ANSWER

Explanation:
Given information
The tortoise travels three-fifths of the remaining distance to the ocean
The initial distance of tortoise from the ocean = 1000 ft
Step 1: Determine the remaining distance at the end of each day
Let x represents the remaining distance at the end of each day

Hence, the remaining distance at the end of each day is two-fifths (2/5)
So, the function can be modeled by an exponential with a growth factor of 2/5
Hence, the modeled equation can be written below as
