Because of long hours, unsafe working conditions and low pay this secret society, that welcomed all workers, was formed in 1869.

This is the Knights of Labor

Explanation:

Hope this helps!

The Knights of Labor were a secret society that welcomed all workers!

angle a = 40.6°

step-by-step explanation:

for any right angle triangle we know the pythagoras theorem reveals

hypotenuse² = height²+base²

by this formula we will calculate the length of hypotenuse

h² = 6²+7²

⇒ h =√36+49 = √85 = 9.22

now from the given triangle sin a = height/ hypotenuse

                                                sin a = 6/9.22 = 0.651

therefore

so angle a = 40.6°

the answers are excess supply, and fall

hope this