There are approximately how many people in the world today? A. 1.5 billion B. 7.8 billion C. 3 billion D. 10 billion

Find the coordinates of a if b(-9,-10) is the midpoint of ac and c has the coordinates of (-1,9)

8. is a technique that uses the images from several telescopes to produce a single image. a. reflection b. interferometry c. radiation d. refraction

Which country in the video has the highest population growth rate?