7. the timeline below covers the entire interval of earth's history, from the formation of the earth and solar system nearly 4.6 billion years ago to the present day. examine the timeline, then answer the question that follows. recorded human history accounts for about half of the earth's history. only the last 100 million years of earth's history. all of the earth's history. a very small portion of the earth's history.

Match the following terms and definitions a region in arkansas defined by the arkansas river in the western part of the state answer 1 a thoroughly dissected area with steep valley walls and narrow floors answer 2 a geographical region of a country or state answer 3 the friendly and generous reception and entertainment of guests, visitors, or strangers answer 4 the branch of knowledge concerned with the production, consumption, and transfer of wealth answer 5 statistical data relating to the population and particular groups within it answer 6 a mountain range in west central arkansas and southeastern oklahoma answer 7 travel for pleasure or business; also the theory and practice of touring, the business of attracting, accommodating, and entertaining tourists, and the business of operating tours answer 8 answer all parts of the question.

[bws.05]where would uncharged particles be most likely found in an atom? o on the electrons o inside the protons o inside the nucleus outside the nucleus

In the diagram below, ab and bc are tangent to o. what is the measure of