Magnetic Flux Practice Test

The magnetic field perpendicular to the plane of a $$4.0$$ cm by $$4.0$$ cm square loop of wire is given by $$B(t) = 3.0t - 1.5t^2$$, where $$B$$ is in tesla and $$t$$ is in seconds. What is the magnitude of the magnetic flux through the loop at $$t=2.0$$ s?

A square coil with $$N$$ turns and side length $$s$$ is in a uniform magnetic field $$B$$. The axis of the coil (normal to its plane) is initially parallel to the field. The coil is rotated by $$90^\circ$$ so its axis is perpendicular to the field. What is the magnitude of the magnetic flux through the entire coil in this final position?