Likewise, if the population consists of equal numbers of males and females, and if the females give birth to 3 children each (and the males 0), then the average birth rate of the population will be 1.5. With these basics we can now consider two simple models of population growth:
For most purposes scrolls have long been superseded by the codex book format, but they are still produced for some ceremonial or religious purposes, notably for the Jewish Torah scroll for use in synagogues.
The scroll function on a laptop computer allows you to use the touch pad for vertical scrolling in the same way a mouse wheel works with the cursor on the screen. The touch pad on a laptop can scroll horizontally as well.