Final answer:
Sam will spend approximately 4.33 hours reading the entire 390-page novel.
Step-by-step explanation:
To find out how many hours Sam will spend reading the entire 390-page novel, we can set up a proportion. We know that Sam read 75 pages in 50 minutes. Let's use the variable 'x' to represent the number of hours Sam will spend reading the entire novel. We can set up the proportion:
75 pages / 50 minutes = 390 pages / x hours
Cross-multiplying, we get:
75x = 50 * 390
Dividing both sides by 75, we find:
x = (50 * 390) / 75
Calculating this, we get x ≈ 260, which means Sam will spend approximately 260 minutes reading the entire novel. To convert this to hours, we divide by 60:
x ≈ 260 / 60 = 4.33 hours
Therefore, Sam will spend approximately 4.33 hours (or 4 hours and 20 minutes) reading the entire 390-page novel.