1. math 117/ algebra

    Fungicides account for 1/10 of the pesticides used in the US. Insecticides account for 1/4 of all pesticides used in the US. The two ratio of herbicides to insecticides used in the US can be written 1/10 ÷ 1/4 . Write this ratio in simplest form. see the

    asked by Diana on July 11, 2007
  2. English

    Choose the correct form of the possessive for the underlined word in the following sentence: “A YEARS worth of hard work has finally paid off.” ( "years" is underlined) should it be: year years years' year's

    asked by Anonymous on June 18, 2016
  3. College Algebra

    Pencils cost 20 cents and pens cost 50 cents. Mabel buys x pencils and y pens, spending $2.00. Write an equation in standard form with integer coefficients that relates x and y.

    asked by Haley on November 20, 2013
  4. ratios?

    how would i write this ratio in simplest form? 30 seconds to 5 minutes in ratios you should have the same units, then they will cancel and you don't have to write them so how many seconds are there in 5 minutes? your simple ratio is then found:

    asked by kiki on May 16, 2007
  5. geometry

    Let u = [2,−3, 1] and v = [0, 1, 4]. Calculate the vector u − v. Place u and v tail-to-tail to form two sides of a triangle. With regard to this triangle, what does u−v represent? Calculate the number u•u and discuss its relevance to the diagram

    asked by sarah A on April 12, 2010
  6. math

    Let u = [2,−3, 1] and v = [0, 1, 4]. Calculate the vector u − v. Place u and v tail-to-tail to form two sides of a triangle. With regard to this triangle, what does u−v represent? Calculate the number u•u and discuss its relevance to the diagram

    asked by sarah A on April 13, 2010
  7. science

    I have to make a 3-d model of a hurricane. Does anyone have any suggestions for how I can do this? The materials to use, etc? an easy thing to use is cotton balls, pained dark. To get a good picture, use google images, or some other image gallery. the

    asked by Andrew on October 30, 2006
  8. Government

    article or story about the changing demographics of legislators who serve in the Congress or state legislatures. Legislatures have changed in many ways since the textbook was first written in 2001. You are to locate examples of these changes and be

    asked by Ano on September 16, 2017
  9. English

    Hi, I have to write up paragraphs on these themes from Frankenstein: a) good vs. evil (manichean) b) duty of responsibility c) nature vs. nurture However, I'm confused about what the differences between these points are... For example, in "nature vs.

    asked by Candice on December 26, 2011
  10. pre calculus

    a satellite is launched to take pictures during its orbit. its low and high points over the surface of the earth are 119 and 122800 miles. Find the polar equation if the center of the earth is the focus. assume that the earth has a radius of 4000 miles.

    asked by Anonymous on November 5, 2007
  11. Math (Please help immediately)

    Two angles form a linear pair. The measure of one angle is 8 times the measure of the other angle. Find the measure of each angle.

    asked by C on September 6, 2012
  12. ramjas

    the sum of the digit of a two digit number is 13 and the diffrence btween the number and that form by reversing the digit is 27, find the number...

    asked by ashu on August 12, 2014
  13. math

    Lines a and b are parallel. When they are cut by transversals, they form a triangle. es025-1.jpg What is es025-2.jpg es025-3.jpg

    asked by chris on April 19, 2016
  14. Precalculus

    Explain how to do these please. 1. solve x=log(base2)*1/8 by rewriting in exponential form. 2. Solve log(3x+1)=5 3. Solve log(base x)8=-1/2

    asked by Melinda on January 29, 2012
  15. math

    Express the following in simplest form: (complex fraction) Sin(x) - Cos(x) Cos(x) Sin(x) _______________ 1 - 1 Cos(x) Sin(x)

    asked by nellie on February 26, 2010
  16. Math

    a map of Vicksburg Mississippi has a scale of 1 mile to the inch. The map has been reduced so that 5 inches on the original map appears as 1.5 inches on the reduced map. The distance between two points on the reduced map is 1.75 inches. What is the actual

    asked by Micah on February 2, 2014
  17. chemistry

    Does an insoluble solid dissociate into ions? Is the reaction reversible? Will an equilibrium reaction form when a chemical reaction forms an insoluble solid? Why, or why not?

