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 1 1/12ft. ft. An additional measurement shows that the river has risen 1 5/12ft. 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.

Answer 1

The total rise in the river so far is 1 1/12ft + 1 5/12ft = 2 2/12ft + 1 10/12ft = 3 12/12ft = 3ft.
The river needs to rise 13ft - 3ft = 10ft more. Answer: \boxed{10}.