5. A lab technician needs 25 liters of a solution that is 15% acid for a certain experiment, but she only has a solution that is 10% acid and a solution that is 30% acid. How many liters of the 10% and the 30% solutions should she mix to get what she needs?​

12. the amount of money in a bank account decreased by 21.5% over the last year. if the amount of money at the beginning of the year is represented by ‘n', write 3 equivalent expressions to represent the amount of money in the bank account after the decrease?

If sec theta = 5/3 and the terminal point determined by theta is in quadrant 4, then

Evaluate 8j -k+148j−k+14 when j=0.25j=0.25 and k=1k=1.