The water level is a number that indicates whether the level is above or below normal using positive or negative values. After a heavy storm, the water level of a stream is -2.8 feet. This level is 1/2 times 2.1 feet more than the previous water level. What was the previous water level?

Drag and drop a value into the box to correctly complete the statement:

A) -2.8 feet
B) -3.5 feet
C) 1.05 feet
D) -1.05 feet