Most popular questions and responses by lara
  1. Math

    Your long distance telephone providers offers two plans.Plan A has monthly fee of $15 and $0.25 per minute. Plan B has a monthly fee of $20 and $0.05 per minute.Write and solve an equation to find the number of minuts that you must talk to have the same

    asked on September 18, 2016
  2. Chemistry

    The amount of energy released by burning a fuel source, measured in energy per mass, is called the fuel value. If all the energy obtained from burning 1.25 pounds of butane (fuel value is 10.85 kcal/g) is used to heat 120.0 kg of water at an initial

    asked on March 22, 2013
  3. English grammar

    Select all the statements that apply to the sentence below. She did not believe that he actually knew the rules of bowling. -The sentence contains a gerund.

    asked on July 22, 2015
  4. English grammar

    Identify the verbal in this sentence as infinitive, gerund or participle. They cried, but there was none to save them: even unto the LORD, but he answered them not. (Psalm 8:41) I chose infinitive because "to save them" looks like an infinitive that

    asked on July 22, 2015
  5. English grammar

    Identify the verbal in this sentence as infinitive, gerund or participle. The old woman slept, not realizing she was no longer poor. I'm not sure if this is a gerund or a participle. "Not realizing" seems to be describing the old woman. I can't see how it

    asked on July 22, 2015
  6. Chemistry

    Of the following metals, which ions are most easily reduced? aluminum*** iron mercury potassium

    asked on May 25, 2016
  7. physics

    two charges attract each other with a force of 1.5 N. what will be the force if the distance between them is reduced to one-ninth of its original value?

    asked on April 25, 2010
  8. yetf8edfueidcyt87e

    a farmer wishes to fence off a rectangular field with 1,000 feet of fencing.if the long side of the field is along a stream, express the area of the field as a function of its width

    asked on October 13, 2012
  9. maths

    A water tank has the shape of a rectangular prism of base 50 cm2. This tank is being filled at the rate of 12 liters per minutes. Find the rate at which the height of the water in the water tank increases; express your answer in millimeters per second.

    asked on February 3, 2014
  10. MATHS

    Two different schools (A and B) have the same number of pupils. The ratio of the boys in school A and the boys in school B is 2:1 and the ratio of the girls in school A and the girls in school B is 4:5. Find the ratio of the boys in school A to the girls

    asked on February 2, 2014
  11. Statistics

    Anger and Snap Judgments Read the article entitled “Anger Can Cause Snap Judgments” and answer the following questions. ANGER CAN CAUSE SNAP JUDGMENTS Anger can make a normally unbiased person act with prejudice, according to a forthcoming study in the

    asked on February 16, 2015
  12. physics

    consider three identical metal spheres a b and c. sphere a carries a charge of +5q. sphere b carries a charge of -q. sphere c carries no net charge. spheres a and b are touched together and then separated. sphere c is touched to sphere a and separated from

    asked on April 22, 2010
  13. statistics

    investigators at an agricultural research facility randomly assigned equal numbers of chicken to be housed in two rooms. In room #1, chickens experienced normal day/night cycles. In the other room, lights were left on 24 hours a day. The objective was to

    asked on March 24, 2011
  14. Chemistry

    three liquids have densities of 1.15g/m, 0.79g/ml, and 0.95 g/ml. When the liquids, which do not mix, are poured into a graduated cylinder, the liquid at the top is the one with a density, in g/ml, of ?

    asked on September 29, 2015
  15. physics

    three charges are fixed to an x, y coordinate system. a charge of +18 µC is on the y axis at y= +3.0 degree m. a charge of -12 µC is at the origin. last, a charge of +45 µC is on the x axis at x= +3.0 m. determine the magnitude and direction of the net

    asked on April 27, 2010
  16. Maths- yr 5

    Tom spent 1/5 of his money and 1/4 of the remainder on a magazine. He had $25.80 left. How much was the magazine? A $5.10 B $6.45 C $8.60 D $7.80

    asked on January 16, 2014
  17. Physics

    The radius of moon is 27% of the earth radius and its mass is 1.2 % of the earth mass find the acc due to gravity on surface of moon?

    asked on September 28, 2018
  18. math

    divide 1.702 by .06 gave answer correct to two decimal places.

