6 ft
12 ft
9 ft
|?
15 ft

18

Step-by-step explanation:

The pattern goes X2 then -3 interchangeably.

6 x 2 = 12

12 - 3 = 9

9 x 2 = 18

18 - 3 = 15

$4034.40

the perimeter of the field is the sum of the lengths of the four sides:

47 yd + 158 yd + 47 yd + 158 yd = 410 yd

the cost of 3 ft (1 yd) of fence is 3×$3.28 = $9.84.

so the cost of jake's wood perimeter fance is

(410 yd) × ($9.84 /yd) = $4034.40