Earth has a surface area of 196 million square miles. What is its area in each unit? (a.)square kilometer (b.)square megameter (c.)square decimeter

Iknow the answer to 13 is b and 14 is d. i just need to know why the correct answers are correct

Skills of homo sapiens were found an excavation. the skulls were preserved because the bodies were frozen. so, these fossils are (blank) fossils.the image shows the evolution of skulls beginning 2 to 3 million years ago. based on the image, modern human skulls(blank) ape skulls.

The number to the right of an element's symbol (ex. c-12) identifies the of an isotope.