The hour hand moves 1/12 x 360° in every hour = 30° every hour or 30/3600 = 1/120° every second.....at 4AM it had advanced 120° since midnight.
But, since 7 minutes and 19 seconds = 439 seconds....it has advanced an additional 439/120 = 3.6583° since 4AM .....so it has advanced 123.8583° since midnight
The minute hand advances 360° every hour = 6° every minute. So, in 7 minutes it has advanced 42° since the top of the hour plus another 19/60 x 6° = 1.9°....so it has advanced 43.9° since 4AM
So...the angle between the hands is [ 123.8583 - 43.9 ]° = about 79.7583° {I assume you might want the negative of this iif we're measuring clockwise ???}
