Ihave two questions i need with. 1. if earth's mass is 20% higher, how long would it take earth's orbital period around the sun? (in days/years ) 3. if the earth was 20 million years farther from the sun, how will our year length change?

1).  The Earth would need much much much much much more mass than it has in order to see any change in our orbital period around the sun.  An increase of 20% won't jhave any effect.

3). This question isn't clear. "years" isn't a unit of length or distance. It can't describe a change in our distance from the sun, so we don't know what this question is actually asking.