Final answer:
Jackie would save $520 in one year if she decided to rent only 2 movies per week.
Step-by-step explanation:
To find out how much money Jackie would save in one year if she decided to rent only 2 movies per week, we can calculate the difference in cost between renting 4 movies and renting 2 movies.
Currently, Jackie rents 4 movies a week at a cost of $5 each. So, she spends 4 x $5 = $20 per week.
If she decides to rent only 2 movies per week, she would spend 2 x $5 = $10 per week. Therefore, the amount of money she would save in one year is 52 x ($20 - $10) = $520.