Q1- A
Q2-A
Q3-C
Q4-C
Q5-A
Q6-D
Q7-C
Q8-A
Q9-D
Q10-C
Answer:
your answer is 21 hours, 36 minutes
Explanation:
Armstrong spent 21 hours, 36 minutes on the moon's surface.
hope that helps
have a great rest of your day! ;)
Answer:
Their system of mathematics.
Explanation:
The Maya discovered zero. Most of the world's civilizations had no concept of zero at the time of the Mayans. Without zero there would be: No algebra, no arithmetic, no decimal, no accounts, no physical quantity to measure, no boundary between negative and positive numbers, and no computers. The Mayan’s discovery of zero was one of the most significant steps to get to where we are today.
The counting system was so simple. The Mayans figured out a genius system of counting which only required three symbols, a dot, a line, and a shell. These three symbols could be used in various combinations to keep track of the calendar and do arithmetic. Even the most uneducated people could use it to do basic trade.
C is the answer it was put on freshly laid plaster or lime plaster
