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As there is only one negative sign, our answer will also only have one negative sign, and the answer will be negative. As you can see, A and B are both positive, so they are not the answer.

C reverses our original number, so it is not equivalent.

D just moves the negative sign, which will allow our fraction to stay the same. Therefore, our answer is .

I hope this helps!

answer:   28.56 feet (approx)

step-by-step explanation:

since, triangle abc has measure of angle c equal to 55 degrees, measure of angle abc equal to 90 degrees, and length of bc equal to 20 feet.

we have to find out the measurement of segment ab.

therefore, tan 55° =

but bc = 20 feet.

⇒ tan 55 ° =  

⇒ ab = 20 × tan 55 °

⇒ ab = 20 × 1.42814800674

⇒ ab = 28.5629601348   ≈ 28.56 feet