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23jazzy
27.09.2019 •
Mathematics
Alab technician needs to combine 30% alcohol solution with 35% alcohol solution to make 5l of 33% alcohol solution . how many luters of the 30% solutio and of the 35% solution will be used
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Ответ:
Overall Material Balance: x + y = 5
Component Balance: 0.30x + 0.35y = 5 x 0.33
Solving simultaneously for the values of the variables gives x = 2 and y = 3.
Thus, the technician needs 2L of 30% alcohol and 3L of 35% alcohol.
Ответ:
If Jack borrowed $200 and ended up paying $226 at the end, his interest rate is about $1.08.
To get this answer, we would have to divide. His interest was probably paid monthly, therefore we´ll be dividing by 24 (two years).
Furthermore...
26 ÷ 24 = 1.08 per month.