Question 762209
You have to convert pounds to drops
In terms of units:
( pounds ) x ( ounces / pound ) x ( teaspoons / ounces ) x (  drops / teaspoon )
If you do all the cancellations, you end up with ( drops )
Plugging in numbers:
{{{ ( 1 )*( 16/1 )*( 6/1 )*( 60/1 ) = 5760 }}}
There are 5,760 props in a pound
( number of bacteria / pound ) x ( pounds / drop ) = ( number of bacteria / drop ) 
{{{ 5.5*10^11 * ( 1 / 5760 ) = 55000*10^7 / 5760 }}}
{{{ 55000*10^7 / 5760 = 9.5486111*10^7 }}}
There are 95,486,111 bacteria in a drop of mud