If the focal length of the lens is 80mm and the focal length factor is 1.25, what is the lowest shutter speed you should use if holding your camera by hand

What hardships and what caused financial struggles with rembrandt and how did affected his art.

The main subject of greek art during the classical period was?

Which artist is often considered the leader of the hudson river school and poignantly set up contrast between the cultivated east and the wild west in the united states?