how long will it take radio signals to go from mars to earth ?

Question: how long will it take radio signals to go from mars to earth ?
- Keywords:
  earth,
  mars,
  radio
Asked by Ami_awesome to Chris on 18 Mar 2016.
- Chris Conselice answered on 18 Mar 2016:
  
  On average it is about 12.5 minutes, but because the earth and mars have different orbits and therefore can be on opposite sides of the sun or close together, this time can vary between a few minutes and 25 minutes.

Question: how long will it take radio signals to go from mars to earth ?