Mabel spends 4 hours editing a 3 minute video. she edits at a constant rate. how long does mabel spend to edit a 9 minute video?
she spends 4 hours on a 3 minute video so there are 60 minutes in an hour 4 hours with 60 minutes- 4x60=240 so she spent 240 minutes on a 3 minute video 3 divided by 240 3/240= 0.0125 so her constant rate is 0.0125 minutes an hour so divide 9 minutes by her constant rate 9/0.0125 = 720 so she spends 720 minutes on a 9 minute video. divide 720 by 60 since there are 60 minutes in an hour 720/60 = 12 so she spends 12 hours on a 9minute video
