Anyone understand this question? not me comma anyone !

The circumference of a circle is 5 pi cm. what is the area of the circle?

Express in the simplest form: (x^2+9x+14/x^2-49) / (3x+6/x^2+x-56)

Sketch the region enclosed by the given curves. decide whether to integrate with respect to x or y. draw a typical approximating rectangle and label its height and width. y= 5x, y=7x^2then find the area s of the region.