andyboehm7411
20.10.2019 •
Mathematics
Asolution contains6% salt. how much water should be added to 70 ounces of this solution to make a 4.2% solution?
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Ответ:
4.9 = .049x + 3.43
4.9 - 3.43 = .049x
1.47 = .049x
x = 1.47/.049
x = 30 oz of water added to the 70 oz
Ответ:
4.2=4.2% in how much total
4.2=4.2% of total
4.2=0.042 times total
divide both sides by 0.042
100 =total
70+what=100
what=30
30 oz of water must be added
Ответ:
If the post is 12ft high and the shadow is 15ft. The tree is 3ft less than the shadow.
Hope this helps!