A symbol or set of characters in a programming statement whose value can be changed
Answer: 1820
Explanation:
I <u>believe</u> the answer is the 1820, as the introduction of steam powered printing presses and steam powered paper mills significantly lowered the cost of books to decrease and significantly increased their circulation/availability.
hope this helps
-lvr
Answer:
optical sensors
Explanation:
optical sensors measure the amount of gases like carbon dioxide and carbon monoxide in the air
Answer:
Your computer does not support this code because you have put spaces in between the code, or maybe that is how you have written the question.
This is to much work for 5 points cmon