    asked by Anonymous on April 23, 2012
  18. Physics Help Please --- Urgent

    A thin converging lens is found to form an image of a distant building 24 cm from the lens. If an insect is now placed 16 cm from this lens, how far FROM THE INSECT will its image be formed? A) 64 cm B) 72 cm C) 32 cm D) 96 cm E) 48 cm

    asked by Tanya on May 2, 2015
  19. Pre-cal

    The number cis 75 + cis 83 + cis91 +...+ cis 147 is expressed in the form r cis(theta), where 0

    asked by Josh on August 23, 2014
  20. math

    I have a problem. Conner's age is 4 and josh's age is 12. I need to find out how many years until conner is half of josh's age and I am not sure how to put this in equation form.

    asked by Janice on October 2, 2009
  21. Algebra

    A sphere has a radius of 4x + 1. Which polynomial in standard form best describes the total surface area of the sphere? Use the formula S = 4(pi)r2 for the surface area of a sphere.

    asked by Sandra on March 7, 2014
  22. algebra--1 question

    A sphere has a radius of 4x + 1. Which polynomial in standard form best describes the total surface area of the sphere? Use the formula S = 4(pi)r^2 for the surface area of a sphere. 16(pi)x^2 + 16(pi) 16(pi)x^2 + 48(pi)x + 16(pi) 36(pi)x^2 + 48(pi)x +

    asked by SkatingDJ on March 24, 2015
  23. Geometry

    Maria is making a stained glass window in the form of a kite. The width of the window must be 15 in., and she only has enough stained glass to cover 60 in. What should the height of the window be? A. 4 in. B. 6 in. C. 8 in. D. 12 in.

    asked by anon on February 9, 2014
  24. Math

    A contractor's crew can frame 3 houses in a week. How long will it take them to frame 54 houses if they frame the same number each week? I have to write the equation in the form of y=mx+b Would it be: y=3x+54 y=18

    asked by Patrick on October 17, 2018
  25. Urgent gr11 trig!!!

    A tidal wave reaches low tide at 3:00AM and high tide at 3:00PM. The tide can rise and fall 10m from the sea level. If at low tide the water level is 2m above the seabed (bottom of the sea) a) determine an equation to model the sea level above the sea bed

    asked by Rose on January 30, 2018
  26. Microeconomics

    Suppose that two people, Michelle and James each live alone in an isolated region. They each have the same resources available, and they grow potatoes and raise chickens. If Michelle devotes all her resources to growing potatoes, she can raise 200 pounds

    asked by Lee Mitchell on March 16, 2012
  27. Physics(please help)

    Four very thin rods, each 8.3 m long, are joined to form a square. The center of mass of the square is located at the coordinate origin. The rod on the right is then removed. What are the x- and y-coordinates of the center of mass of the remaining

    asked by Hannah on June 3, 2012
  28. year 7 music

    i know it has been asked many times over the last few days but i need to explain ternary form and what is played / song in this structure. i have found a song twinkle twinkle little star but i don`t know how to explain how it is played in this way.i have

    asked by nicky on January 29, 2008
  29. math!

    1) A lottery is set up in which players pick six numbers from the set 1, 2, 3, ... , 39, 40. How many different ways are there to play this lottery? (In this game the order in which the numbers are picked does NOT matter.) 2) A club of 15 students will

    asked by BreAnna on April 16, 2011
  30. physics

    A rocket is fired at an angle from the top of a tower of height h0 = 65.5 m . Because of the design of the engines, its position coordinates are of the form x(t)=A+Bt2 and y(t)=C+Dt3, where A, B, C , and D are constants. Furthermore, the acceleration of

