Most popular questions and responses by betsy
  1. arithmetic

    i need help solving this problem: 2.75+.003+.158?

    asked on December 18, 2009
  2. math

    Kyle wants to form rectangles using straws.he has two straws of 6 inches long, two straws 4 inches long, and two straws 2 inches long.using four straws attached at the ends, how many different rectangles can Kyle form¿ what are the perimeters of the

    asked on November 5, 2015
  3. Math

    Tricia read 1/4 of her book on Monday. On Tuesday, she read 36% of the book. On Wednesday, she read 0.27 of the book. She finished the book on Thursday. What percent of the book did she read on Thursday?

    asked on February 19, 2013
  4. math

    Suppose the scores of students on an exam are normally distributed with a mean of 393 and a standard deviation of 57. According to the empirical rule, what percentage of students scored between 279 and 507 on the exam

    asked on October 3, 2016
  5. Physics

    a child causes a wagon to accelerate by pulling it with a horizontal force. newton's third law says that the wagon exerts an equal and opposite force on the child. how can the wagon accelerate

    asked on November 22, 2008
  6. AP Chemistry

    How many grams of benzoic acid, a monoprotic acid with a Ka=6.4x10 to the negative 5, must be dissolved in 500.0 mL of water to produce a solution with a pH=2.50?

    asked on March 3, 2008
  7. math 140

    There were 610 people at a play. The admission price was $3.00 for adults and $1.00 for children. The admission receipts were $1,250.00. How many adults and children attended?

    asked on March 18, 2013

    2 HgCl2 (aq) + SnCl2 (aq) --> SnCl4 (aq) + Hg2Cl2 (s) Hg2Cl2 (aq) + SnCl2 (aq) --> 2Hg (s) + SnCl4 (aq) For each reaction, write the two half-reactions that make it up and calculate the overall reaction potential by adding the two half-reactions. Each

    asked on April 8, 2012
  9. Math

    A phone call costs $0.58 for the first 3 minutes and $0.15 for each additional minute. If the total charge for the call was $4.78, how many minutes was the call?

    asked on October 30, 2012
  10. math

    A plane flies the first half of a 5600 km flight into the wind in 3.5 hours. The return trip, with the same wind, takes 2.5 hours. Find the speed of the wind and the speed of the plane in still air.

    asked on December 6, 2011
  11. Math

    The first social studies test had 16 questions. The second test had 220% as many questions as the first test. Find the number of questions on the second test.

    asked on February 19, 2013
  12. statistics

    A study of peach trees found that the average number of peaches per tree was 625. The standard deviation of the population is 140 peaches per tree. Ascientist wishes to find 80% confidence interval for the mean number of peaches per tree. How many trees

    asked on June 18, 2013
  13. chemistry

    A 2.000 g sample of magnesium was burned in air to form an oxide. After the product was purified it was found to have a mass of 3.317 g. What is the empirical formula for the product?

    asked on October 14, 2009
  14. early childhood

    To promote infant (six to twelve months) speech growth, name five useful adult techniques.

    asked on April 4, 2013
  15. Math

    A 40ft tall monument casts a shadow that just reaches the base of a 4ft tall parking meter. If the parking meter's shadow is 6.5ft long, how far apart are the monument and the meter?

    asked on February 20, 2013
  16. Math

    Ellory budgets at most $20 each week for lunch. She has spent $17.75 so far this week. Write and solve an iequality to determine how much more Ellory can spend and stay within her lunch budget.

    asked on December 5, 2012
  17. math 140

    If 5 is added to a number the sum is tripled, the result is 31 more than the number. Find the number.

    asked on April 4, 2013
  18. Math

    Stanely is 6ft tall. He wants to stand in the shade of a tree that is 35ft tall. If the tree casts a 10ft shadow, what is the farthest Stanely can stand from the tree and be completely in its shadow? Round your answer to nearest tenth of a roof?

    asked on February 20, 2013
  19. Algebra

    If someone invests $8000 at 7%, how much additional money must he invest at 4% so that his total annual income may equal 5% of his entire investment?

    asked on January 2, 2013
  20. business law

    Hello - i need help to understand a study case. can 3 partners of a limited company ge rid of the fourth by just voting him out please? thanks a lot!

