Final answer:
To determine the value of isteenager, check if kidage falls within the range of 13 to 19 (inclusive) or not.
Step-by-step explanation:
In order to determine the value of isteenager, you need to check if the value of kidage falls within the range of 13 to 19 (inclusive) or not.
You can use an if statement to do this. Here's an example in Python:
if 13 <= kidage <= 19:
isteenager = True
else:
isteenager = False
This code checks if kidage is greater than or equal to 13 and less than or equal to 19. If it is, isteenager is assigned the value True. Otherwise, it is assigned the value False.