The Brandywine River is at its flood stage of 9 ft. It’s continuing to rain. The next measurement shows that the river has risen 1112ft. ft. An additional measurement shows that the river has risen 1512ft. ft. How many more feet does the river need to rise to be at the major flood stage of 13 ft.? Express your answer in simplest form.
To find the additional feet the river needs to rise to be at the major flood stage, we subtract the current height of the river (11ft) from the major flood stage height (13ft).
13ft - 11ft = <<13-11=2>>2ft.
Therefore, the river needs to rise an additional 2 feet to reach the major flood stage. Answer: \boxed{2}.