Calculate the sum of 3/1².2 ² + 5/2².3² + 7/3².4² ++ 19/9².10²

Do you guys know all the answers to this

Which factors add to the greenhouse effect and are caused by human activities?

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.