Final answer:
The algebraic expression to represent the situation is A = 16 + 8C, where A represents the total cost for adults and C represents the number of children.
Step-by-step explanation:
The algebraic expression that represents the situation is:
A = 16 + 8C
Where:
- A represents the total cost for adults
- C represents the number of children
In this expression, $16 is added to the product of $8 and the number of children attending the field trip.