    asked on October 20, 2009
  21. Math

    The pressure on a scuba diver at sea level is 14.7 pounds per sq inch (psi). The pressure increases 0.445 psi for each foot of depth. Suppose the pressure on a diver is 41.4 psi. How deep is she? A spring is 2 in long with no weight suspended from it. For

    asked on September 11, 2013
  22. early childhood

    Name four child characteristics that might make a preschool child hard to identify as talented or gifted.

    asked on April 4, 2013
  23. Math

    1)A bakery can sell muffins for $1 each. If it costs the bakery $5 to make 20 muffins, what percent of the money made from muffins sales is profit? 2) A community is considering increasing the sales tax rate 0.5% to fund a new sports arena. If the tax rate

    asked on February 26, 2013
  24. math

    A community is considering increasing the sales tax rate 0.5% to fund a new sports arena. If the tax rate is raised, how much more will you pay in sales tax on $500?

    asked on February 26, 2013
  25. Math

    An airplane traveled from Boston to Las Vegas making a stop in St. Louis. The plane traveled 2410 miles altogether, which is 230% of the distance from Boston to St. Louis. Find the distance from Boston to St. Louis to the nearest mile.

    asked on February 19, 2013
  26. chemistry

    If Pdcb replaces naphthalene as an active ingredient in mothballs , what is the value of kf for camphor if a 0.260 m solution of PDCB in camphor decreases the freezing point of camphor by 9.8 degrees C. I am sure that you will use the formula ^T=-kfm.

    asked on January 26, 2009
  27. math

    Anna and Tim saw two movies in one day. The two movies lasted 4 hours. One movie was half an hour longer than the other. How many hours did the shorter movie run?

    asked on September 10, 2013
  28. math

    Wyatt and Allyson were asked to solve a percent problem using the numbers 13 and 38. Wyatt found 13% of 38 and Allyson found 38% of 13. Explain why they both got the same answer. Would this work for other numbers as well? Why or why not?

    asked on February 12, 2013
  29. algebra

    Katie says that if the coefficients of each variable are identical, then she does not need to solve the system since it will always have infinite solutions. Is she correct?

    asked on February 8, 2013
  30. Math

    find the second derivative of ln(sinx) i worked this out and i got -tanx

    asked on November 18, 2008
  31. math 140

    A football team gained 12 yards on one play, lost 40 yards on another, and gained 34 yards on the last play of the first half. They had already gained 345 already during the half. What was the total yardage gain for the first half?

    asked on March 18, 2013
  32. math 140

    The math scores of a math test for five students were posted on the bulletin board. The students' names are Rod, Penny ,Jake, and Fred. Rod and Fred scored the same number of points. Penny did not get the highest score. John's score was 5 points lower than

    asked on March 18, 2013
  33. physics

    A toy car rolls at a constant speed down a straight inclined track. When the car reaches the flat surface at the base of the inclined track, the speed of the car decreases.

    asked on August 10, 2011
  34. 7th grade


    asked on May 8, 2009
  35. early chlhood

    Ms. Sue you do not know me and I do not know you. I am not a cheater because I have a lot going on in my life. My husband has stage four cancer and I am trying to finish school and also take care of my two small children. I watching my husband die in front

    asked on April 5, 2013
  36. early childhood

    What problems might non-English speaking preschoolers encounter in their attempts to play with others?

    asked on April 4, 2013
  37. early chilhood

    If an early childhood teacher were to learn a second language along with learning Standard English, what language should it be?

    asked on April 4, 2013
  38. early childhood

    Name four elements of successful English-language leaner programs for preschoolers.

    asked on April 4, 2013
  39. math 140

    Use differences to find a pattern in the sequence. 1,1,11,36,81,151,251 Assuming the pattern continues, the eight term should be.

    asked on April 4, 2013
  40. math140

    If 5 sweaters cost $66.35 how much would 8 sweaters cost?

    asked on April 4, 2013
  41. math 140

    I have two questions posted that has not been answered please help. The questions were posted on March 18 please help.

    asked on March 19, 2013
  42. 140

    Tom and Andy find a long drainage pipe in a vacant lot. It is big enough so that each boy can just manage to squeeze into it and crawl from one end to the other. If Tom and Andy go into the pipe from opposite ens, is it possible for each boy to crawl the

    asked on March 18, 2013
  43. Math

    What is the principle and the interest? A=$2719.50 P= ? r=6.1% t=20 years What is the interest rate? Balance= $3742.50 p=$3000 interest rate= ? t=45 months

    asked on March 5, 2013
  44. Math

    3x/4 - 2x/3 = 2/5

    asked on November 18, 2012
  45. Math

    Heather worked for 15 3/4. She was paid a total of 102 3/8 dollars. What is Heather hourly wage?

