Please convert these! (Scientific Notation)

Factor the polynomial by its greatest common monomial factor.

If 3 3/4 lb. of candy costs 20.25 how much would 1lb. of candy cost

In stepmber, daniel and justin opened a business. during their first three months of business, their average monthly profit was $51. if during their first month, they lost $29, and during their second month, they gained $115, what was their profit or loss for their third plzzz i will give you 299 points