amymanrara amymanrara 02-08-2022 Mathematics contestada Susan drove 4 hours. Her average speed was 60 mph. Finish the chart below to give her an average speed of 60 mph. ║hour ║ speed║ ______________ ║1st ║ 65 ║ ║2nd ║ 70 ║ ║3rd ║ ____ ║ ║4th ║ 55 ║