Step-by-step explanation:
which subject it is????????....
Let 
be the number of liters of the 10% solution to be used, and 
the number of liters of the 4% solution. The chemist wants to end up with a 4 liter solution, so
For each liter used in the mixture, a concentration of either 10% or 4% acid will be contributed, and the goal is to make a 4L solution whose concentration is 7%, which means
Solving for 
gives 
, so 2L of both solutions is needed.
29/3=9.66
9.66^2=93.31
But 93.31>83
Therefore the student was wrong
Answer:
214 Liters converted to gallons would be 56.53 gallons there are more decimals after but those are the two main decimals.
Step-by-step explanation:
