Final answer:
Nora will take about 2 nights to finish reading the book.
Step-by-step explanation:
To find out how many nights it will take Nora to finish reading, we need to calculate 25% of the remaining pages each night.
Given that Lauren has already read 70 pages and there are 26 pages remaining, Nora will be starting with a total of 96 pages.
Every night, Nora will read 25% of the remaining pages, which means she will read 25% of 96 pages, or 0.25 * 96 = 24 pages.
Since there are 26 pages remaining, it will take Nora approximately 26 / 24 = 1.08 nights to finish reading the book. Therefore, it will take her about 2 nights to finish reading the book.