I need some help with this question..

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

You can find the constant of proportionality by finding the ratio of

The trigonometric ratios sine and secant are reciprocals of each other