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Math Help - help please

  1. #1
    Junior Member
    Joined
    Apr 2008
    Posts
    73

    Cool help please

    a person drove 310 kilometers in 4 hours. at this rate,how far will the person travel in 10 hours?



    a carton contains 946 milliliters of milk.how many liters of milk are contained in 10 cartons?


    if a basketball team won 59 games and lost 21 ,find the ratio of games won to the number of games played?



    mr.garcia, with a salary of $19,500 was given a 5.6 % raise.what is his salary after the raise?


    there are 43 grams of sulfuric acid in 500 grams of solution. find the percent of acid in the solution.


    18 3/4% covert into decimal and fraction.....
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  2. #2
    Member
    Joined
    Dec 2008
    Posts
    111

    rate = ratio = quotient

    Dear BeBeMala,

    a person drove 310 kilometers in 4 hours. at this rate,how far will the person travel in 10 hours?

    You can creat a ratio: 310km/4h = 77.5 km/h. This is the rate in "at this rate". That we can call quotient or motient rate or velocity or simply speed.
    This ratio says we drive 77.5km during 1 hours. How many kilometers can we drive in 10 hours? Of course 10*77.5 = 775 km.

    One more:
    1) step: find out the rate (rate = 77.5 km/h)
    2) step: use the rate in a new time (s = rate*time = 77.5 km/h * 10 h)

    a carton contains 946 milliliters of milk.how many liters of milk are contained in 10 cartons?

    1) step: rate = 946 ml/carton
    2) step: volume = rate * 10 carton = 946 ml/carton * 10 carton = 9460 ml

    if a basketball team won 59 games and lost 21 ,find the ratio of games won to the number of games played?

    ratio = winner games / all games = 59 / (59+21) = 59/80 = 0.7375


    The sign "%" means multiplying 0.01.
    For example: ratio = 5% = 5*0.01 = 0.05
    or
    ratio = 0.21 = 21*0.01 = 21%

    I hope I helped a little.
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