9×sqr(x² - 144)/x² - 144
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Answer: To let the black kids in the school without getting hurt
Explanation
Answer:
(B) Cheaper
Explanation: Books were written by hand, which made them rare and expensive. The invention of the printing press, using movable type, by Johannes Gutenberg in 1440 made books cheaper to produce, encouraging writing and the sharing of knowledge.
<span>The adventurers is the correct answer </span><span />
A historian using the historical thinking skill of chronological thinking might put evens that took place in history in "chronological order" in the hopes of understanding why certain events took place after others. This helps the historian determine "cause and effect".
