Popular questions and responses by Olivia
  1. Calculus 1

    A fence is to be built to enclose a rectangular area of 220 square feet. The fence along three sides is to be made of material that costs 6 dollars per foot, and the material for the fourth side costs 13 dollars per foot. Find the dimensions of the

    asked on October 31, 2011
  2. Chemistry

    3) The following set of data was obtained by the method of initial rates for the reaction: 2 HgCl2(aq) + C2O42-(aq) 􀀏 2 Cl-(aq) + 2 CO2(g) + Hg2Cl2(s) What is the rate law for the reaction? [HgCl2], M [C2O42-], M Rate, M/s 0.10 0.10 1.3 × 10-7 0.10

    asked on October 27, 2010
  3. Chemistry

    For the reaction 4FeCl2(aq) + 3O2(g) → 2Fe2O3(s) + 4Cl2(g), what volume of a 0.650 M solution of FeCl2 is required to react completely with 8.58 × 1021 molecules of O2?

    asked on February 23, 2015
  4. precal- PLEASE HELP!

    secx/secx-tanx=sec^2x+ secx+tanx

    asked on March 25, 2012
  5. AP Chemistry

    Consider the following reaction. CaSO4(s) Ca2+(aq) + SO42-(aq) At 25°C the equilibrium constant is Kc = 2.4 10-5 for this reaction. (a) If excess CaSO4(s) is mixed with water at 25°C to produce a saturated solution of CaSO4, what are the equilibrium

    asked on October 20, 2012
  6. Chemistry

    A 1.42-g sample of a pure compound, with formula M2SO4, was dissolved in water and treated with an excess of aqueous calcium chloride, resulting in the precipitation of all the sulphate ions as calcium sulphate. The precipitate was collected, dried, and

    asked on December 13, 2011
  7. chemisty

    does NF3 follow the octet rule

    asked on November 28, 2010

    If the time at town A(LONGITUDE 75"W)is 5pm on friday.What will be the time and day at town B(LONGITUDE 120"E)

    asked on February 26, 2017
  9. Government

    The President can choose to get rid of democracy. True or False?

    asked on June 25, 2013
  10. Math

    Suzanne has a liter of apple juice. How many cups with a capacity of 100 mL can she fill with apple juice?

    asked on March 25, 2013
  11. Social Studies

    what 5th grade social studies word starts with Y,Z,and N?

    asked on December 18, 2012
  12. Maths

    If it takes 6 men 4h to dig a hole 6m deep,how long will it take 10 men to dig a hole 5m deep?

    asked on October 16, 2014
  13. Geometry

    (SAT Prep) The perimeter of pentagon ABCDE is 30 in, AB = 7 in, BC = CD = 6 in, DE = 5 in. How many sides of the pentagon have equal length?

    asked on February 14, 2017
  14. Pre-algebra

    If ΔCAT≅ΔDOG, which statement must be true? A. m∠A=m∠O B. m∠C=m∠G C.CA = OG --- ---- D.CT≅DO

    asked on August 19, 2019
  15. Chemistry

    A solution is prepared by mixing 45.00 mL of 0.022 M AgNO3 with 13.00 mL of 0.0014 M Na2CO3. Assume volumes are additive. Calculate [Ag+], [CO32-], [Na+] and [NO3-] after equilibrium is established.

    asked on November 15, 2013
  16. Math- Calculus

    Locate the absolute extrema of the function on the closed interval: y= 4/x+tan(pix/8), [1,2]

    asked on November 8, 2012


    asked on August 2, 2012
  18. math

    Find the length of the diameter of a circle whose endpoints are at (11, 4) and (10, 5).

    asked on June 26, 2012
  19. Math

    What is the place value of the number? 14.(5)805 ^

    asked on October 27, 2010
  20. geometry

    ray bd bisects angle abc. what are the measures of angles; abd, cbd, and abc? the equations are 3x+6 and 7x-18.

    asked on September 5, 2019
  21. Math

    Which set of best describes the numbers used on a scale for a standard thermometer? A.whole numbers B.rational numbers C.real numbers D.integers I choose Real Numbers if I am incorrect can you explain why.

