So, the area of a circle is a=pi r^2
so do that and get a=pi(4)
and since the circle touches the edge of the rectangle, the rectangle is 4 cm tall, so 4*8 is 32 and pi(4) is about 12.56, so 32-12.56 is 19.44, and I believe that is the answer. (19.4)
There would be 203,759 total registered doctors that year.
The band has sold 1,890,000 copies or 1.89 x 10^6
X=12 because 3 times 12 equals 36. if you divide by 3 on both sides you would be left with that