Final answer:
You need a total of 10 batteries to power 5 remote controls since each uses two batteries. However, a pack of 8 batteries is not enough, so you would need to acquire at least two additional batteries.
Step-by-step explanation:
The subject of the question is whether 5 remote controls can all be powered by one pack of 8 batteries when each remote requires two batteries. Since each remote control needs two batteries to operate, we can calculate the total number of batteries needed by multiplying the number of remote controls by two. Therefore, 5 remote controls need 5 x 2 = 10 batteries.
Given that one pack contains only 8 batteries, we can conclude that there are not enough batteries in a single pack to power all 5 remote controls, as 10 batteries are needed but only 8 are available. Thus, you would need at least two more batteries to have a full set for all remote controls.