Asample has a mass of 15g and a volume of 3ml calculate the density

Abanner is made of a square and a semicircle. the square has side lengths of 24 inches. one side of the square is also the diameter of the semicircle. what is the total area of the banner? use 3.14 for π.

Any is very appreciated! (picture is provided below)not sure how to do this at all won't lie

The table represents a function. what is f(-2)? a.-3 b. -1 c.1 d.3