Is markup and selling price the same?

Which value is not a solution of 8x^3 – 1 = 0

It took alice 5 5/6 hours to drive to her grandparents' house for . on the way home, she ran into traffic and it took her 7 3/8 hours. how much longer did the return trip take? write your answer as a proper fraction or mixed number in simplest form. the trip home took __hours longer. ?

Pls brainliest will be awarded if answer is correct