Final answer:
The straws will last Mia 25 weeks if she uses 20 straws each week.
Step-by-step explanation:
To find out how many weeks the straws will last, we need to divide the total number of straws by the number of straws used each week.
Given that Mia bought a box containing 500 straws and she uses 20 straws each week, we can divide 500 by 20:
500 ÷ 20 = 25 weeks
Therefore, the straws will last Mia 25 weeks if she uses 20 straws each week.
Learn more about Straws and weeks