9. a long-exposure photograph of the stars reveals quarter-circle tracks: how long was the exposure? [a] 2 hrs [b] 3 hrs [c] 4 hrs [d] 6 hrs [e] 8 hrs

In 1870, which path would settlers moving west from el paso to los angeles have followed? a) old spanish trail b) gila trail c) california trail d) oregon trail

Solve for r in the formula v = ir, when i = 5 and v = 15.

Name one type of data that h-r diagrams do not show.