Amanda arranged 5 baskets of flowers. she finished at 4: 10pm it took her 20 mins to arrange each basket of flowers. at what time did amanda begin

You will need to figure out the total amount of time she spent arranging baskets (20 mins x 5 baskets = 100 mins).  You will then subtract this period of time from the beginning time.  So we will go back 1 hour and 40 minutes from 4:10 p.m.  This would put you starting the arrangements at 2:30 p.m.  Go back to 3:10 pm for the hour and 40 minutes before that is 2:30 pm.