Answer:
See below.
Step-by-step explanation:
(a). Radius of the pond R = 1/2 * 28 = 14m and the radius of the greater circle r = 14 + 7 = 21 m.
Area of the path = area of the greater circle - area of the pond
= π * r^2 - π *R^2
= π * 21^2 - π *14^2
= 769.69 m^2.
(b). Cost of the path
= area of the path * 30
= $23,090.70
