What does high population density mean?

(10 points) 1. cone 2. rectangle 3. triangle 4. circle 5. cylinder a. perpendicular cross section of a pyramid b. perpendicular cross section of a cylinder c. parallel cross section of a sphere d. shape created when a rectangle is rotated about the y-axis e. shape created when a right triangle is rotated about the y-axis

Countries in this region are trying to achieve development. a. attainable c. sustainable b. suspendable d. intangible

The inner planets mercury, venus, earth, and mars were formed by