Express 9.39 x 109 seconds in terms of days.

In 1 day there are 24 hours x 60 min/hour x 60 seconds/min = 86 400 seconds

So divide 9.39 x 10^9 by 86 400 to determine the # of days there are

= (9.39 x 10^9) : (8.64 x 10^4)

= (9.39 : 8.64) x (10^9 : 10^4)

= 1.0868055556 x 10^5

= 108 681 (nearest whole day)