Answer: 12.20 feet.
Step-by-step explanation:
Observe in the figure attached that a right triangle is formed.
Then, you need to remember the identity:

In this case you can identify that:


Then, to find the length of the wooden board (x), you need to substitute values and solve for x.
Therefore, you get:

The length of the wooden board is: 12.20 feet.
With what because I cannot see the math or any subject of the answer you need
Answer:
Hmmm... There's no question which leads to the reasoning that there is no answer.
Step-by-step explanation: