Are there 3 scientific figures in 382.90

Anybody wanna ? (picture included? )

Under the action of a constant force an object accelerates at 7.8 m/s2. what will the acceleration be if (a) the force is halved? (b) the object's mass is halved? (c) the force and the object's mass are both halved? (d) the force is halved and the object's mass is doubled?

What happens when a rubber rod is rubbed with a piece of fur?