SOLUTION: Ocean Salinity: The salinity (salt content) of the Atlantic Ocean averages 37 parts per thousand. If 64 ounces of water is collected and placed in the sun, how many ounces of pure

Algebra ->  Percentage-and-ratio-word-problems -> SOLUTION: Ocean Salinity: The salinity (salt content) of the Atlantic Ocean averages 37 parts per thousand. If 64 ounces of water is collected and placed in the sun, how many ounces of pure       Log On


   

Question 158203This question is from textbook intermediate Algebra for College Students
: Ocean Salinity: The salinity (salt content) of the Atlantic Ocean averages 37 parts per thousand. If 64 ounces of water is collected and placed in the sun, how many ounces of pure water would need to evaporate to raise the salinity to 45 parts per thousand? (Only pure water is evaporated; the salt is left behind.)
---I dont even know where to begin this one; I need to know how to setup the equation, what information is important, and the solution. This question is from textbook intermediate Algebra for College Students

Answer by checkley77(12844) About Me  (Show Source):
You can put this solution on YOUR website!
.37*64=.45(64-X)
23.68=28.8-.45X
.45X=28.8-23.68
.45X=5.12
X=5.12/.45
X=11.38 OZ OF WATER IS EVAPORATED.