Answer:
Overehad Rate $11.765
Step-by-step explanation:

Estimated manufacturing overhead cost $235,300
Estimated machine hours 20,000
Overehad Rate $11.765
This means for every hours the machine are working, 11.76 dollars of MOH are generated.
The question if for the predeterminated rate, all the actual data is irrelevant.
Remember : The overhead rate is done by the dividision of the cost over a cost driver, which generally is labor hours or cost or machine hours.