He made 12*40=480 dollars in total. 0.0765*480=36.72 dollars were withheld.
To find the area of the circle, you will use the formula for finding area of any circle.
The radius is half the diameter.
A = pi x r^2
3.14 x 13^2
A = 530.66 square units
The area is 530.66 square units.
