A flat 12-foot board rests with one end on the ground and the other end up on a ledge that is 4 ft. above the ground. What is the angle the board makes with the ground?

step-by-step explanation:

x^2 -12x + 36 + y^2 = 36

x^2 + y^2 = 12x

r^2 = 12rcos(theta)

r = 12 cos(theta)

(23*2)-12=x     x=34

step-by-step explanation:

$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

1. 3. can also be expressed as (22/7)

2. -4.5

3. 3.6

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