Question

round 752305 to 2 significant figures

Answer 1

750000
Only the first two digits give you a value and are of significance.

Answer 2

Do you understand?

Answer 3

Since there are 6 sig figs in the number 752305, and you want to round down to 2 sig figs, you have to erase the last 4 numbers and round them down (or up) to zeros. So, in this case, you would have to round down to 750000