    asked on May 10, 2015
  22. Physics

    A block of mass m = 4.30 kg slides along a horizontal table with speed v0 = 8.50 m/s. At x = 0 it hits a spring with spring constant k = 31.00 N/m and it also begins to experience a friction force. The coefficient of friction is given by μ = 0.150. How

    asked on October 5, 2014
  23. 6TH GRADE

    Describe a real-world situation that is modeled by multiplying two fractions or mixed numbers. Can someone give me an example?

    asked on September 24, 2014
  24. Physics

    A lead ball, with an initial temperature of 25.0oC, is released from a height of 119.0 m. It does not bounce when it hits a hard surface. Assume all the energy of the fall goes into heating the lead. Find the temperature (in degrees C) of the ball after it

    asked on December 15, 2011
  25. Calculus 1 Newton's Method

    Using Newton's method, approximate the root of the equation x^3+x+2=0 with the initial guess x1=-1 gives: x2=? and x3=? answers are not 0 or -1

    asked on October 31, 2011
  26. statistics

    A city survey found that 47% of teenagers have a part time job. The same survey found that 78% plan to attend college. If a teenager is chosen at random, what is the probability that the teenager has a part time job and plans to attend college?

    asked on October 11, 2011
  27. Math, Stats

    the probability is 0.6 that a person shopping at a certian store will spend less than $20. For group of size 19, find the mean number who spend less then $20.

    asked on February 21, 2011
  28. History

    What is the role of a lieutenant governor? A. To check and balance the actions of the governor B. To maintain order and decorum on the Senate floor C. To cast the tie-breaking vote in the state legislature D. To take over the governor's duties if the

    asked on October 28, 2019
  29. Calculus

    If the instantaneous rate of change of f(x) at (2,-4) is 5, write the equation of the line tangent to the graph of f(x) at x=2.

    asked on July 17, 2017
  30. Maths

    If 2 numbers have a difference of 2.38, one number is 3 times bigger than the other number and the two numbers both add up to 6, what could the two numbers be?

    asked on February 1, 2017
  31. Math 12

    A car is purchased for $30,000. It depreciates at a rate of 18% per year. What equation would represent the value, y, of the car after x number of years? Use this equation to find the value of the car after five years.

    asked on January 10, 2017
  32. Physics

    A wooden block of mass 9 kg is at rest on an inclined plane sloped at an angle theta from the horizontal. The block is located 5 m from the bottom of the plane. A) Find the frictional force for theta = 20 B)If the angle is increased slowly the block starts

    asked on September 28, 2016
  33. Geometry

    A ship is 750 meters from a light house which is 50 meters tall. What is the angle of depression from the top of the lighthouse to the ship?

    asked on January 13, 2016
  34. Math HELP!

    Consider the function y = 3x5 – 25x3 + 60x + 1. Use the first or second derivative test to test the critical points. How many relative maxima did you find? 0 1 2

    asked on December 15, 2014
  35. Math

    You want to create an open rectangular box from a rectangular piece of cardboard. The cardboard has length 14 in and you want to cut 2 in squares from each corner. Draw a diagram. What is the length of the box?

    asked on August 24, 2014
  36. math

    John had $24.He spent 2/3 of his money.How much he has left.

    asked on January 30, 2014
  37. physics

    The position of a particle moving along the x axis is given by x=3.0t^2 - 1.0t^3 , where x is in meters and t in seconds. What is the position of the particle when it achieves its maximum speed in the positive x direction

    asked on November 14, 2013
  38. math

    A basketball has a diameter of 29.5 inches. If the basketball is fully inflated, about how many cubic inches of air will it hold?

    asked on March 25, 2013
  39. physics

    A person wants to push a lamp (mass 7.2 kg) across the floor, for which the coefficient of friction is 0.23. Calculate the maximum height above the floor at which the person can push the lamp so that it slides rather than tips (Fig. 9-62).

    asked on October 21, 2012
  40. precal


    asked on March 25, 2012
  41. physics

    The ionisation potential of atomic hydrogen is 13.6 eV. A strong emission line in the spectrum of atomic hydrogen occurs at a wavelength of 121.6 nm. Deduce the initial and final values of the quantum number n for this spectral line.

