SAT Subject Test Mathematics Level 1

The coordinates of  point   P   are the legs    of  the right   triangle    of  hypotenuse

5:

So  x^2     +   y^2     =   5^2 .   Furthermore,    y   =   2x, so

44 . B

The radius  of  circle  O   is  4,  so  the area    of  circle  O   is  π(4)^2  =   16π.    The radius

of  circle  P   is  2,  so  the area    of  circle  P   is  π(2)^2  =   4π. Think   of  the shaded

region  as  the difference  between a   quarter of  circle  O   and a   half    of  circle

P: