Jason walked 70 miles in 8 days. Find the unit rate

Can someone me with this problem . show your work .

Apassenger train and a freight train leave san jose at 3pm, traveling in the same direction. the passenger train is going three times as fast as the freight train. at 6pm they are 240 miles apart. how fast is each travelling? explain your answer and show your

This summer the number of tourists in salem increased 4.5% from last years total of 426000. how many more tourists came to salem this summer