    asked on May 17, 2011
  42. math

    what is the expanded form of 0.6045

    asked on September 20, 2009
  43. Algebra

    What is the sum of the geometric series 20 + 21 + 22 + 23 + 24 + … + 29?

    asked on May 22, 2020
  44. Algebra

    A newspaper company is selecting four houses to receive a free newspaper. There are 10 houses on your block that are numbered 1-10. What is the probability that the four houses selected will all be even numbered houses? *

    asked on April 20, 2020
  45. Calculus

    Let f be defined as follows, where a ≠ 0, f(x) = { (x^2-2ax+a^2)/x-a if x ≠ a, 5 if x = a Which of the following are true about f? I. lim(fx) exists x --> a II. f(a) exists III. f(x) is continuous at x = a Thank you in advance!

    asked on October 10, 2019
  46. Science

    Each water molecule is made up of two hydrogen atoms and one _______ atom.

    asked on August 15, 2019
  47. Vectors

    Find the value of k so that the lines (x - 3)/(3k + 1) = (y + 6)/2 = (z + 3)/2k and quantity (x + 7)/3 = (y + 8)/-2k = (z + 9)/-3 are perpendicular.

    asked on July 24, 2019
  48. Economics

    Kelly’s utility function is given by U = 5X + 2Y, where MUX = 5 and MUY = 2 I know MRSxy would be 2.5 What is MRSXY when X = 1 and Y = 5? When X = 2 and Y = 2.5? Also how would I draw a sample indifference curve?

    asked on October 25, 2017
  49. Maths

    4y-3x=25 is the tangent to the circle x^2+y^2=25 at the point P(-3,4). The equation of the radius of the circle that passes through P is... Working out is appreciated. Thanks a lot

    asked on December 23, 2016
  50. ela

    1. Which of the following is not part of the rising action in "Raymond's Run"? (1 point) A. Squeaky and Raymond confront Mary Louise and her friends on Broadway. *** B. Mr. Pearson hints to Squeaky that she should consider letting the new girl win. C.

    asked on September 16, 2016
  51. Math

    The least common multiple of two numbers is 60, and one of the numbers is 7 less than the other number. What are the numbers? Justify your answer.

    asked on August 26, 2016
  52. Chemistry

    A reaction between gaseous sulfur dioxide and oxygen gas to produce gaseous sulfur trioxide takes place at 600◦C. At that temperature, the concentration of SO2 is found to be 1.14 mol/L, the concentration of O2 is 1.39 mol/L, and the concentration of SO3

    asked on April 23, 2016
  53. Calculus (math)

    A boat leaves a dock at 2:00 P.M. and travels due south at a speed of 15 km/h. Another boat has been heading due east at 20 km/h and reaches the same dock at 3:00 P.M. How many minutes past 2:00 P.M. were the boats closest together?

    asked on November 8, 2014
  54. Statistics

    Suppose an urn contains 10 balls numbered from 1 to 10. Someone draws 3 balls simultaneously from the urn (i.e. without replacement.) What is the probability that the lowest number drawn is 2? (8C3)/(10C3) but I know that is wrong. I also tried

    asked on September 30, 2014
  55. Chemistry

    In aqueous solution, hydrochloric acid, HCl, and sodium carbonate, Na2CO3 react to produce gaseous carbon dioxide, CO2, water, H2O and sodium chloride, NaCl. A 10.0 g impure sample of Na2CO3 is dissolved completely in water; then treated with 3.00 mol

    asked on June 15, 2014
  56. Physics

    A 30m high cylindrical water tank has a diameter of 14m. The tank is two-thirds full of water. What is the pressure at the bottom of the tank?

    asked on February 19, 2014
  57. Chemistry

    How many grams of oxygen are collected in a reaction where 247 mL of oxygen gas is collected over water at a temperature of 25°C and a total pressure of 697 torr? And would i just convert 697 torr into atm and use that for pressure? And how do i find the

    asked on February 18, 2013
  58. Chemistry

    It takes 200. seconds for a sample of carbon dioxide to effuse through a porous plug and 280. seconds for the same volume of an unknown gas to effuse under the same conditions. What is the molar mass of the unknown gas? Enter your answer to 3 significant

    asked on February 18, 2013
  59. Physics

    A total of 100000 kg of water per second flows over a waterfall 30 m high. If half of the power this flow represents could be converted into electricity, how many 100 watt lightbulbs could be supplied?

