The correct answer is A. Longing I know because I just finished the quiz.
From what I learnt so far, there are 3 possible ways of finding whether ratios form a proportion
3. .5*60 because .5 represents the 5% and "of" stands for multiplication
Well first set up the first ratio as 6/24. That is commercial mins over show time mins. Then to keep the units the same convert 2 hours into minutes which would be 120 minutes. Then set up your next ratio as x/120 since you’re trying to find the commercial minutes. Then cross multiply so that it’s 24x=720 and then x=30 and that’s the amount of commercial minutes for 2 hours.