a boat travels 368 kilometers in 7 hours
(with a constant speed). how much time
will it take traveling 68 kilometers?

the star of david was known as the jewish star : d

the present continuous is a verb tense which is mainly used to indicates that an action is in progress at the moment of speaking.  

it is formed using: person + verb to be (am/is/are) +verb + - ing form  

example: i am studying at this moment .

in addition, the present continuous is also used in order to express things that will or will not happen in the near future.

example: i am having dinner with some friends tonight.

the speaker sometimes   uses it   to express that an action is repeated and it causes irritation on the part of the speaker

example: my sister is constantly complaining about everything.

ugly things like bugs or something?

" the king sits next to a crown , which symbolizes his power" is   correct   the king is standing on his feet wearing expensive clothing next to the crown.

"the king is wearing elaborate clothing." is correct. this is a symbol of wealth and   royal power.

the king is not dressed like a soldier but like a monarch.

"the king has a sword but he   sits next to a helmet" is correct.

the king is not sitting on the floor.