In an attempt to escape his island, Gilligan builds a raft and sets to sea. The wind shifts a great deal during the day, and he is blown along the following straight lines. 2.5 km 45° north of west; then
4.70 km 60° south of east; then
5.1 km straight east; then
7.2 km 55° south of west; and finally
2.8 km 5° north of east.

2.58 rounded to 1 significant figure is 3. 2.3 rounded to one significant figure is 2 and 10^-2 is 0.01, which is the same if you round it to one significant figure. This is because when the first number that ISN'T a 0, you round it either up or down to 1 significant figure, and in this case, it is 0.01.

5.68 rounded to one significant figure is 6. 10 to the power of three is 1000, and 1000 doesn't need to be rounded to one significant figure. 3 x 0.01 is 0.03, and 2 x 1000 is 2000. 2000 x 0.03 is 60. 6 x 1000 is 6000. then you divide 60 by 6000, which is 0.01.

Explanation:

hope this helps you.