What construction does the image below demonstrate?

a circle is drawn and new circles have been constructed at the length of the radius in a pattern around the original circle.

the circumcenter of a regular hexagon
the incenter of a regular hexagon
a regular hexagon circumscribed about a circle
a regular hexagon inscribed in a circle

What's erosion? a. the breakdown of rock into smaller pieces b. the removal of weathered products from rock c. a change in rock resulting from exposure to water d. a chemical change in rock that weakens it

Look at the data above. provide an explanation for europe’s projected population decrease by the year 2050. (i'm doing this for future kids) the answer is : the percentage of people over the age of 65 and under the age of 15 in europe is currently the same at 16% each. therefore, the majority of the population is between the ages of 16 and 64. in forty years from now, in 2050, a greater percentage of the population will be over the age of 65. europe also has a relatively long life expectancy of 75 years. this, combined with a low birth rate means that by 2050 europe’s population will actually be less than it is today.

Why is the study of demography important to geographers