Identify the value of K ( constant proportionality) for the tables

Which number line represents the solution set for the inequality -1/2x> 24?

Can someone, me with this. i really need with this

How many liters of peroxide should be added to 12 liters of an 8% peroxide solution so that the resulting solution contains 16% peroxide?   original added new amount of peroxide 0.96 liters x 0.96 + x amount of solution 12 liters x 12 + x 0.18 liter 1.14 liters 1.92 liters 2.10 liters