Final answer:
Zenith Corporation will record $90,000 of goodwill and $510,000 as its investment in Plummet.
Step-by-step explanation:
The fair value of Plummet's net assets is greater than its book value, indicating that there is goodwill associated with the acquisition. Goodwill is the excess of the purchase price over the fair value of net assets acquired. In this case, Zenith Corporation paid $500,000 for the acquisition, which is $90,000 more than the fair value of Plummet's net assets. Therefore, Zenith will record $90,000 of goodwill and $510,000 as its investment in Plummet, which is equal to the fair value of net assets.