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45+7.673+2+70394=? help
answered
Feb 21, 2018
Mathematics
middle-school
1
vote
178k
views
Brine is a solution of salt and water. If a tub contains 70 pounds of a 5% solution of brine, how much water (to the nearest tenth lb.) must evaporate to change it to an 7.5% solution?
answered
Feb 16, 2018
Mathematics
high-school
3
votes
223k
views
The ordinary light microscope is called a bright-field microscope because _____.
answered
Aug 3, 2017
Biology
high-school
3
votes
210k
views
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