It depends on the scale you choose for your axes.
If the major grid lines are at single integers (1, 2, 3...) then 0.4 would be 4 tenths of the way from the origin to the No.1 grid-line.
If though you made every tenth grid-line = 1 then 0.4 would be the 4th grid-line.
4 divided by 10 is .04
0.0303
To convert .04 of an hour to minutes, you would multiply .04 by 60 (since there are 60 minutes in an hour). This calculation would result in 2.4 minutes. Therefore, .04 of an hour is equivalent to 2.4 minutes.
The date 04-13-68 would be IV.XIII.LXVIII and 04-13-1968 would be IV.XIII.MCMLXVIII
The series of numbers 4.02.05 written as Roman numerals would be IV.II.V If they represent a date then the full date would be either 04-02-2005, which would be IV.II.MMV or if the date was 04-02-1905 it would be IV.II.MCMV
The Early Show - 1999 2008-04-04 was released on: USA: 4 April 2008
Attack of the Show - 2005 2011-04-04 was released on: USA: 4 April 2011
Attack of the Show - 2005 2008-04-04 was released on: USA: 4 April 2008
The Early Show - 1999 2011-04-04 was released on: USA: 4 April 2011
The Alyona Show - 2009 2011-04-04 was released on: USA: 4 April 2011
The Early Show - 1999 2006-04-04 was released on: USA: 4 April 2006
The Early Show - 1999 - 2011-04-04 was released on: USA: 4 April 2011
The Oprah Winfrey Show - 1986 2005-04-04 is rated/received certificates of: Australia:PG
The Jerry Springer Show - 1991 2012-04-04 was released on: USA: 4 April 2012
The Wendy Williams Show - 2008 2012-04-04 was released on: USA: 4 April 2012
The Charlie Rose Show - 1991 2006-04-04 was released on: USA: 4 April 2006
The Howard Stern Show - 1990 1992-04-04 was released on: USA: 4 April 1992