The problem is to find the unit rate for each of the given scenarios. We need to calculate the rate in the specified units.

1. Problem Description

The problem is to find the unit rate for each of the given scenarios. We need to calculate the rate in the specified units.

2. Solution Steps

1) 35 books in 5 boxes: books per box = $35/5 = 7$

2) 100 miles in 4 hours: miles per hour = $100/4 = 25$

3) 9 songs in 36 minutes: minutes per song = $36/9 = 4$

4) 5 episodes in 200 minutes: minutes per episode = $200/5 = 40$

5) 72 pens in 9 packs: pens per pack = $72/9 = 8$

6) 6 miles in 42 minutes: minutes per mile = $42/6 = 7$

7) 4 boxes weigh 48 kilograms: kg per box = $48/4 = 12$

8) 120 books on 6 bookshelves: books per bookshelf = $120/6 = 20$

9) 64 biscuits in 4 packs: biscuits per pack = $64/4 = 16$

10) 200 miles in 5 hours: miles per hour = $200/5 = 40$

11) 240 students in 8 classes: students per class = $240/8 = 30$

12) 84 eggs in 7 boxes: eggs per box = $84/7 = 12$

13) 160 pieces in 5 chess sets: pieces per chess set = $160/5 = 32$

14) 80 apartments on 4 floors: apartments per floor = $80/4 = 20$

15) 36 books in 72 weeks: weeks per book = $72/36 = 2$

16) 54 cupcakes on 6 trays: cupcakes per tray = $54/6 = 9$

17) 120 olives on 8 pizzas: olives per pizza = $120/8 = 15$

18) 96 pineapple rings in 8 tins: pineapple rings per tin = $96/8 = 12$

3. Final Answer

1) 7

2) 25

3) 4

4) 40

5) 8

6) 7

7) 12

8) 20

9) 16

10) 40

11) 30

12) 12

13) 32

14) 20

15) 2

16) 9

17) 15

18) 12