Given:
ab = bc
angle bdc = 37½°
angle cbd =
37.5
60
105

105 is right

Step-by-step explanation:

Given that AB=BC

Also angle BDC =37.5

Then angle subtended at the centre would be twice angle subtended at the arc

Hence we get

Angle CBD = supplementary of twice 37.5

In other words CBD and 75 degrees are supplementary

Hence Angle CBD = 180-75

=105 degrees

Last option is right.

$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