posted by PHYSICS HELP PLS .
A whale swims due east for a distance of 7.299x10^1 km, turns around and goes due west for 3.58x10^0 km, and finally turns around again and heads 2.64x10^1 km due east. What is the displacement (referenced to the East) of the whale, to 2 significant figures?
72.99 - 3.58 + 26.4 = _____
Add and round off to two sig. figs.