Could I have help with these 3 physics problems

Some bacteria are propelled by motors that spin hair-like flagella. A typical bacterial motor turning at a constant angular velocity has a radius of 1.3 x10m, and a tangential speed at the rim of 2.8 x10- m/s. (a) What is the angular speed (the magnitude of the angular velocity) of this bacterial motor? (b) How long does it take the motor to make one revolution?An electric fan is running on HIGH. After the LOW button is pressed, the angular speed of the fan decreases to 80.5 rad/s in 2.30s. The magnitude of the angular deceleration is 47.1 rad/s. Determine the initial angular speed of the fan.A 240-kg speedboat is negotiating a circular turn (radius = 29 m) around a buoy. During the turn, the engine causes a net tangential force of magnitude 720 N to be applied to the boat. The initial tangential speed of the boat going into the turn is 6.2 m/s. (a) Find the tangential acceleration. (b) After the boat is 2.5 s into the turn, find the centripetal acceleration