So like i need help pls

Draw the structure for 5-isopropyl-2-methyl-3-nonene

13. a covalent bond between two atoms is likely to be polar if: a. one of the atoms is much more electronegative than the other. b. the two atoms are equally electronegative. c. the two atoms are of the same element. d. the bond is part of a tetrahedrally shaped molecule. e. one atom is an anion.

What causes most sediment to wash or fall into a river