Shona drove 264 miles in 5.5 hours at this rate how far can she drive in 7 hours

Can someone me with the property questions for 12 13 and 14 plz

Parabolas y=−2x^2 and y=2x^2 +k intersect at points a and b that are in the third and the fourth quadrants respectively. find k if length of the segment ab is 5.

Pls brainliest will be awarded if answer is correct