2. Fibonacci patterns on a pinecone or pineapple are found in the number of spirals. The number of bracts on a pinecone or the number of bracts going up is not necessarily a Fibonacci number, but almost always the number of spirals is a Fibonacci number.

Practice counting spirals on this picture:

This picture is borrowed from the main web site we have looked at, and the answer to how to count spirals, and how many there are is on that web site here

3. I would like specificity here:

5 is the number of petals on Richard's flower, or a pansy, or the fingers on your hand

8 is the number of petals on a bloodroot, or the legs on a spider

13 is the number of petals on a black-eyed susan.

5, 8 and 13 can all be found as the number of spirals on a pineapple or a pine cone (but you need to tell me spirals, not just pinecone)

4. Fibonacci wrote about the arabic number system and how to use it to calculate (add subtract, etc), and how to use it in the sorts of applications merchants would be interested in.