There is a rectangle of length 2.60 cm and width 4.80 cm in the xy-plane. If the electric field can be expressed by (28.0i^ +235 k^) N/C, what is the flux through the rectangle?
The rectangle is in the xy plane so the only part of the electric field that matters is 235 in the k direction (perpendicular to the rectangle)
so
area of rectangle * 235
area in meters^2 so 0.026 * 0.048