Final answer:
To estimate the total hours Zia read, we round 7(13)/(20) to 8 hours and 6(7)/(12) to 7 hours, which sums up to approximately 15 hours over two weeks.
Step-by-step explanation:
Zia read her book for 7(13)/(20) hours last week. This week, she read for 6(7)/(12) hours. To estimate the total number of hours Zia read her book in the last two weeks, we simplified the mixed numbers to their nearest whole numbers and added them together. The number 7(13)/(20) can be rounded to 8 hours (since 13/20 is close to a whole), and 6(7)/(12) can be rounded to 7 hours (since 7/12 is more than half). Adding them together gives us:
Estimated total reading time = 8 hours + 7 hours = 15 hours.
Therefore, Zia read approximately 15 hours over the two weeks.