In the standard (x, y) coordinate plane, the center of the circle shown below lies on the x-axis at x = 4. If the
circle is tangent to the y-axis, which of the following is
an equation of the circle?

The numbers on a football field indicate 10 yard increments. you walk around the perimeter of a football field between the pylons. you walk a distance of 30623 yards. find the area and perimeter of the indicated regions. write your answers as mixed numbers, if necessary. a. one end zone: perimeter: yd area: yd2 b. the playing field (not including end zones): perimeter: yd area: yd2 c. the playing field (including end zones): perimeter: yd area: yd2