Answer:
600 items
Explanation:
Asked: How many items do 8 machines produce in 45 minutes?
Method:
Since one machine produces 100 items in one hour, it produces 50 items in 30 minutes (half an hour). Therefore, in 45 minutes, one machine can produce:

Since we have 8 machines, the total number of items produced in 45 minutes is:

Answer: The 8 machines can produce 600 items in 45 minutes.