    asked by justin on September 19, 2015
  31. college sci/241

    Think of some of your favorite foods when you were 10 years old. Are they still your favorites? Do you think you will be eating the same foods you eat today 20 years form now? What are some of the reasons dietary modifications may be needed in different

    asked by Nicole on June 10, 2010
  32. Chemistry

    Calculate the amount of energy released per gram of nuclei when 2 protium nuclei react to form deuterium nucleus (protium = 1.00782 amu, deuterium = 2.01410 amu). The answer in the book is -2.0 x 10^10 J, but I don't have any idea on how to do this. Please

    asked by Nina on March 15, 2014
  33. Geometry

    Problem: ABCDE$\ is an equilateral pentagon with side length 2 in which angle B= angle E=120 degrees. The area of ABCDE can be expressed in the form square root of x + square root of y for some integers x and y. Find x+y. I don't understand. I really need

    asked by AJ on January 29, 2017
  34. Probability

    Let X be a random variable that takes non-zero values in [1,∞), with a PDF of the form fX(x)=⎧⎩⎨cx3,0,if x≥1,otherwise. Let U be a uniform random variable on [0,2]. Assume that X and U are independent. What is the value of the constant c? c= -

    asked by qwerty on April 21, 2015
  35. biochemistry lab

    A) If you make up a solution of 50 mL of 0.1 M TRIS in the acid form, what will be the pH? B) If you add 2 mL of 1M NaOH to the solution in part A, what will be the pH? If it is needed, here is some addition information: TRIS pka= 8.3 mw of TRIS-HCL= 157.6

    asked by erin on February 2, 2008
  36. English

    Identify the part of speech or the form of a part of speech in the underlined portion of the next sentence. Exhausted and tired, I went home and immediately collapsed on the couch. A. Noun B. Verb C. Adjective D. Adverb immediately is the underlined word D

    asked by Angela on April 7, 2014
  37. Math-Calculus

    Please Help D:. Min/Max Problems 4. Joan has 50ft of interlocking stone available of fencing off a flower garden in the form of a circular sector. Find the radius of the circle that will yield a flower garden with the largest are if Joan uses all the

    asked by Cara on March 6, 2013
  38. please help this is a geometry question

    An equilateral triangle of side 14 centimeters is revolved about an altitude to form a cone. What is the number of cubic centimeters in the volume of the cone? Express your answer to the nearest whole number, without units. I have tried solving this but it

    asked by Knights on December 5, 2012
  39. Technology

    ok..so i have these labs in technology. and i'm on the first one. here's how it goes: ACTIVITY 1A-DESIGN PROBLEM Background: Technology is the application of knowledge to create machines, materials, or systems to help us make work esasiers, to make life

    asked by y912f on October 29, 2009
  40. physics

    Two identical thin wires are oriented along the x and y axes. With current on x plane going North. Current on y plane going West.Both carry the same current I, and there is no electrical contact between the wires. The points A, B, C, D are each equidistant

    asked by Melissa on March 16, 2013
  41. math

    3 points Save When Patricia sells her General Motors common stock at the same time that Brian purchases the same amount of General Motor's stock, General Motors receives: the "spread" between the Bid and Ask of the transaction. the dollar amount of the

    asked by brittany on July 24, 2008
  42. Math

    A weight attached to a spring is pulled down so that it is 10 cm from the floor and is released so that it bounces up and down. When the effects of friction and gravity are ignored. It's height can be modeled by a sine function of the time since it started

    asked by Safaa on March 6, 2012
  43. Math

    A weight attached to a spring is pulled down so that it is 10 cm from the floor and is released so that it bounces up and down. When the effects of friction and gravity are ignored. It's height can be modeled by a sine function of the time since it started

    asked by Safaa on March 6, 2012
  44. STATISTICS

    Births are approximately uniformly distributed between the 52 weeks of the year. They can be said to follow a uniform distribution from one to 53 (spread of 52 weeks). a. X~ b. Graph the probability distribution. c. f(x)= d. u= e. o= f. Find the

