Question

What is the approximate distance between Portland, Oregon (45° north, 122° west), and San Francisco, California (37° north, 122° west). Use 3,960 miles for the radius of Earth.


258 miles



553 miles



720 miles



1,346 miles

Answer 1

@uChezzy

Answer 2

720 miles :)

Answer 3

pinky promise?

Answer 4

pony promise ;)

Answer 5

oops the sector angle is 8 degrees on a great circle so its

\[d = \frac{8}{360} \times 2 \times \pi \times r\]

Answer 6

just check it with the formula... as 720 is not correct

Answer 7

what is correct???

Answer 8

@campbell_st