Gearing down a motor for linear motion?

I have a linear actuator whose motor is currently operating at 8000 RPMs. The gear ratio is 9.5:1. Question 1: How would I determine how fast the linear actuator is moving? I know that v=wxr but how does the gear ratio play into this?
http://cad.actuator.com/configurator/85915-85916-linear-actuator?

Question 2: if I wanted to bring the linear velocity down to .1mm/s, what gear ratio would I need for that box and do you have any suggestions on gearbox suppliers?

Thanks