EV (expected value)

In poker, EV (or expected value) is the amount of money a player is expected to win in a given situation, based on math.

EV=F($POT)+C(%WIN$WON)-C(%lose$lost)
%win/lose= equity
$won/lost= number of big blinds

You should bet 10bb on this flop, it will give you the highest EV (expected value)