Assuming the lowest elevation is sea level and that the contour interval is 50 feet, what is the approximate difference in elevation between point f and point a?

a) 0 feet
b) 25 feet
c) 100 feet

Why does a tidal bulge occurs on opposote sides of earth

Which of the following is not a challenge to instituting sound global environmental policies? a. most changes are inexpensive and easy to implement. b. elected leaders who support unpopular environmental issues often are not re-elected. c. economic considerations outweigh environmental ones in many societies. d. there is no way to enforce international environmental agreements.

If the distance between two points on the ground is 10 miles and the distance between the same two points on a map is 4 inches, what is the map scale expressed as a ratio?