Please help i'm struggling with this!It's urgent!

What is the best approximation for the area of a circle with a radius of 4 m ? use 3.14 to approximate pi

What is the ordered pair of m’ after point m (5, 6) is rotated 90° counterclockwise?

Answer asap! show all work! find the number of complex roots, the possible number of real roots and the possible rational roots of the polynomial function. then, solve for all roots. x^3 + 2x^2 + 3x + 6 = 0