Help me with questions six

Nneeedd 1.find the residual if you know the actual number is 5.2 and the predicted value is 4.8

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. ?

Which of the following is the shape of a cross section of the figure shown below