In a perfectly competitive market, prices and production costs are kept ?

Varied.

Explanation:

Market is a place whereby buyers and sellers meet, in which sellers provides goods and services to the buyers in exchange for money. There are some markets in which there are few sellers of a particular goods and services(or many sellers with different goods and services and the kind of market is known as monopolistic competitive market) and there are also some markets in which we have numerous buyers and sellers.

When there are many or numerous buyers and sellers in a market we say that the market is a PERFECTLY COMPETITIVE MARKET.

The other characteristics apart from the numbers of buyers and sellers of perfectly competitive market is that "prices and production costs are kept" varied because there is no access to price control.

beowulf is considered an epic poem because it describes the actions of a great warrior.

beowulf is taken into account an epos. in this poem, the main character may be a hero who travels nice distances to prove his strength at not possible odds against supernatural demons and beasts. in the poem, beowulf was a young warrior and he leaves his country to hrothgar, as hrothgar was in a great trouble.

no it wouldn't because yellow journalism would exaggerate in everything.