Each medal is different and is handed out depending on the outcome of the race/order of the racers, so we're counting the number of permutations. 4 medals are given to 4 runners, so there are

possible ways to do it.
Answer: 
Step-by-step explanation:

Answer:
The final balance is $851.11.
The total compound interest is $251.11.
Step-by-step explanation:
Answer:
8x-y+4=0
Step-by-step explanation:
because 8x-y+4=-4+4