Cosine is transformed in the form:

The amplitude is a
The period of cosine is:

And the phase shift is always by c, so that means our transformed functon in the form mentioned above looks like:

So our period is 
Our phase shift is by
units to the right
and our amplitude is 3.
So men to women=3 to 4
210 men
210 represents 3 units
wome=4
210=3 units
divide by 3
70=1 unit
multiply by 4 to find women
280=women
total workers=women+men
women=280
men=210
280+210=490
total =490
Um A idk "Which measure provides the best information to the company?" I guess so
The odd number is 17 because it cannot be evenly divided by 2