The answer is the factory makes 348 quarts of ice cream in 12 hours.
To solve, first your want to divide 290 by ten. You do this to find the number of quarts the factory makes in an hour. We learn that the factory makes 29 quarts in one hour because 290/10=29. Next you want to multiple 29 and 12. You do this to find out how many quarts are made in in twelve hours. So, the factory makes 348 quarts of ice cream in twelve hours.
Hope this helps :)