How to hook my iphone into radio?

I know how to plug into my car radio I just use an aux cord. But there's a radio at work I want to plug it into and can't figure out how to, I tried an aux cord but wouldn't work. What are the possibilities and different cords I could try? I honestly can't remember what kind of radio it is and what all it said on it

Added (1). to play music on.

Is the iphone 7 32 GB enough?

I have a budget and I want about 7 apps and to take many pictures and with the updates is it enough? Or is it not worth it

Is my iphone 6 still reparable?

I was on a boat earlier and I was helping my dad push it one way on the trailer while it was still in the trailer, it was uneven and I went about waist deep in the water and forgot my phone was in my pocket after I got out and it wouldn't turn on. I shook it and tried charging and I hair dried 30 min ago. It happened about 4 hours ago. Its in rice right now. Will it be okay. I got it 2 years next month

Added (1). I ended up getting a new phone but thank you for the tips who ever answered