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 1/2 ft. ft. An additional measurement shows that the river has risen 1 5/12 ft. 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.(1 point)

Question

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 1/2 ft. ft. An additional measurement shows that the river has risen 1 5/12 ft. 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.(1 point)

Answer 1

To find out how many more feet the river needs to rise to reach the major flood stage, we need to add the two measurements together and subtract the current flood stage from the major flood stage.

1 1/2 + 1 5/12 = 3/2 + 17/12 = (3/2) x (6/6) + (17/12) = 18/12 + 17/12 = 35/12

Now we subtract the current flood stage from the major flood stage:

13 - 9 = 4

Therefore, the river needs to rise an additional 35/12 feet to be at the major flood stage of 13 ft.