Which two observations can be made in relation to population growth over centuries?
a. the world population began declining after world war i and world war ii.
b. in the twentieth century alone, the world population grew by more than 5 billion people.
c. population grew slowly until the eighteenth century because death rates were higher.
d. poverty, employment, and living standards are not affected by population growth.

Topographic maps are used to measure a-composition b-movement c-elevation d-texture

Which sequence of transformations on preimage ∆abc will not produce the image ∆a'b'c'? a. reflection across the line y = x b. rotation 180° clockwise about the origin followed by a reflection across the line y = -x c. reflection across the x-axis followed by a reflection across the y-axis d. reflection across the line y = -x followed by a rotation 180° counterclockwise about the origin e. reflection across the y-axis followed by a rotation 90° clockwise about the origin

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.