Achemical company makes two brands of antifreeze. the first brand is 35% anti freeze, and the second brand is 85% pure antifreeze. in order to obtain 150 gallons of a mixture that contains 75% pure antifreeze, how many gallons of each brand of antifreeze must be used.

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she will sew have sewn five dresses   and be 1/3 done with the sixth one in an hour.

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3/4 of an hour=45 mins

lucy makes 1 dress per 11.25 minutes

45 mins+11.25 mins=56.25 mins

60 mins- 56.25 mins=3.75 mins

3.75 mins is 1/3 of of 11.25 mins

therefore she the other 1/3 would be part of the hour and she will have sewn 5 dresses and begun the sixth.

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