I need help with all these questions

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.

Describe the 2 algebraic methods you can use to find the zeros of the function f(t)=-16t^2+400.

Joe has some money in his bank account he deposits 45$ write an expression that represents the amount of money in joe's account