    asked by BORNIUCS on September 19, 2015
  45. Math help please

    In this problem you will use Rolle's theorem to determine whether it is possible for the function f(x) = 8 x^{7} + 7 x - 13 to have two or more real roots (or, equivalently, whether the graph of y = f(x) crosses the x-axis two or more times). Suppose that

    asked by sheks on November 26, 2013
  46. acounnting

    9. The materials price variance reveals the difference between ____________________. (Points : 1) the price paid for materials and the quantity of materials used the quantity of materials used and the quantity of materials allowed for good output none of

    asked by Jenny on December 12, 2016
  47. Math

    In triangle ABC, D bisects side BC, G bisects side AB, and the points E and F trisect side AC. What is the area of the shaded polygon, if the area of ABC is 108? I tryed to find the area of triangles on the side and I figured that if you put a line from

    asked by Lily on December 7, 2013
  48. Physics

    On a clear day, the Earth’s atmospheric electric field near the ground has a magnitude of 100 N/C and points vertically down. Inside the ground, the electric field is zero, since the ground is a conductor. Consider a mathematical box of 1.0 m x 1.0 m x

    asked by Amy on February 14, 2010
  49. Math please help urgent

    In triangle ABC, D bisects side BC, G bisects side AB, and the points E and F trisect side AC. What is the area of the shaded polygon, if the area of ABC is 108? I tryed to find the area of triangles on the side and I figured that if you put a line from

    asked by Lily on December 7, 2013
  50. Math

    In triangle ABC, D bisects side BC, G bisects side AB, and the points E and F trisect side AC. What is the area of the shaded polygon, if the area of ABC is 108? I tryed to find the area of triangles on the side and I figured that if you put a line from

    asked by Lily on December 7, 2013
  51. Biology

    Following my previous question: jiskha/display.cgi?id=1200944514 use the Galapagos Islands as an example try to produce an action plan of at least 5 points that could reduce the risk of manmade extinctions occurring in vulnerable habitats. Give a brief

    asked by Anonymous on January 21, 2008
  52. Geometry

    A. Derive the distance formula (d) shown below for points A = (x1, y1) and B = (x2, y2). 2 2 1 2 2 1 d = (x − x ) + ( y − y ) Note: Look for an application of the Pythagorean theorem where the red line, segment AB, is the hypotenuse of a right

    asked by Charlie on June 17, 2013
  53. history

    1. Which of the following crimes would result in a slave’s execution? (Choose all that apply.) (2 points) murder failing to work diligently plotting a rebellion stealing food 2. Which of the following was true about the life of a slave? (1 point) They

    asked by You yo daddy's son on October 28, 2016
  54. Educational technology and online learning

    Which of the following sets is data would be represented best in a bar graph? A. the number of hot dogs consumed by the people entered in a hot dog eating contests B. The percentage of hot dogs consumed my women? C.the number of hot dogs consumed by the

    asked by Cici on December 6, 2016
  55. tech AGAIN

    3) Which of the following sets of data would be represented best in a bar graph? A.the number of hot dogs consumed by the people entered in a hot dog eating contest b. the percentage of hot dogs consumed by women c. the number of hot dogs consumed by the

    asked by connxus kid on December 14, 2017
  56. mathj

    Baker Company purchases a new delivery truck for $20,000. The truck is expected to have a useful life of 90,000 miles before replacement, and a salvage value of $2,000. In its first year the truck was driven 22,000 miles, and a further 19,000 miles in year

    asked by tj on February 8, 2012
  57. Computer Science

    If a file named "myfile" has -r--r--r-- permissions.  Write the command to change it to -rwxr-xr-- permissions using both the octal and symbolic modes of the appropriate command (octal mode was included in the instructor's lecture and published on this

    asked by Jay on October 25, 2017
  58. algabra

    Note: Remember to show all of the steps that you use to solve the problem. You have $59.95 in your wallet and want to buy some new CDs. If the CDs are $11.99 each, what number of CDs, x, can you buy? Write and solve an inequality. (2 points) *Step 1:

