Step-by-step explanation:
it seems there are some mistakes with this text.
if I understand correctly, than she runs on a circular track with a radius of 79 ft for 126 ft.
and we need to find the angle of the arc (the part-circle) she was running.
for that we need to find the ratio arc length / circle circumference, and then multiply that with 360° (you know, a full circle represents 360°, one full turn around), and that will be the arc angle.
the circle circumference is
2×pi×r = 2×pi×79 = 496.3716393... ft
the arc angle is therefore
360 × 126 / 496.3716393 = 91.38314201...°
rounded to the nearest degree : 91°