    asked on February 9, 2013
  19. Business Math

    1. Lee Holmes deposited $16,700 in a new savings account at 6% interest compounded semiannually. At the beginning of year 4, Lee deposits an additional $41,700 at 6% interest compounded semiannually. At the end of year 6, what is the balance in Lee’s

    asked on October 29, 2013
  20. statistic

    Your professor tells you that if you score an 85 or better on your midterm exam, then you have a 90% chance of getting an A for the course. You think you have only a 50% chance of scoring 85 or better. Find the probability that your score is 85 or better

    asked on September 27, 2016
  21. Statistics

    If 5% of electric bulb manufactured by a company are defective find the probability that in a sample of 100 bulbs. (1)None if defective (2) 5 bulbs are defective e -5=0.007

    asked on May 19, 2019
  22. Trig

    If cot theta = -12/5 and the terminal side of theta lies in quadrant II find secant theta

    asked on February 13, 2016
  23. science

    what is Glucose most likely found in fish, chicken, apples,and olive oil?

    asked on September 11, 2019
  24. algebra

    A country's population in 1993 was 171 million estimate the population in 2012 using the exponential growth formula round your answer to the nearest million?

    asked on April 16, 2015
  25. Chemistry

    In the zinc-copper cell, Zn(s) | Zn^+2(1M) || Cu^+2(1M) | Cu(s), which electrode is negative Cu^+2 Cu(s) Zn(s) Zn^+2***

    asked on May 25, 2016
  26. Trig

    Find the exact value of csc 4pi/3 What I have determined thus far: 4pi/3 = 60 degrees sin = square root of 3/2

    asked on February 13, 2016
  27. chemistry

    What mass of melamine, C3N3(NH2)3, will be obtained from 159.5 kg of urea, CO(NH2)2, if the yield of the overall reaction is 79.0 %?

    asked on March 9, 2011
  28. math

    at noon the temperature is .6.f but the temperature drops 2 degrees per hour for the next few hours?what is the temperature at 4 pm?

    asked on February 23, 2017
  29. MATHS

    This bank machine has four rows of buttons 1 2 3 4 5 6 7 8 9 0 Sam has a 4-digit bank number that uses one button from each row. For example his bank number could be 0571. How many different possibilities for Sam's bank number are there? The answer should

    asked on December 1, 2013
  30. MATHS

    Carrie and Luke drank 4/5 of a bottle of juice. Carrie drank half as much as Luke. What fraction of the juice did Carrie drink? Answer given is 4/15

    asked on December 3, 2013
  31. Math

    While walking from her house to school, Miriam walks at a pace of 5 km/h. When she walks in the hallways at school, she slows down to 3 ½ km/h. If she spent 2 ½ hours walking to and from school and ¾ of an hour walking in the hallways, what was her

    asked on December 20, 2017
  32. statistics

    Bill wants to write the equation that demonstrates the model for explaining quarter-life crisis. He is using optimism, locus of control, income, and years since completing college as explanatory variables. Which of the following equations is most

    asked on February 17, 2011
  33. Maths

    Sophie borrowed $2000 at a simple interest rate of 15% for 3 years to repay the loan and has $900 in interest. If Sophie's interest was calculated at the same rate on the balance owing, how much would she have owed after 6 months if she repaid $40 per

    asked on March 17, 2017
  34. MATHS

    Donna wants to cut out circular discs of radius 7cm from a cardboard measuring 50cm by 70cm. What is the maximum number of circular discs that can be cut out from the cardboard?

    asked on December 29, 2013
  35. Fluid Mechanics

    A cylinder with internal diameter of 5cm and 15 cm high is filled up with an unknown substance. The mass of the cylinder is 4.6 kg which is 300% of the unknown substance mass. Determine the density and the specific gravity of the unknown substance.

    asked on September 21, 2014
  36. Physics

    a ball thrown upward with a velocity of 19.6m/s will come momentarily in rest in? Ans 2sec

    asked on October 19, 2018
  37. MATHS

    The hot dog cost $2.20 each. Greg sold one hot dog every 2 minutes at a festival. At this rate, how many minutes would it take to sell $110 worth of hot dog? Please help! My result is 100 but the actual correct answers is 25.

    asked on April 21, 2019
  38. Linear Algebra

    Demonstrate that t T: P3 -> P3, Tp = p' is a linear function. I know that to demonstrate if something is a linear function I must, check if the sum and multiplication with a scalar is linear. But I am a bit concerned cause when I derivate P3 it will always

    asked on April 10, 2019
  39. capitalization

    i have a doubt if "the" should be capitalized in this sentence: Thomas Jefferson wrote the Declaration of Independence for our country.