    asked by unknown on January 11, 2016
  59. math

    The weights of ice cream cartons produced by a manufacturer are normally distributed with a mean weight of 10 ounces and a standard deviation of 0.5 ounce.(a) What is the probability that a randomly selected carton has a weight greater than 10.21

    asked by Joe on November 20, 2017
  60. chemistry

    which of the following is true regarding the transition elements? A. Multiple oxidation states resulting from the involvement of d electrons in bonding is a characteristic of transition elements. B. Most transition elements have lower melting and boiling

    asked by Emiko on September 11, 2014
  61. please help

    Two point charges are fixed on the y axis: a negative point charge q1 = -34 μC at y1 = +0.19 m and a positive point charge q2 at y2 = +0.32 m. A third point charge q = +8.9 μC is fixed at the origin. The net electrostatic force exerted on the charge q by

    asked by jose on May 10, 2016
  62. magnets

    A proton with a velocity of 2.0 x 10^7 m/s in the horizontal (+x) direction enters a region of uniform magnetic field that is 1 meter wide and points out of the page with a magnitude of 0.05 Tesla. At what angle below the x-axis, in degrees, does the

    asked by James on November 20, 2013
  63. English (URGENT)

    How many paragraphs does a literary review have? This is a writing assignment for Grade 12 English. I need to write literary review on an article I find on the internet. I have an identification paragraph that talks about the author's credentials. Then I

    asked by John on December 12, 2011
  64. Chemistry

    Calculate E°cell (in volts) for a fuel cell that employs the reaction between methane gas and oxygen to form carbon dioxide and water. (to 4 significant figures) ∆G⁰f for CH4 = -50.5 kJ/mol ∆G⁰f for CO2 = -394.4 kJ/mol F = 96485/mol e- I got

    asked by Anonymous on April 12, 2013
  65. statistics

    Suppose a Stat 1450 web class has 15 males (8 are also students at OSU) and 12 females (7 are also students at OSU). What is the probability that a randomly selected student is either female, or also a student at OSU? Submit answer in decimal form and

    asked by john smith on February 8, 2014
  66. chemistry

    A salt contains only barium and one of halides ions. A 0.1480g sample of the salt was dissolved in water and an water and an excess of sulfuric acid was added to form barium sulfate which was filtered, dried and weighed its mass was found to be

    asked by Chansa on May 4, 2016
  67. math;););)

    Apply the 57-degree counterclockwise rotation about the origin to the vectors [1, 0] and [0,1], then use the image vectors (written as columns) to form the coe cient matrix M for the rotation. Test M by calculating the products M[1] [0] and M[0] [1 ].

    asked by Anonymous on January 11, 2017
  68. Art Ms. Sue?? Writeacher??

    Nineteenth-century sculptor Cordier also created busts of African men and women in addition to African Venus. Which of the following was most likely his source of inspiration? -interest in the African form -promoting human justice*** -promoting the

    asked by Amy on May 11, 2015
  69. English

    I'm writing a short answer, & i don't know if this quote goes with my explanation, the quote is,"three powerful nation,joined themselves together in the threat that if the U.S. blocked the expansion they would unite in ultimate action against the U.S." my

    asked by Clarissa on February 24, 2016
  70. Chemistry

    I would like to check my answer to the following question: The permanganate ion oxidizes bromide in acidic conditions to form bromine, manganese(II) ion and water. Give the balanced equation of the reaction. My answer: 3e- + 8H+ (aq) + MnO4- (aq) + 2Br-

    asked by Kelsy on May 18, 2015
  71. concude refuting paragraph

    i don't know what to do on this one. my teacher told that i need to get the readers attention again back to my thesis which is girls are better friends than men. here's the paragraph. However, some people think that men are better in handling friendships.

