At the age of 20 weeks, zoe weighed 16 lb 4 oz. her birth weight was about 33 1/3% of her 20- week weight. to the nearest ounce, what was her birth weight?

$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