The effect of the time of day a science class is taught on test scores is being studied in an experiment. Which of these is most likely to be an extraneous factor that could also affect test scores? A.
Color of the school hallways
B.
Principal of the school
C.
Student clothing
D.
Difficulty of test questions

gdp is the best phrase!

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