Mhanifa can you please help? This is due asap

5,600 x 10^3 = a) 560 b) 5,000,600 c) 5,600,000 d) 56,000

What is the y-intercept of the line given by the equation

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. ?