    asked by won sho han on July 13, 2011
  72. math

    Four players are playing a game involving choosing positions on a grid of size 3×8. Each player chooses a random position on the grid, then all players reveal their choices and a token is placed on each of the positions. The probability that the tokens

    asked by Mathslover Please help on May 5, 2013
  73. math

    A welder decides to make a pyramid shaped paperweight out of flat steel. the height of the pyamid is to be 3.5in and the square base has edges of 2.0in. how much sheet metal, in square inches, will he need to form the shell? to give weight, he is going to

    asked by williams on November 15, 2015
  74. Math Help

    Four players are playing a game involving choosing positions on a grid of size 3×8. Each player chooses a random position on the grid, then all players reveal their choices and a token is placed on each of the positions. The probability that the tokens

    asked by Mathslover Please help on May 8, 2013
  75. Social studies***help***

    please check my answers 1.A 2.D 1.Which of he following is the greatest threat to the island's resources? (central american and the caribbean) i included that because i think that is the islands. A.biodiversity B.hurricanes C.deforestation D.ecotourism

    asked by dalia on March 12, 2014
  76. science

    As temperature rises, solids generally become more soluble in water, but gases become less soluble. If a soft drink contains high concentrations of sugar and carbon dioxide, which of the following may be expected to happen if it is cooled down? A) Sugar

    asked by Valerie on January 18, 2012
  77. Spanish

    What do the following people like? Write the correct form of the verb gustar in each sentence. 1. A mí la cena que prepara Sebastián. 2. A Patricia las hamburguesas, las papas fritas y los refrescos. 3. A nosotras la comida nutritiva. 4. A ustedes las

    asked by Cierrah on April 18, 2011
  78. Science

    As temperature rises, solids generally become more soluble in water, but gases become less soluble. If a soft drink contains high concentrations of sugar and carbon dioxide, which of the following may be expected to happen if it is cooled down? A) Sugar

    asked by Lily on December 25, 2008
  79. mat 117/algebra

    2/(5w+10 )- 3/(2w-4) please show me how to work this problem. I assume this is some sort of combine the fractions, as there is nothing equal to the sentence above. factor out 1/((5w+10)(2w-4)) 1/((5w+10)(2w-4)) * ( 2*(2w-4) - 3(5w+10) ) do the

    asked by Diana on July 6, 2007
  80. mayh

    Four players are playing a game involving choosing positions on a grid of size 3×8. Each player chooses a random position on the grid, then all players reveal their choices and a token is placed on each of the positions. The probability that the tokens

    asked by Mathslover Please help on May 5, 2013
  81. chemistry

    As temperature rises, solids generally become more soluble in water, but gases become less soluble. If a soft drink contains high concentrations of sugar and carbon dioxide, which of the following may be expected to happen if it is cooled down? A) Sugar

    asked by Anonymous on July 28, 2009
  82. Physics

    In stars, nucleons (protons and neutrons) form nuclei of atoms via a series of fusion reactions. If for a particular fusion reaction more energy is given off than is required to make it proceed, does the final nucleus have a higher or lower rest mass than

    asked by Nat on May 9, 2009
  83. Spanish

    What do the following people like? Write the correct form of the verb gustar in each sentence. 1. A mí la cena que prepara Sebastián. 2. A Patricia las hamburguesas, las papas fritas y los refrescos. 3. A nosotras la comida nutritiva. 4. A ustedes las

    asked by Cierrah on April 18, 2011
  84. science

    As temperature rises, solids generally become more soluble in water, but gases become less soluble. If a soft drink contains high concentrations of sugar and carbon dioxide, which of the following may be expected to happen if it is cooled down? A) Sugar

    asked by Anonymous on July 28, 2009
  85. science

    As temperature rises, solids generally become more soluble in water, but gases become less soluble. If a soft drink contains high concentrations of sugar and carbon dioxide, which of the following may be expected to happen if it is cooled down?A) Sugar may

    asked by dashauna on July 10, 2009
  86. science

    as temperture rises solids become more soluble in water,but gases become less soluble.if a soft drink contains high concetrations of sugar and carbon dioxide which of the following may be expected to happen if it is cooled down?1-sugar amy precipitate

