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Math Help - Proportions help

  1. #1
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    Exclamation Proportions help

    1.) Each dosage of a medication contains 1.62 units of a certain ingredient. Find the number of doses that can be made from 57.13 units of the ingredient. set up a proportion and round to the nearest whole number.




    2.) a recent study showed that the average trip to the mall lasts 4.4 hrs, which is longer than a football game. how many hrs would be needed for 8 of these trips. set up the proportion and give answer according to the correct rules of sig figures.
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  2. #2
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    Quote Originally Posted by Peyton Sawyer View Post
    1.) Each dosage of a medication contains 1.62 units of a certain ingredient. Find the number of doses that can be made from 57.13 units of the ingredient. set up a proportion and round to the nearest whole number.

    To get the number of doses considering there is 53.13 units of the ingredient.., you need to divide this to the amount of units for each dosage which is 1.62.. After dividing you would get the number of doses that can be made from 57.13 units of the ingredient..
    57.13/ 1.62= # of dosage


    To get the proportion : 57.13 units: number of dosage
    to simplify this, divide the number of dosage by itself and divide the number of units to the number of dosage.. the answer would look like this:
    # of units : # of usage



    2.) a recent study showed that the average trip to the mall lasts 4.4 hrs, which is longer than a football game. how many hrs would be needed for 8 of these trips. set up the proportion and give answer according to the correct rules of sig figures.
    The proportion of this could be:
    1 trip: 4.4 hrs = 8 trips : x hrs
    To get the number of hrs. ,just multiply 4.4 to 8 . remember, the number of S.F. in the answer is the same as the number of S.F. in the input number that has the fewest.



    i hope it would give you an idea..

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