What is the electric field at a position that is 1.6m east of a point charge of 7.2 x 10^-6c?

The electric field produced by a single point charge is given by:

where
k is the Coulomb's constant
q is the charge
r is the distance from the charge

In our problem, the charge is , while the distance is , therefore the intensity of the electric field at that distance is

and since the charge is positive, the electric field is directed away from the charge (so, eastwards)