Answer:Of all the world's ancient calendar systems, the Maya and other Mesoamerican systems are the most complex, intricate and accurate. Calculations of the congruence of the 260-day and the 365-day Maya cycles is almost exactly equal to the actual solar year in the tropics, with only a 19-minute margin of error.
Maya astronomer-priests looked to the heavens for guidance. They used observatories, shadow-casting devices, and observations of the horizon to trace the complex motions of the sun, the stars and planets in order to observe, calculate and record this information in their chronicles, or "codices". From these observations, the Maya developed calendars to keep track of celestial movements and the passage of time. The Maya also kept detailed records of the moon, although these do not seem to constitute a formal lunar calendar
Explanation:
Answer:the third one and the last one
Explanation:
Answer:
Voting Rights Act 1965
Explanation:
The law or amendment that had the greatest impact on expanding voting rights between 1865 to today is "Voting Rights Act 1965."
The Voting Rights Act 1965 enforces the Fifteenth Amendment of the United States Constitution.
Following the adoption of the Voting Rights Act 1965, about a quarter of a million new African American voters had been registered across the country at the end of the year.
The voting rights act 1965 made any form of racial, religious, and financial status, and sex discrimination toward voting rights illegal.
The answers are a), b), and c). Despite economic prosperity, the United States suffered from widespread poverty. Unions comprised almost half of the workforce, resulting in a large-scale expansion of the middle class in the 50's.