Please help me I don't really understand

What is the perimeter of a rectangular building that is 80 feet wide and 140 feet deep?

Find the center and the radius of the circle with the equation: x^2-2x+y^2+4y+1=0?

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?