Can someone explain the differences between a rational and irrational number, and a interger

The late fee for library books is $2.00 plus 15¢ each day for a book that is late. if maria’s fee for a late book was $3.20, write and solve a linear equation to find how many days late the book was.

Acoin bank containing only dimes and quarters has 12 more dimes than quarters. the total value of the coins is $11. how many quarters and dimes are in the coin bank?

Aflower has 26 chromosomes. to create a new flower,how many would a sperm cell have what is called?