Divide the number of batteries by the amount of packs. 40/10=4. therefore each pack has 4 batteries. a bundle of 5 packs would be 20 batteries. 1x4= 4 same as 1 pack. 4x5= 20 same as 5 packs.
The underlined word <em>and </em>is a conjunction. Conjunctions are used to connect words and sentences, and in this case, <em>and </em>connects <em>unicyclists and bicyclists. </em>