Final answer:
The pile initially had 42 logs, and after Mark added 16 more logs, the total number of logs on the pile became 58.
Step-by-step explanation:
The question requires us to calculate the total number of logs in the pile after Mark added more logs to the existing pile. Initially, there were 42 logs in the pile. Mark added 16 more logs to the pile. To find the new total, we simply add the number of logs Mark put on the pile to the original amount.
Original number of logs = 42
Additional logs added by Mark = 16
Total logs after adding = Original number + Additional logs
Total logs after adding = 42 + 16
Total logs after adding = 58 logs
Therefore, there are now 58 logs on the pile.