Final answer:
To determine the total number of flags, multiply 15 countries by 3 flags per country, which equals 45 flags. Option b) 45 flags is the correct answer.
Step-by-step explanation:
The question involves a simple multiplication problem where you are asked to find out how many flags were flown in total at a Hispanic heritage festival. Specifically, the problem mentions that there were flags for 15 countries and each country had three flags on display.
To solve the problem, you multiply the number of countries by the number of flags per country:
Number of countries × Number of flags per country = Total number of flags
15 countries × 3 flags per country = 45 flags
Thus, the total number of flags flown at the festival is 45, which corresponds to option b) 45 flags.