Final answer:
The equation that describes the situation of Sharon reading a 300-page book at a rate of 15 pages per day in d days is 15 × d = 300.
Step-by-step explanation:
Sharon read a 300-page book at a rate of 15 pages per day over a period of d days. To write an equation to describe this situation, we can set up an equation where the total number of pages read, which is 300, is equal to the number of pages read per day multiplied by the total number of days.
The equation can be written as:
15 × d = 300
This equation represents the total number of pages Sharon read (300) as the product of the number of pages she reads daily (15) and the number of days she takes to read the book (d).