    asked on August 17, 2010
  40. MATHS

    Joyce had some money. She bought a dress, a shirt and a watch. She spent 1/5 of her money on a shirt. The shirt cost $24 less than a dress. The watch cost $102. She was left with 1/4 of the amount of money she had at first. How much money did Joyce have at

    asked on October 8, 2019
  41. chemistry

    Determine the concentration of a solution of Mg(NO3)2 given the precipitate formed is 2.97 g and there are 50mL of Mg(NO3)2 and 50 mL of NaOH. Please show all work for each step clearly

    asked on September 18, 2012
  42. Math

    Pamela can run 100 meters in 12.5 seconds and Josalin can run 150 meters in 20 seconds. If they both ran a 400 meter race at this rate, how many meters ahead would Pamela cross the finish line before Josalin?

    asked on September 21, 2016
  43. Math Probability problem

    Tony has 3 jackets and 2 shirts and 2 pants. He wants to wear three items every day. How many outfits he can choose of the same clues and/or of different clues

    asked on May 15, 2016
  44. chem

    0.1802 g sample of a chlorocarbon compound was analyzed by burning in oxygen and collecting the evolved gases in a solution of sodium hydroxide. After neutralizing, the sample was treated with 39.50 mL of a 0.025 M AgNO3. This precipitated the Cl- as AgCl

    asked on April 11, 2012
  45. Physics

    A cannon placed at the top of a 100.0 m high cliff fires horizontally to a platoon of Hussars situated initially 1.0 km away from the base of the cliff. At what initial velocity should the cannon shell be fired assuming the hussars are moving with a

    asked on July 10, 2011
  46. grammar

    is my capitalization right in this sentence: If you take interstate 10 and travel west, you will see Katy Mills one of the largest malls in Texas.

    asked on August 18, 2010
  47. Awards

    What kind of awards do they give out @ a 7th grade/8th award ceremony???

    asked on October 16, 2011
  48. physics

    an electron and a proton are initially very far apart (effectively an infinite distance apart.) they are then brought together to form a hydrogen atom, in which the electron orbits the proton at an average distance of 5.29 x 10 -11 m. what is EPE final -

    asked on May 2, 2010
  49. Chemistry

    Which atom has a change in oxidation number of –3 in the following redox reaction? K2Cr2O7 + H2O + S - - > KOH + Cr2O3 + SO2 Cr^+3 - - > Cr2O7^-2 Fe^+2 - - > Fe^+3 Fe^+3 - - > Fe^+2 Cr2O7^-2 - -> Cr^+3***

    asked on May 25, 2016
  50. MATHS

    Mr Wood makes tables with 4 legs, and stools with 3 legs. Nine customers ordered 8 items each. Each order was different. How many legs are needed altogether?

    asked on December 1, 2013
  51. MATHS

    24 1c coins are set out in a row on a table Then every 2nd coin is replaced by a 2c coin every 3rd coin is replaced by a 5c coin every 4th coin is replaced by a 10c coin every 5th coin is replaced by a 20c coin every 6th coin is replaced by a 50c coin and

    asked on November 19, 2013
  52. social studies

    Theodore Roosevelt wanted to build a canal in Central America. Why was there opposition to Roosevelt's plan?

    asked on January 20, 2010
  53. chem

    The amount of iron in a meteorite was determined by a redox titration using KMnO4 as the titrant. A 0.4408 g sample was dissolved in acid and the liberated Fe3+ quantitatively reduced to Fe2+. Titrating with 0.0220 M KMnO4 requires 41.38 ml to reach the

    asked on April 11, 2012
  54. chemistry

    You can temporarily receive relief from acid indigestion by using an antacid that contains a base. Why is it not a good idea to use an antacid routinely? (2 reasons)

    asked on July 23, 2016
  55. Trig

    Find all values of theta where 0degrees

    asked on February 13, 2016
  56. physics

    A light beam containing red and violet wavelengths is incident on a slab of quartz at an angle of incidence of 50.0°. The index of refraction of quartz is 1.455 at 660 nm (red light), and its index of refraction is 1.468 at 410 nm (violet light). Find the

    asked on April 1, 2013
  57. Ph CHEM

    A solution is found to contain 1 x 10-4 OH− ions, determine the pH of this solution. I did this problem and got 4 but it is not going in as correct. -log(1*10^-4)=4

    asked on November 27, 2012
  58. physics

    A stone is projected vertically upward with a speed of 20 m/s. a. What is its velocity at the end of 2s? b. What is the height reacted after 2s?

