Please help I am time What major concept did the Maya contribute to the field of mathematics? calculating the speed of light
introducing zero as a placeholder
inventing algebra
O creating the system of numbers most used today

What form of government is powers of states?

Where did people have to work with great organization to be successful at farming? a. on the yellow river basin c. on the hangzhou bay b. on the yangzi river basin d. on the hubei basin

Using reputable online news sources, find an article about a current event that has happened within the last 12 months that deals with any of the ideas that came about during the enlightenment. for example, you might choose an event that involves freedom of speech, religious tolerance, or the right to vote. alternately, you can choose an event where these values or ideas are absent and would make a tremendous difference if they were present. once you have chosen an event, answer the following questions: what website did you use for your research? what is the title of your article? who is the author of your article? what is the event you read about?