Why is it inportant to have a symbol for zero

Which of the following actions best shows how a historian would study the historiography of the french revolution? o a. reading about how earlier historians wrote about the french o b. creating a map of the important events of the french revolution o c. writing an unbiased history book about the french revolution's revolution leader o d. placing key events of the french revolution in chronological order

What is the main idea of this excerpt? 1.1.3

10. what kind of person makes a good entrepreneur? list at least two personality traits of a successful entrepreneur.