a.


b. Not exactly sure how DeMoivre's theorem is relevant, since it has to do with taking powers of complex numbers... At any rate, multiplying
and
is as simple as multiplying the moduli and adding the arguments:

c. Similar to (b), except now you divide the moduli and subtract the arguments:

Answer:

Step-by-step explanation:
hopethe answer helped you :)
I think it would require 100 workers since 1 worker digs up 1 yard.
Hope this helps.
Answer:
A.) The first graph
Step-by-step explanation: