Final answer:
Raul needs to rent a total of 16 bicycles and will have to pay an additional $5.
Step-by-step explanation:
Raul needs to rent a total of 16 bicycles.
Since Raul wants each friend to have the same bicycle, the total number of bicycles needed is equal to the number of friends plus one. In this case, Raul has 15 friends, so he needs to rent 15 + 1 = 16 bicycles.
Additionally, since Raul plans to pay an additional $5, the total cost of renting the bicycles will depend on the rental price per bicycle. If we assume the rental price per bicycle is $x, the total cost can be calculated as 16 * x + 5$.
Therefore, Raul needs to rent 16 bicycles in total.