What system was used by both ancient Mesopotamia and ancient Egypt to make trade easier?

The round cakes represented the moon, with candles adding light. cakes specifically for birthdays (rather than weddings) originated in  15th century  germany. these single layer cakes were especially popular for first birthdays. in the  18th century  children's birthday parties called kinderfesten became popular.hope this vote me brainiest!

The court held that the company had no statutory or regulatory authority to  requireits employees taking approved  intermittent  leave to obtain a  doctor's note for each absence. instead, the regulations provide that an  employer can  verify the  absence-condition connection by means of recertification."