A thermally activated process (a reaction) takes four minutes at 816oC. How long will it take (in minutes) at 707oC if the activation energy is 150 kJ/mol?

Question

A thermally activated process (a reaction) takes four minutes at 816oC. How long will it take (in minutes) at 707oC if the activation energy is 150 kJ/mol?
What is the % ionicity of the bond B_I&B_F?