A 28-ft ladder leans against a wall. The top of the ladder is 26 ft above the ground. Safety standards call for the angle between the base of the ladder and the ground to
be between 70° and 80°. Is the ladder safe to climb? Explain how you know.

its 69.420

step-by-step explanation:

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