When will the rental be $100 dollars? Complete numerically with a table of values.

    asked on December 14, 2014
  37. Physics

    Problem: A hunter shoots an arrow at a deer directly away from him. When the arrow leaves the bow, the deer is at a distance of 38 m. When the arrow strikes, the deer is at a distance of 51.00 m. The speed of the arrow is 65.00 m/s. What must have been the

    asked on February 2, 2009
  38. algebra

    A piece of pottery is removed from a kiln and allowed to cool in a controlled environment. The temperature (in degrees Fahrenheit) of the pottery after it is removed from the kiln for various times (in minutes) is shown in the following table. Time, min

    asked on October 24, 2014

    Methanol (CH4O0, which is used as a fuel in high performance racing cars, burns in the presence of )2 to form CO2 and H2O. The molar masses for all substances are given under the balanced equation. 2 Ch4O9l) + 3 O2(g)-->2 CO2(g)+ 4H2O9g) 32.0g/mol 32.g/mol

    asked on April 12, 2010
  40. chemistry

    Calculate the mass in grams of 2.50 mol iron(II) hydroxide. A. 29.5 g Fe(OH)2 B. 184.5 g Fe(OH)2 C. 225 g Fe(OH)2 D. 3.38 x 10-2 g Fe(OH)2 C

    asked on November 11, 2012
  41. Economics

    Could you please check these thanks. Directions: Supply can decrease and increase depending upon several factors. Also you must put if that factor increase/decreases amount of supply, if the supply curves to the left/right, and if the cost to produce is

    asked on May 11, 2009

    Methanol(CH4O),used in racing cars,burns O2 to form CO2and H2O. 2CH4O(l) + 3O2(g)-->2Co2(g) +4H2O(g) 32.0g/mol 32.g/mol 44.g/mol 18.g/mol What is the theoretical yield of CO2 from 48 g of methanol? What is the percent yield of CO2 if 48.0g og CO2 are

    asked on April 12, 2010
  43. Chemistry

    If the equilibrium concentrations are [PCl5] = 1.0M, [Cl2] = 0.10M, what is the equilibrium constant value? PCl5(g) PCl3(g) + Cl2(g) Would you mind showing the calculations Please. I've been working on this problem over an hour now. Not certain if I am

    asked on January 20, 2013
  44. grand canyon

    Draw a scatterplot indicating a strong negative relationship between the variables of income and mental illness. Be sure to label the axes correctly

    asked on July 20, 2012
  45. chemistry

    how many moles of solute are contained in each solution? 250 mL of a 0.55 M NaNO3 solution? 145 mL of a 4.0 M HNO3 solution? 6.5 L of a 2.5 M HCl solution?

    asked on April 11, 2010
  46. Biology

    In peas, tall plants (T) are dominant to short (t), purple (P) is dominant to white flower color (p), and round seeds (R) are dominant to wrinkled seeds (r). What is the phenotype of a plant with genotype TtppRr?

    asked on February 18, 2008
  47. Biology

    Discuss two lifestyle factors (one for bone and one for muscle) that affect the growth, development, size and/or healing (positively or negatively of the tissue. Also state whether the factor can lead to a disease or disorder of the tissue.

    asked on July 15, 2012
  48. 9th grade physics

    If a transparent material has a refractive of 2.0; a) calculate the critical angle b) if the refractive index were less than 2,0, would the critical angle be greater or less than before? Im super confused at this :(

    asked on March 3, 2012
  49. Early Childhood

    Describe nine elements of daily structure recommended for any early childhood program.

    asked on December 3, 2012
  50. trigonometry

    a flagpole 25 feet high stands on the top of a tower, which is 105 feet high. at what distance from the base of the tower will the flagpole subtend an angle of 3 degrees, 20 minutes?

    asked on October 11, 2012
  51. Geography - URGENT!

    It has been said that Eastern Europe is a political region more than a physical region. Would you agree or disagree with this statement? You must provide a solid argument for your position. My answer: Eastern Europe has only been a political region since

    asked on July 6, 2012
  52. English

    In the first paragraph, underline all common nouns once and proper nouns twice. In the second paragraph, underline two pronouns. In the third paragraph, underline one action verb once, underline a helping verb twice, and circle a linking verb. In the

    asked on October 1, 2010
  53. Mathy

    In printing an article of 48,000 words, a printer decides to use two sizes of type. Using the larger type, a printed page contains 1,800 words. Using a smaller type, a page contains 2,400 words. The article is allotted 21 full pages in a magazine. How many

    asked on August 6, 2010
  54. Geometry

    How many different surface areas are possible when 8 one inch cubes are arranged so that each has one or more faces in common (touching) with at least one of the other cubes? We have to use a physical model. And I have no idea how to start this or even do

    asked on January 24, 2015
  55. Writing

    What if ten years ago, you started working as a clerk for DMD Medical Supplies? Six months ago, Liz Jakowski,the human resources director, promoted you to office manage. You manage two employees: Jack Snyder and Ruth Disselkoen. My office provides

    asked on December 14, 2011
  56. Science

    The percent of atmosphere above and below 16.8 km is?