    asked on February 3, 2016
  59. MATHS

    The ratio of the number of males to the females at a performance is 5 : 7. 1/4 of the males and 3/4 of the females are children. What is the ratio of the number of adults to children? Express your answer in simplest form.

    asked on December 30, 2013
  60. Chem- Percent Yield

    When HgO is heated, it decomposes into elemental mercury and diatomic oxygen gas. If 42.9 g of Hg is obtained from 70.1 g of the mercuric oxide, what is the percent yield of the reaction?

    asked on October 11, 2012
  61. 11th grade

    Hello there i am writing a book and i would like to know how many subjects does an eleventh grader have per day. please reply as soon as possible. thank you very much. P.S: This question is meant to be answered by an american individual due to various

    asked on November 6, 2009
  62. Chemistry

    Q49 One litre of solution contain 30g acetic acid the active mass of acetic acid is? Ans 1.0mol/L

    asked on September 30, 2018
  63. maths

    Alan is using matchsticks to make isosceles triangles. Isosceles triangles have at least two sides the same length.How many different single isosceles triangles can he make with 45 matchsticks, using all the matchsticks each time? The answer is 11, but I

    asked on November 6, 2013
  64. chemistry

    A basic buffer is prepared by adding 0.3310g of NH4Cl to 1.00L of 0.2088 M NH3. Kb (NH3) = 1.8x10-5.

    asked on March 21, 2012
  65. Political Science: American Government

    Can you please tell me if these are correct? Thank you! Generally, people with lower incomes, less education, and lower job status: a. are more conservative in their political opinions. b. are more liberal in their political opinions. c. are more moderate

    asked on March 11, 2011
  66. chemistry

    A sample of argon gas occupies a volume of 950 mL at 25.0°C. What volume will the gas occupy at 50.0°C if the pressure remains constant?

    asked on June 12, 2010
  67. Math

    I NEED URGENT HELP WITH THIS QUESTION!!!! Question: The terms of a geometric sequence are 4x+1, x+4, and 10-x. Determine the value of x.

    asked on January 22, 2019
  68. Probability

    Part A: The difference A\B of two subsets A and B of is the set A∩( \B) of all points of which are in A but not in B. Show that if A, B ∈ F , then A \ B ∈ F . Part B: The symmetric difference A △ B of two subsets A and B of is defined to be the set

    asked on October 9, 2018
  69. Trig

    Find all values of theta where 0degrees

    asked on February 13, 2016
  70. MATHS

    walking at 3/4 of his usual speed, a man is late by 2.5 hrs. What is he usual time?

    asked on March 20, 2014
  71. Grade 5 Maths

    A coin box contained some twenty-cent and fifty-cent coins in the ratio 4:3. After 20 twenty-cent coins were taken out to exchange for fifty-cents coins of the same value and put back in the box, the ratio of the number of twenty-cent coins to the number

    asked on January 19, 2014
  72. college geometry

    if triangle mnp approximate triangle srt with proportionality factor k, show that if ma and sb are altitudes of the given triangles, then ma = ksb in

    asked on October 11, 2012
  73. chem

    An experimental alloy contained by copper and tantalum. 3.7950 g of the alloy was dissolved and analyzed gravimetrically. The copper was precipitated and weighed as CuO, a mass of 0.1805 g was obtained. Calculate the %w/w Cu in the alloy. [Answer in 2

    asked on April 11, 2012
  74. physics

    A cart of 2kg travellin @6m/s collides wit another cart of mass of 0.4kg travellin in the same direction @ 2m/s. The 2kg cart bounc off and !@#$%^&inues wt 3m/s in the same direction after impact.calculate the velocity of the 0.4kg trolley afta collision

    asked on June 7, 2011
  75. grammar

    im confused if "earth" should be spelled with an uppercase. i would think so but just wanna make sure Hawaii has some of the most beautiful beaches on the earth. thanks :)

    asked on August 18, 2010
  76. Texas History

    What issues and events caused multiple claims to Texas?

    asked on September 15, 2016
  77. physics

    If you do 500J of work to elevate a bucket of water, what is its gravitational potential energy relative to its starting position? 500*10=5,000 5,000/500=10

    asked on March 13, 2015
  78. math(urgent)