    asked by yaz on October 9, 2007
  87. science

    as temperature rises, solids generally become more soluble in water, but the gases become less soluble. If a soft drink contains high concentrations of sugar and carbon dioxide, which of the following may be expected to happen if it is cooled down? 1.sugar

    asked by barby on May 1, 2008
  88. science

    As temperature rises, solid generally become more soluble in water, but gases become less soluble. If soft drink contains high concentrations of sugar and carbon dioxide, which of the following may be expected to happen if it is cooled down? 1. Sugar may

    asked by Anonymous on September 28, 2008
  89. science

    as temperture rises solids become more soluble in water,but gases become more less soluble.if a soft drink contain high concentration of sugar and carbon dioxide which of the following may be expected to happe if it is cooled down? 1)sugar amy percipatate

    asked by jessica on October 9, 2007
  90. Physics Inertia!

    Rank from fastest to slowest. a)a solid ball rolling down a ramp without slipping b)a cylinder rolling down the same ramp without slipping. c)a block sliding down a firctionless ramp with the same height and slope. Select all that apply. The ball is

    asked by Kaitlyn on October 30, 2012
  91. Chemistry

    Aluminum oxide is formed by reaction of excess oxygen with aluminum. 4 Al(s) + 3 O2(g) -> 2 Al2O3(s) Calculate the mass of aluminum required to form 18.2 kg of aluminum oxide if the reaction has a percent yield of 83.4%.

    asked by Cj on October 2, 2014
  92. can u help me

    Which of the following statements is always true of similar polygons? (1 point) Corresponding angles of similar figures have the same measure. The lengths of corresponding sides form equivalent ratios. The lengths of corresponding sides have the same

    asked by tesj on January 17, 2013
  93. college

    the relationship between farenheit and celsius temp can be approximated by an equation of the form y=mx+b where x is degrees farenheit and y is degrees celsius. find the equation if the two ordered pairs that satify this equations are (50,10) and (86,30)

    asked by tonya on June 29, 2010
  94. chem

    A 4.91 g sample of aluminum completely reacts with oxygen to form 6.85 g of aluminum oxide. Use this data to calculate the mass percent composition of aluminum in aluminum oxide. i got 61.2% first and it was wrong. then i got 53.0% and it was wrong

    asked by hannah on November 11, 2010
  95. math

    Use the Laws of logarithms to rewrite the expression log(base 2)(11x(x-9)) in a form with no logarithm of a product, quotient or power. After rewriting we will have: log(base 2)A+log(base 2)x+log(base 2)f(x) What is A and what is f(x)?

    asked by Rachel on February 20, 2013
  96. goverment

    "Many forms of government have been tried, and will be tried in this world of sin and woe. No one pretends that democracy is perfect or all-wise. Indeed, it has been said that democracy is the worst form of government except all those other forms that have

    asked by jimm on March 26, 2015
  97. Delcambre High

    a trail mix recipe calls for 1/3 pound of mixed nuts, 4/15 pound of raisins and 2/5 pounds of granola. What is the ratio of raisins to mixed nuts in simplest form?

    asked by Tracy on June 4, 2014
  98. Help Please Math

    A principal of $2500 is invested,part at 8% per annum and the rest at 12% per annum. In a year, the 8% investment interest was doubled the 12% investment interest. How much invested at each rate? Express in the form Ax+By=C

    asked by Matt on March 15, 2013
  99. chem

    In the reaction of hydrogen peroxide with iron (II) ion in acidic solution to form iron (III) ion and water, the oxidizing agent is____. Is it hydrogen peroxide?

    asked by Blair on August 11, 2008
  100. Chemistry

    Aluminum sulfate reacts with calcium hydroxide (from lime) to form aluminum hydroxide and calcium sulfate. Write the balanced formula unit equation for the reaction.

    asked by Ana on September 28, 2014