Final answer:
The inequality representing when an avocado is ripe and not yet bad after picking is 4 < d < 7, where 'd' represents the number of days after picking.
Step-by-step explanation:
The student is seeking to express the condition of an avocado being ripe and not yet bad in an inequality form. An avocado is ripe and good to eat 4 days after picking and it will go bad 7 days after picking. You cannot eat the avocado 7 days after picking, indicating that the avocado can be eaten only when the number of days after picking, represented by 'd', is between 4 and 6 days.
To write this as an inequality, where 'd' is the number of days after picking, the inequality representing when the avocado is good to eat would be:
4 < d < 7
This inequality shows that the avocado can be eaten when the number of days after picking is greater than 4 but less than 7.