    asked on October 17, 2012
  46. Pre-Calc

    cot 19.8 degrees

    asked on July 30, 2011
  47. AP Physics

    A marble is dropped from a height of 10 m. A 2nd marble is rolled off a 10 m table at 5 m/s. A 3rd marble is fired at 5 m/s at an angle of 45 degrees off the table. Which one is going 15 m/s when it hits the ground?

    asked on October 21, 2010
  48. science

    What happens to a vesicle in exocytosis?

    asked on October 8, 2008
  49. science

    What are vesicles?

    asked on October 8, 2008
  50. science

    How are glucose molecules moved into a cell?

    asked on October 8, 2008
  51. Science

    How does osmosis explain the fact that a watery syrup forms when you put sugar on strawberries?

    asked on October 8, 2008
  52. Business Communications

    Can a request for information be classified as an information or positive message

    asked on September 28, 2008
  53. math

    25/5 -4 * 2/9

    asked on September 5, 2013
  54. early childhood

    By six to twelve months of age an infant is a specialist in his own native language. Explain.

    asked on April 4, 2013
  55. math 140


    asked on April 4, 2013
  56. math 140


    asked on April 4, 2013
  57. Math

    3k/4 - 28 - 2k/3 = 37

    asked on November 18, 2012
  58. Math

    Grace ddrove 159 miles and used 5 3/10 gallons of gas. How far could she go with one gallon of gas?

    asked on October 17, 2012
  59. Algebra 1

    f(x)=xcubed - 2xsquared + 4x-7, what is f(0)

    asked on May 16, 2011
  60. trig

    True or false? If A and B are angles of a triangle such that A > B, then cos A > cos B.

    asked on January 20, 2011
  61. AP Physics

    An object has a mass of 80 kg on earth. the acceleration of gravity on Mars is about 1/4 of the acceleration of gravity on Earth. What is the weight of the object on Mars?

    asked on October 24, 2010
  62. Math

    Explain how numbers can be used to name something.

    asked on September 13, 2010
  63. Geometry

    How can I prove a line is an altitude

    asked on November 18, 2008
  64. ecology

    What is a cloroplast

    asked on October 2, 2008
  1. Hamilton

    Jule studied the amount of your mom ,you freaking loser.You have nothing to do.

    posted on February 5, 2018
  2. Math


    posted on January 28, 2018
  3. Math

    To make the lemonade stronger you need to increase the number of lemons and either decrease the amount of water or leave the amount of water the same. The only ratio that does that is 8 to 4

    posted on January 23, 2018
  4. math

    i think yes because 350-206 equals 140

    posted on November 5, 2015
  5. math

    so each box has just 1 level of cans since height = 1ft 3ft x 2ft = 36in x 24 in so whe have 36/6 = 6 cans in one dimension and 24/6 = 4 cans in the other dimension we have 6x4 = 24 cans per box ==> answer 1 --------------- volume of the box = 36x24x12 =

    posted on April 14, 2015
  6. Math


    posted on April 4, 2013
  7. Math

    8hr/1day * 7days/1week. Cross Cancel (day with days) You now remain with hrs per week After you remain with 8hr * 7 Which equals 56hrs in One Week Remember You Are Using Dimensional Analysis

    posted on February 12, 2013
  8. math


    posted on December 6, 2011
  9. chemistry

    This is how I tried to answer... 1 mol of Mg= 24.3g 1 mol of O= 16.0 g 2.0 g Mg = 0.0823 mol Mag 1.317 g O (3.317-2.0) = 0.0823 mol O empirical formula is MgO

    posted on October 14, 2009
  10. unscrambling word

    letters are R O CC EE from the Friday night Scramble in the newspaper-no one cn get it! HELP!

    posted on February 14, 2009
  11. Math

    is it just tanx?

    posted on November 18, 2008
  12. 7th grade

    thank you

    posted on October 8, 2008
  13. AP Chemistry

    Ok, so I'm at 1.56x10^-1 M, would I divide that by .5 L right away?

    posted on March 3, 2008