Someone help me plzzz

What is the factored form of the following expressions? d^2 – 13d + 36

Susan is paying $0.30 per $100 on her $483,000 home in homeowners insurance annually. if her annual homeowners insurance premium is divided into twelve equal monthly installments to be included on each of her monthly mortgage payments of $2,128.00, what is her total monthly payment?

Which is true regarding the graphed function f(x)?