In which direction does the head of the molecules of the plasma membrane face? toward the middle

away from water

toward the outside

toward the head of another molecule

Sorry i dont understand the question can you rephase it?

V=s/t  4.5 = 5000+15000+20000+5000t=45000/4.5t=10000sto convert divide by 360answer is 3 hours

Six base units were recommended: the metre, kilogram,second, ampere, degree kelvin (later renamed kelvin), and candela. in 1960, the 11th  cgpm  named the system the international system of units, abbreviated si from the french name, le système international  d'unités.