Question

question 13
arabic mathematics revolutionized european economies by introducing
arabic numerals, which replaced roman numerals.
the concept of long division.
the concept of a decimal.
the concept of 1.
imaginary numbers.

Explanation:

Arabic numerals (0 - 9) were more efficient for calculations in trade, accounting, and economic activities compared to Roman numerals. Long - division, decimals, and the concept of 1 were not as revolutionary for economies as the numeral system. Imaginary numbers are more of a mathematical concept with less direct economic impact in this context.

Answer:

Arabic numerals, which replaced Roman numerals.