How many different ways can you arrange five people shoulder to shoulder in a line

Two fire-lookout stations are 190 miles apart, with station a directly south of station b. both stations spot a fire. the bearing of the fire from station a is upper n 55 degrees upper e and the bearing of the fire from station b is upper s 60 degrees e. how far, to the nearest tenth of a mile, is the fire from each lookout station?

Which of the following is most likely the next step in the series? a3z, b6y, c9x, d12w, е15v, f18u

What is the least common factor of 6 and 8