What is 0.0000000605 in scientific notation

A number in scientific notation is expressed as the product of a mantissa and an integer power of 10. The mantissa is a number that is greater than or equal to 1 and less than 10.

$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