    asked on February 23, 2009
  57. Finance

    Assume personal income was $28 million last year. Personal outlays were $20 million and personal current taxes were $5 million. a. What was the amount of disposable personal income last year? Disposable personal income (DPI) = personal income – personal

    asked on January 28, 2015
  58. Math

    Suppose two lines intersect in a plane. A. What do you know about the two pairs of vertical angles formed? B. What do you know about the pairs of adjacent angles formed?

    asked on February 19, 2014
  59. Special Education Setting

    when working with behavior disordered children in the classroom,the teacher aide can modify behaviorby A)praising them when they succeed. B)using the same teaching techniques for every student C)underestimating what the child can do. D)reinforcing the

    asked on October 3, 2013

    What do I capitalize? Which is correct in this sentence: California Gold Rush or California gold rush? Please support with the grammatical rule. The decline of whaling in America began with the California gold rush in 1849.

    asked on September 25, 2007
  61. math

    a boy travels 15 km due north,then goes 9 km due east,then 3km due far is he from his starting point find the distance the boat would have traveled if it had gone directly from point p to point t

    asked on February 20, 2013
  62. Ninth Grade English

    Romeo and Juliet; Act 1 Scene 5 Chorus Now old desire doth in his death-bed lie, and young affection gapes to be his heir; That fair for which love groan'd for and would die, With tender Juliet match'd is now not fair. Now romeo is belov'd, and loves

    asked on November 19, 2011
  63. accounting

    Jan Nab is the sole owner of Deer Park, a public camping ground near the Lake Mead National Recreation Area. Jan has compiled the following financial information as of December 31, 2010. Revenues during 2010—camping fees $140,000 Market value of

    asked on April 9, 2013
  64. math

    a boat starts at point a p travels 15 miles due north to point r then turns due east and travels 8 more miles to the dock at point t find the distance the boat would have traveled if it had gone directly from point p to point t

    asked on February 20, 2013
  65. solid mensuration

    Find the area of a segment of a circle whose diameter is 16 cm & the central angle measures 80 degrees. Please include solution. Thanks.

    asked on December 1, 2012
  66. trig

    In a regular octagon, AB is a diagonal and CD joins the midpoints of two opposite sides. The side length of the octagon is 4 cm. To the nearest tenth of a cm. find a)AB and b)CD. I'm stumped.

    asked on January 15, 2009
  67. Psychology

    Treena is a personable student in Mr. Jordan’s math class. Mr. Jordan can see that Treena is popular with her peers. He regularly sees her conversing animatedly with her friends in the cafeteria and before and after school. She does well in class also.

    asked on January 27, 2015
  68. economics

    Consider the following production possibilities table: Option Y X A 0 100 B 80 80 C 120 50 D 140 10 a)Provide a measure of the approximate marginal opportunity cost of an additional unit of X for each interval. Is the law of increasing cost satisfied?

    asked on October 23, 2013
  69. PHL458

    Don't really understand what the teacher want. Can you help me get a better understanding. Evaluating and Refining Resolutions Presentation (Preparation) Search for societal issues and pick one issue you would like to resolve. Obtain faculty approval of

    asked on May 31, 2013
  70. Chemistry

    A buffer is prepared by mixng 150.0 mL of 0.500 M ammonia, 250.0 mL of 0.200 M ammonium chloride and 600.0 mL of water. To this solution is added 50.0 mL of 0400 M hydrochloric acid. What is the final pH?

    asked on December 9, 2009
  71. physics

    a stone of mass o.5 kg is dropped from a height of 5om.what is the kinetic energy of the stone just before it strikes the ground

    asked on November 16, 2009
  72. marketing

    Explain the relationship between the 3 elements that constitute the marketing concept.

    asked on July 5, 2009
  73. Math

    Use the points(0,6200) &(25,10500) to write an equation for the number of housing units needed. Then use the points(0,6500) and (25,6100) to write an equation for the number of affordable units available.

    asked on November 27, 2007
  74. math

    Name the least number that, when rounded to the nearest hundred is 700

    asked on October 1, 2015
  75. Math- Data Management

    How would you solve this problem. The mean of 10 numbers is 8. If an 11th number is now included, the mean becomes 9. What is the value of the 11th number? Make an algebraic solution.

    asked on March 2, 2015
  76. Geometry

    The surface of a cube is painted red and blue, 3 sides of each. The cube is cut into 27 equal sized smaller cubes. Find both answers to the question, "How many cubes have at least 2 sides painted blue?" and "How many cubes have at least 1 side painted

    asked on January 24, 2015
  77. Sociology/Social Responsibility

    I have to write two paragraphs on Gays in the Military. The Don't Ask Don't Tell" campaign. What mediums, messages and techniques did this campaign use to make it so effective. i CAN FIND A LOT OF INFO ON THE GAYS IN THE MILITARY, BUT NOTHING THAT HELPS

    asked on November 10, 2014
  78. Math

    Ok so I need to write a equation for this jasmine paid $25 for 2 binders and 1 pack of pens. The pens cost $5. What equation could I write to find out the price per binder? Could it be 25-5=x

    asked on September 14, 2014
  79. chemistry

    A buffer solution was prepared by mixing 442 mL of 0.181 M NaOCl and 139 mL of 0.421 M HOCl. Calculate the pH of the solution given that Ka (HOCl) is 3.2 x 10-8.

