Question and answer choices are attached. Please pick the right answer and explain/show work if possible. Thanks!

Choice c.

Step-by-step explanation:

Vectors

Suppose we have a vector v defined as

The magnitude of the vector is:

On the other hand, the dot product of the vector by itself is:

Note the relation between these two operations is:

Since we are given:

, then:

Choice c)

$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