Answer: 30 sq ft
Explanation:
Let's calculate the area of both rooms.
John's room is 12x8 ft, so we can multiply to get the area. 12x8=96 ft squared.
Spencer's room is 14x9 ft, so we will do the same thing. 14x9= 126 ft squared.
Now, we can subtract 96 from 126 to find out how much larger Spencer's room is. 126-96= 30 ft squared.
hope this helped!