    asked on March 18, 2012
  80. Chemistry

    For the reaction ,2 O3 —> 3 O2,the reaction rate , delta[O2]/delta t , = 3.0M/min. What is the reaction rate, delta[O3]/delta t, for the same time period? A) 3.0 M/min B) –3.0M/min C) 2.0 M/min D) –2.0M/min E) .67M/min

    asked on January 15, 2011

    how many grams are contained in 0.50 mol of each compound? HCl Na2SO4 C2H2 and Al(OH)3?

    asked on April 12, 2010
  82. physics

    Rearrange the kinetic energy equation to solve for: m And v

    asked on November 11, 2014
  83. algebra

    The rate at which water evaporates from a certain reservoir depends on the air temperature. The table below shows the number of acre-feet (af) of water per day that evaporate from the reservoir for various temperatures in degrees Fahrenheit. Temperature,

    asked on October 24, 2014
  84. Special Education Setting Teachers Aide

    children with a language or speech disorde are A)sometimes suffering from an aphasia.(my answer) B)always learing challenged. C)able to receive special help only after the third grade. D)unable to use communication boards. can someone please check if this

    asked on September 26, 2013
  85. american history

    Which of the following was the primary interest of the British goverment in approving James Oglethorpe's Georgia colony? A. developing new lands for rice production B.Thwarting spanish claims in the area south of carolina C. Providing an asylum for British

    asked on June 26, 2013
  86. chemistry

    Find the mass in grams of 1.01 mol TiO2 A. 0.806 g TiO2 B. 80.67 g TiO2 C. 8.06 g TiO2 D. 806.7 g TiO2 B

    asked on November 11, 2012
  87. Science

    The warmest temperature occurs at _______ and why does the warmest daily temperature occur in mid-to-late afternoon rather than at the time if the highest sun angle? The coolest temperature of the day occurs at sunrise. Why?

    asked on February 23, 2009
  88. Physics

    Problem: A Super Ball is thrown to the ground with an initial downward velocity of 0.70 m/s and pops back up to the hand of the thrower; the total time elapsed is 0.71 s. What height was the Super Ball thrown from? Do I use the formula x = x0 +

    asked on February 1, 2009
  89. history

    how were religion,art and government linked to ancient egypt?

    asked on September 21, 2008
  90. Biology*STUCK*

    The fluid mosaic model describes the structure of the plasma membrane. Embedded within the plasma membrane are proteins and carbohydrates that contribute to the term mosaic. Glycolipids and glycoproteins are examples of carbohydrates on the surface of red

    asked on November 12, 2014
  91. college algebra

    There were 39,000 desktop publishing jobs in the United States in 2000. It has been projected that there will be 64,000 desktop publishing jobs in 2010. (a) Using the BLS data, find the number of desktop publishing jobs as a linear function of the year.

    asked on October 24, 2014
  92. english

    The following sentence is missing punctuation: “The crowd upset by the delay began to chant loudly for the band to appear.” Explain where the error has occurred in this sentence and how it can be fixed. 6. Identify which one of the following sentences

    asked on October 5, 2012
  93. MATH


    asked on October 2, 2011
  94. physics

    a stone of mass o.5 kg is dropped from a height of 5om.what is the kinetic energy of the stone just before it strikes the ground?

    asked on November 16, 2009
  95. Math

    Envision that you have served as business manager of Media World for over 2 years. You have noticed that for the last 12 months the business has regularly had cash assets of $20,000 or more at the end of each month. You have found a 6-month certificate of

    asked on October 19, 2009
  96. math

    How would you solve this problem?? A piggy bank contains only nickels and dimes. In all there are 42 coins with a total value of $3.85. How many nickels are in the piggy bank??

    asked on October 13, 2009
  97. Math

    solve 3(2x-2)=18 select the correct choice below& if necessary fill in the answer box to complete your choice. a. the solution is x= simplify answer. b. the solution is all real numbers. c. there is no solution.

    asked on September 26, 2009
  98. Science Environmental

    Using the 4 principles of sustainability Reliance on Solar Energy, Nutrient recycling, Biodiversity, and Population control. How would you classigy the following? • Recycling soda cans • Using a rake instead of a leaf blower • Choosing to have no

    asked on July 10, 2008
  99. Chemistry

    What mass of carbon dioxide is produced when 7.5g of methane is completely burnt in air.

    asked on December 3, 2016
  100. Math

    If a family plans to have four kids what is the probability that they will have at least one girl

    asked on July 14, 2016


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