What is the smallest angle of rotational symmetry that maps a regular octagon onto itself?

What is the name of the ocean current that affects the british isles? how does it influence their climate?

Which statement explains what upwelling causes? a. upwelling causes tides to rise and fall. b. upwelling causes changes in the direction of currents. c. upwelling causes nutrients, minerals, and tiny organisms to rise. d. upwelling causes currents in the pacific ocean to change direction. i think the answer is c.

Which layer surrounds the center of the earth? a: crust b: core c: mantle