Final answer:
After taking 5 pictures with each picture taken every 4 feet, Aidan's elevation would have changed by 20 feet relative to the surface of the water.
Step-by-step explanation:
The student's question pertains to how Aidan's elevation changes relative to the surface of the water after he takes 5 pictures. Since Aidan takes a picture every 4 feet he dives, we can calculate the total depth by multiplying the distance he dives between pictures by the number of pictures he has taken. Thus, after 5 pictures, Aidan's elevation would have changed by:
4 feet/picture × 5 pictures = 20 feet
Therefore, Aidan's elevation relative to the surface of the water would have changed by 20 feet after he has taken 5 pictures during his vacation dive.