a worker in a factory earns $10 an hour. The worker works 10 hours a day for 10 days straight before a vacation. How much money did the worker earn before going on vacation
The worker earns $10 per hour, and works 10 hours a day for 10 days straight.
Therefore, the worker earns $10 x 10 = $<<10*10=100>>100 per day.
Before going on vacation, the worker earns $100 x 10 = $<<100*10=1000>>1000.
The worker earned $1000 before going on vacation. Answer: \boxed{1000}.