Which of the following expressions would represent a class of 30 students divided equally into 5 groups?

look a the sides they are perpendicular

the anwser is d) 75°

step-by-step explanation:

answer: this is not a question

step-by-step explanation: this is a answer

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