NEED HELP ON THIS WILL GIVE CROWN

Matt buys 14 jars of paint. Each jar contains 300 milliliters of paint.

How many liters of paint in all is there in the jars?

4.2 L

42 L

420 L

4,200 L

The cash price of a television is $580.the hire-purchase price of the television is $865.the hire-purchase price is an initial deposit of n% of the cash price and 6 equal monthly payments of $120.find the value of n.

Ineed with number 6 , explain how to get 1978

*let m∠cob = 50°30’, m∠aob = 70° and m∠aoc = 20°30’. could point c be in the interior of ∠aob? why?