Answer: Not sure, but I guess it's 85 feet squared.
Step-by-step explanation: It said what are the dimensions if the poster is enlarged by a factor of five over two so add 5 to the 12 feet in which you will get 17 feet. Also add 2 to the 3 feet which would be 5 feet. Then multiply 17 feet by 5 feet which in this case would be 85 feet squared. Again I may be wrong so check to make sure it make sense.