    What is the value of the variable cost ? If the break even point is $ 130, the fixed cost is $ 330, selling price per unit is $ 25,and unit of sell is $50. (3 marks)

    asked on June 22, 2014
  79. MATHS

    A pie is cut into two equal parts. The first part of the pie is shared between Abdul and Kate. Kate has 3 times as much as Abdul. The second part of the pie is shared between Sarah and Ron. Ron has 3/5 as much as Sarah. The mass of Sarah's share of the pie

    asked on November 7, 2013
  80. chemistry

    what does it mean to draw the chemical structure of dichloromethane? does this just mean the 2d structure?

    asked on February 20, 2012
  81. math

    Is (5,2) a solution of 4x-2y=-6 I said no, am I right? I am working on another problem where they want to know if this system of equations is perpendicular or parallel or neither,5x+4y=2, 4x-5y=4 I said neither. Is this right? I am to solve by using

    asked on January 8, 2010
  82. economic history

    Could someone give me a short summary/bullet of the economic significance of the great voyages of discovery in particular for venice/portugal? Thanks xox

    asked on December 5, 2009
  83. Chemistry

    Q35 5 mol of H2O contain no of OH ions ? Ans 3.10×10^24ions

    asked on September 30, 2018
  84. math

    a photograph has an area of 80sq inches.the length of the photo is 1 1/4 width. what is the following dimension of the photgraph?

    asked on February 6, 2017
  85. Fluid Mechanics

    A cone with base radius of 5 cm and height of 20 cm is filled with oil with specific gravity of 0.85. Determine the dimension of cubic steel which its weight is equivalent to the oil weight. Steel Specific Gravity is 7.1

    asked on September 21, 2014
  86. MATHS

    Mrs Koh bought some pens, files and erasers. The ratio of the number of pens to the number of files to the number of erasers she bought was 1 : 2 : 3. The cost of each pen and eraser is $2.50 and $0.50 respectively. If she spent $60 on the pens and the

    asked on December 30, 2013
  87. MATHS

    Stacey spent 1/ 6 of her money on a purse and 7/12 more money on a bag than on the purse. What fraction of her money did she spend?

    asked on December 19, 2013
  88. Novel 1984

    1)When Regardless of what the ministry of love did to you what one thing according to Winston could they never do in the book 1984? 2)describe the event that promoted winston's mother disappearance 3)how does julia give winston hope about the future when

    asked on December 14, 2011
  89. Math

    Did I get the right answer simplify: -6[-28-(20-48)] I got that it simplified to 0 Am I right?

    asked on January 7, 2010
  90. Chemistry

    Q31 How many moles are present in 20 cm^3solution of 0.05M HCL? Ans 10^-3mol

    asked on September 30, 2018
  91. Chemistry

    Q54 The ratio of the rate of diffusion of two gases is1:3 then ratio of the molecular wieght? Ans 9:1

    asked on September 30, 2018
  92. Physics

    Change on each plate of a parallel plate capacitor is 6microC and capacitance is 4 microf what is p.d between plates? Ans 1.5 volt

    asked on September 30, 2018
  93. Chemistry

    How many mole of O2 are needed for complete combustion of two mole of butane C4H10? ANS 13

    asked on September 30, 2018
  94. Math

    what does skip half an increment mean in graphs

    asked on October 3, 2016
  95. Chemistry

    If there are 5,280 ft=1.00 mile ,how many miles are in 50,000 ft?

    asked on August 5, 2015
  96. MATHS

    Ken and Sam shared some marbles. The ratio of the number of marbles Ken has to the number of marbles Sam has is 5:3. If Ken's marbles increases by 15%, what percentage of Sam's marbles must be decreased so that the total number of marbles they have

    asked on January 1, 2014
  97. MATHS

    This question has mentioned 'pattern of numbers', does that means not just do simple calculation from left to right OR there is a fast way to solve this question, please help. Look at this pattern of numbers. 7x 11 x 13 x 1 = 1001 7x 11 x 13 x 2 = 2002 7x

    asked on October 21, 2013
  98. Chemistry

    If 31.00 mL of a dilute solution of lime water (calcium hydroxide) required 10.10 mL of 0.246 M hydrochloric acid solution for neutralization to a methyl red end point, calculate the molarity of the lime water. Can you please explain how to do it? Do I use

    asked on April 2, 2011
  99. algebra

    Is (5,2) a solution of 4x-2y=-6 I said no, am I right? I am working on another problem where they want to know if this system of equations is perpendicular or parallel or neither, I said neither. Is this right? I am to solve by using elimination: 2x+3y=1,

    asked on January 8, 2010
  100. math

    I don't know how to rewrite an expression using rational exponent notation. The problem is shown as ^3 square root of 11.

    asked on May 20, 2008


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