Most popular questions and responses by nathalie
  1. Math word problem

    The admission fee at an amusement park is $ 1.50 for children and $ 4.00 for adults. On a certain day, 258 people entered the park, and the admission fees collected totaled $712 . How many children and how many adults were admitted? I tried doing it this

    asked on February 22, 2017
  2. chemistry

    calculate the pH of the solution when 25.0ml of 0.0920M HCL is titrated with 0.15ml, 23.0ml, 30.0ml of 0.10M NaOH

    asked on January 23, 2013
  3. History

    Who were the English Monarchs during the War of the Roses? And the Hundred Years War? During the wars of the roses, was it just Edward IV, Edward V, and Richard III? My teacher said there were four or five of them. And for the hundred years war was it just

    asked on May 17, 2008
  4. Chemistry

    Could someone please check my Chemistry homework? The molecular formula for cisplatin, a chemotherapy agent, is PtCl2(NH3)2 (The numbers are all supposed to be subscripts) 1. What is the molar mass of cisplatin? Ans: 300.06 g/mol 2. How many moles of

    asked on January 13, 2008
  5. Chemistry

    How many kilograms of aluminum can be extracted from 2.0 metric tons of the ore 'alumina' (Al2O3)?

    asked on January 13, 2008
  6. History

    I asked a question about the monarchs of England earlier, and I did my timeline. Except there are supposed to be 23, and I only have 22. I am not supposed to add the monarchs of the Hundred years War or the Wars of the Roses. Can someone please check to

    asked on May 17, 2008
  7. fau

    The mass of an electron is 9.11\times 10^{-31}~\rm kg. If the de Broglie wavelength for an electron in a hydrogen atom is 3.31\times 10^{-10}~\rm m, how fast is the electron moving relative to the speed of light? The speed of light is 3.00\times10^8 ~\rm

    asked on June 8, 2010
  8. statistics

    suppose 25% of the urban population is 18 years old or younger. five residents of that city are selected at random find the probability that at least two of the selected five persons are 18 years old or younger. please help me with this question !!!

    asked on May 22, 2012
  9. French

    I have to write a paragraph about driving and my car with a story about a driving experience. Unfortunately I forgot my book and I'm trying to come up with something on my own. My French isn't that good either. Could someone please help me with the words I

    asked on May 15, 2008
  10. math

    A concert promoter wants to give away 240 tickets to 3 radio stations. Which basic math fact can he use to find 240 image 3 using mental math?

    asked on February 6, 2014
  11. algebra 2

    find all the zeroes of: x^5-3x^4-24x^3-72x^2-25x+75=0 5x^5-20x^4-40x^3-16x^2-45x+180=0 -3x^5+3x^4+9x^3-7x^2+12x=12 x^3-x^2-13x-13=0 x^3+x^2=15x-15 Thank you for any help...I'm desperate please help :(

    asked on December 31, 2012
  12. geometry

    tan (?) = 3.5

    asked on July 13, 2013
  13. Thermodynamics

    400 g of water are emptied at 20 ° C in a vessel. The container is placed at Fire of a flame that gives it a certain amount of thermal energy of So that it takes 5 minutes for the water to reach a temperature of 90 ° C. If the vessel does not absorb

    asked on June 13, 2017
  14. mat advance analysis

    True or False: If a|b and a|(b + 1), then a = ±1. [NOTE: Use this Theorem 3: If a|b and a|c, then a|(bx+cy) for any integers x and y. PROOF: Since a|b, there is an integer u such that b = au. Since a|c, there is an integer v such that c = av.

    asked on October 14, 2016
  15. science

    What is the percent by mass solution made by dissolving 163g of table sugar cm 755g of water

    asked on June 25, 2014
  16. Debate

    Can someone give me some tips on how to do well in a debate and possibly win? I have an opening and closing statement, arguments for my topic, and arguments against the other topics. We are talking about the best alternative to using petroleum. My choice

    asked on May 22, 2008
  17. Math... Sort of

    How much would 10 cents be worth in 1906? (Like relative to how much it would be worth now)

    asked on January 16, 2008
  18. living environment help!

    what are 3 services which the fruit provides for the plant? Since this is not my area of expertise, I searched Google under the key words "fruit plant function" to get these possible sources:

    asked on April 12, 2007
  19. Mathematics

    I need help on this following question there are 45 choirs members going to the recital.Each van can carry 8 people.How many vans are needed?

