For number three you'll divide 60 by each person's seconds. Like this.
For Camille you will do this 60 ÷ 6 = 10 For Ariel you will do this 60 ÷ 2 = 30 Next you'll multiple what you got by their distance. Like this. For Camille you will do this 10 × 16 = 160 For Ariel you'll do this 30 × 6 = 180 Next you'll subtract those two answers. Like this. 180 - 160 = 20 Your answer is Ariel's frog was faster and it was ahead by 20 centimeters.
If there are 70 chairs but only 20 rows then that means he will have to set up 3.5 chairs per row, or Brook could set up 14 rows with 5 chairs in each row.
Srry if that didn't help but that's what i got from that.
