Which parameter in the hist() function controls the transparency of the bars in a histogram

Which of the following best illustrates a quinary economic activity?

Population pyramids for wealthy countries typically show a narrow base and a wider top, indicating low fertility and higher life expectancy.

Match the file reading methods with their descriptions:

The growth of intensive commercial agriculture is primarily driven by access to large, inexpensive land far from urban centers.

Which mode should be used to append data to an existing file without overwriting its contents?

The boundaries of perceptual regions, like “the South” or “the Heartland,” are shaped more by cultural understandings than measurable physical features.

The Schengen Agreement eliminated all international migration restrictions within the European Union.

Fully describe the methods used to process EMG data and control for EMG confounding including: 1) how was emg voltage converted to all positive values? 2) what are the 3 primary confounders of EMG and how did you control for them? 3) what was the normalization process and final units of measurement?

If a list a = [4, 5, 6] is cloned as b = a[:], and a.append(7) is executed, what is the length of b?