    asked on February 2, 2013
  60. Math

    For y= (3x)/(2e^x+e^-1), use graphing techniques to find the approximate intervals on which the function is: a) increasing b) decreasing c) concave up, d) concave down then find any e) local extrema f) inflection points

    asked on November 25, 2012
  61. art

    The Visual Elements: "Street, Dresden", 1907, oil on canvas by Ernst Ludwig Kirchner Describe the shapes in this painting. Are the shapes organic or geometric? Which ones? Describe how the shapes interact, or "touch" each other. Are the edges of the shapes

    asked on September 14, 2012
  62. Earlychildhood

    Frequent intense stress in children over long periods of time can?

    asked on August 17, 2012
  63. precal- PLEASE HELP!

    Given:cosA= 4/5 0(less than or equal to)A(less than of equal to)90* find sinA, sin2A, cos2A

    asked on March 28, 2012
  64. precal

    1/tanx-secx+ 1/tanx+secx=-2tanx so this is what I did: =tanx+secx+tanx-secx =(sinx/cosx)+ (1/cosx)+(sinx/cosx)-(1/cosx) =sinx/cosx+ sinx /cosx= -2tanxI but I know this can't be correct because what I did doesn't end as a negatvie:( please help

    asked on March 25, 2012
  65. grammar

    If I put a sentence here listing the dependent and independent clauses within the sentence can you tell me if I am correct. Here is the sentence. I have read several fairy tale collectionthat include th Cinderella story, but my favorite is a book that

    asked on March 1, 2012
  66. Chemistry

    1 liter of a 1 M lithium hydroxide solution is added to 1 liter of a 1 M barium chloride solution, and a precipitate forms. What ions are left in solution after the reaction is complete?

    asked on November 13, 2011
  67. Physics

    The established value for the speed of light in a vacuum is 299 792 458 m/s. What is the order-of-magnitude of this number?

    asked on March 8, 2011
  68. math

    How do you make this decimal 0.85 in simmpleiest form? And what will be the new number?

    asked on February 24, 2011
  69. Math, Stats

    the probability is 0.6 that a person shopping at a certian store will spend less than $20. For group of size 19, find the mean number who spend less then $20.

    asked on February 21, 2011
  70. algebra

    On three consecutive passes a football team gains 9 yards, loses 10, and gains 16 yards, what number represents the total net yardage?

    asked on January 9, 2011
  71. Math

    I need help on adding up fractions that denomonators arent the same HELP

    asked on October 12, 2010

    What postwar problems existed between the US and Spain? What attempts wher made to solve the problems and why did these attempts fail?

    asked on August 30, 2010
  73. chemistry

    6. Determine Keq for the reaction: 2 SO2 (g) + O2(g) 2 SO3(g), given that 1.00 x 10-2 moles of SO2 and 2.00 x 10-2 moles of O2 were placed in a 2.00L reaction chamber. The chamber contained 7.5 x 10-3 moles of SO3 when equilibrium was established at 727oC.

    asked on February 25, 2010
  74. 7th grade

    what is the modern atomic theory

    asked on November 19, 2009
  75. science

    i need to answer these statements true or false:- ive answered some but stuck on others. 1)only animals respire - false 2)respiration uses oxygen 3)respiration uses up carbon dioxide 4)only green plants photosynthesise-true 5)all living things respire-

    asked on October 6, 2009
  76. Chemistry

    Xenon of mass 5.08 g reacts with fluorine to form 9.49 g of a xenon fluoride. What is the empirical formula of this compound? A) XeF6 B) XeF4 C) XeF2 D) XeF E) Xe2F I am not familiar with these types of empirical formula problems. If I'm given the

    asked on March 23, 2009
  77. Math

    Last week, Marcia played goalkeeper for her hockey team. She stopped 20 out of 30 shots on goalm . This week, marcia faced 36 shots. She stopped shots on goal in the same ratio as the previous week. How many shots did marcia stop?

    asked on September 28, 2008
  78. Physics

    What is the energy of this type of radiation: 6.32 x 10^20 s^-1 ?

