If 15% is $375, how much is 5%

Janet is mixing a 15% glucose solution with a 35% glucose solution. this mixture produces 35 liters of a 19% glucose solution. how many liters of the 15% solution is januet using in the mixture? a. 25 liters c. 28 liters b. 7 liters d. 10 liters

1mile equals approximately 1.6 kilometers. which best approximates the number of miles in 6 kilometers?

Could somebody me with this radical simplification?