    asked on September 16, 2013
  20. Organic Chemistry

    Thin Layer chromatography TLC experiment What does it mean when it says with to much sample the spots will tail

    asked on October 26, 2012
  21. Chem

    Aviation fuel is significantly more expensive per gallon than diesel fuel. Why then is aviation fuel still used in Planes?

    asked on October 15, 2010
  22. PHYSICS- Laws of Motion

    When the cathode is heated from the 6.3 V AC supply, electrons are emitted from its surface. These electrons fall on the grid (which is positive) and a current flows in the cathode/grid circuit. As electrons stream from the cathode toward the grid, they

    asked on January 13, 2010
  23. French

    What is the best way to say this? When one has a flat tire, it is necessary to put air in it. I have to translate this, and my best guess is Quand on a pneu à plat , il faut mettre de l'air dans ça That doesn't really look right me at the end. Could

    asked on May 19, 2008
  24. public health

    What are the purposes of public health surveillance? How are they implemented and utilized by communities, governmental agencies, and health care organizations or providers?

    asked on August 24, 2011
  25. natural science

    What are the structural zones within the Earth? How are they detected scientifically?

    asked on October 24, 2008
  26. historty

    who was lowell mill strikers

    asked on April 9, 2012
  27. French

    I hope this question isn't too broad but.. When do you not pronounce the final letter of a word when the next word begins with a vowel? I hope that makes sense. I know that you are never supposed to say the "T" in "et" when it comes before a vowel but

    asked on May 26, 2008
  28. galnds and their functions

    Why are aspirin and ibuprofen effective in treating headaches? Thank you for using the Jiskha Homework Help Forum. Aspirin and the NSAIDs inhibit cyclooxygenase, leading to a decrease in prostaglandin production; this reduces pain and also inflammation (in

    asked on January 31, 2007
  29. Math

    Gene ad jay has collection of marbles. If jay give gene 2 of his marbles they would have an equal number. But if gene give jay 2 marbles, jay have 2 times as many as gene. How many marblea does jay have?

    asked on August 19, 2016
  1. math


    posted on March 14, 2017
  2. Math word problem

    so 1.50(x)/4 + 4.00(y)/4 = 712/4 0.375(x) + (y) = 178 (x) + (y) = 258 --------------------------------- -0.625(x) + 0(y) = -80 x= -80/-0.625 x= 128 x + y = 258 128 + y = 258 y = 258 - 128 y = 130 x = 128 (number of children tickets) y = 130 (number of

    posted on February 22, 2017
  3. mat advance analysis

    thank you so much steve i get it. a|b, b=ae a|b+1, b+1=af substituting, ae+1=af 1=a(e-f), we conclude that a|b+1-b therefore a|1, a = ±1

    posted on October 14, 2016
  4. 3rd grade math

    849 750

    posted on August 30, 2016
  5. math

    So 1/6

    posted on February 8, 2016
  6. Math Help

    jon drove 843 miles and rick drove four times as many miles how many miles did rick driv

    posted on December 1, 2015
  7. Math


    posted on September 16, 2013
  8. Delay of Gratification

    i think the answer of the question is B

    posted on April 10, 2012
  9. geometry

    what kind of geometric figure is an angle bisector

    posted on September 15, 2011
  10. healthcare

    ok thanks that is like the sanitation stage of 1800,s how they practiced using different techniques to help clear diseases.

    posted on August 24, 2011
  11. History

    Oops, I guess coying and pasting doesn't work here. Here are the rest: 5. Henry II 6. Richard the lionheart 7. John 8. Henry III 9. Edward I Longshanks 10. Edward II 11. Edward III 12. Henry VII 13. Henry VIII 14. Edward VI 15. Mary I 16. Elizabeth I 17.

    posted on May 17, 2008
  12. Chemistry

    Ok thanks so much.

    posted on January 13, 2008
  13. Chemistry

    So.. my work wasn't right. Above your message?

    posted on January 13, 2008
  14. Chemistry

    Would you take the percentage of aluminum in the ore: 53.96/101.96 = 52.92 then take that much out of 2.0 metric tons or 2000 kg? So would it be 1058.40 kilograms?

    posted on January 13, 2008