    asked on September 9, 2008
  79. Mathematics

    A bowl contains 12 white pebbles and 7 black pebbles. A pebble is chosen and not replaced, then another pebble is picked. What is the probability that the first one is a white pebble and the second one a black pebble?

    asked on May 7, 2020
  80. math

    Ali is driving his motorhome. it uses 4 gallons of gas for every 32 miles. complete the table below. if he uses 7 gallons of gas how many miles would he have traveled. and if he used 10 gallons of gas how many miles would he have traveled?

    asked on April 20, 2020
  81. Algebra

    In a classroom of 20 students. 14 of them have brown eyes. If a teacher picks 2 students at random to pass out supplies, what is the probability she chooses 2 students without brown eyes?

    asked on April 20, 2020
  82. math

    Nicole drew a scale drawing of a city park. The soccer field is 59 centimeters long in the drawing. The actual field is 118 meters long. What scale did Nicole use for the drawings? * 10 points

    asked on April 8, 2020
  83. math

    454.4 rounded to the nearest gram

    asked on April 1, 2020
  84. social studies

    what geographic fetures of of arkansas made it difficult for settlers to travel? select all that apply. a-mountains b-the mississippi river c-forests d-rivers in the southeast

    asked on March 3, 2020
  85. social studies

    in what ways did the geography of arkansas influence both settlement and cultural development of the mississippi alluvial plains and ozark mountain regions? plz help!!!! *write out answer*

    asked on February 29, 2020
  86. Science

    What is e unbalanced force that slows down a ball rolling across the floor is...

    asked on January 15, 2020
  87. Social studies

    Which features of the roman government limited individual power? Select the 2 correct answers. A. The senate was the most powerful branch of government. B. The assemblies were a form of direct democracy. C. The two consuls could veto each others actions.

    asked on December 13, 2019
  88. earth science

    how can a magnitude 8.0 earthquake be classified as a low intensity earthquake?

    asked on November 25, 2019
  89. Vectors

    Does the line with equation (x, y, z) = (5, -4, 6) + u(1,4,-1) lie in the plane with equation (x, y, z) = (3, 0, 2) + s(1,1,-1) + t(2, -1, 1)? Justify your answer algebraically

    asked on July 20, 2019
  90. Math

    Tyrel eats 1/2 of a pizza. Dana eats 1/3 of what Tyrel didn’t eat and feeds the red to the dog. How much of the pizza did the dog get?

    asked on April 26, 2019
  91. History

    How did the Cold War affect American life ?

    asked on April 25, 2019
  92. History

    . How and why did the role of American women change during World War II? Why was that change temporary? What sort of work did women do, and how were they received in their work?

    asked on April 24, 2019
  93. science

    i have to design one dimensional model and I need to know why thermal is so important? Thanks

    asked on March 13, 2019
  94. Math

    Write 0.5% as a fraction.

    asked on February 27, 2019
  95. Math

    Martin you some apples to make muffins Omar use some apples to make applesauce Omar used five fewer than half as many apples as Martin use? Could Martin has used 10 apples why or why not use expression to help you decide show your work. I need help

    asked on February 25, 2019
  96. Business and Personal Law

    So I have a project and I need help on finding a court case for Retirement/Wills. The court case has to be Interesting,Unusual,Funny, Outrageous/Frivolous, Or, all of the above. Do you know where to find any interesting cases or know any cases that is

    asked on February 12, 2019
  97. Math

    14 oz for $3.50 or 24 oz for $5.28.Which size bag is the better buy?

    asked on November 12, 2018
  98. English, Film

    I am writing a sound analysis essay for class about the film "Call Me By Your Name," and I'm stuck on what to make the my third paragraph about. Here's the prompt: Pick any film you like and write a 2-page paper analyzing the sound design of that film

    asked on July 2, 2018
  99. Math

    Wendy saves 30% of her income each month. ⅜ of her expenditures is spent on cosmetics, ⅙ of it is spent on transport and ⅖ of the remainder is spent on food. If she spends $469 on cosmetics and food altogether, how much does she save each month?

    asked on April 18, 2018
  100. mass

    why dose the mass not change if you brake a cookie in have

    asked on March 14, 2018


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