East Coast of the USA to West Coast of Africa...piece of Cake.
A little over 8 hours...easy. Buy Economy Comfort if you want a little more leg room. Otherwise, pop a sleeping pill and you'll be there after watching a few movies, a few snacks, and a few drinks.
I have made 16 trips to/from the middle east, 14-16 hours each way, all in coach on Delta.
Use some of that big baller money and get yourself an upgrade to business.
Seriously...I would be more concerned with the doxycycline that you will be taking on a daily basis once over there. Its a horrible drug, but necessary.