The answer is <span>A. Mostly urban population </span>
Area of rectangle: 15 x 7 = 105
area of semicircle: 1/2 (3.14r^2)
radius is half of diameter so it would be 7.5
1/2 (3.14(7.5)^2)
=1/2 (176.71)
=88.355
rounded is 88.4
First, you must get the r by itself.
=15
Now, multiply both sides by 3 to get the r completely by itself and get the answer.
r=45.