Around 1800 (plus or minus about 5 years) is when it was estimated that the world's population had reached 1 billion.
Answer:
C. The formation name is symbolized by capital letters
Explanation:
The capital letter represents the the age of the geological unit and not the formation name. The history of the Earth has been divided by Geologists into Eons (the largest division), Eras, Periods, and Epochs , mostly based on the fossils found in rocks.
"The oldest rocks on this VFE are from the Conococheague Fm from the Cambrian period of geologic time. The Conococheague " These are both indicators of Tropical Climate and Shallow Marine. This is further explained below.
<h3>What is Tropical Climate?</h3>
Generally, The coldest month's average temperature must be at least 18 degrees Celsius (64.4 degrees Fahrenheit) for a climate to be classified as tropical, and hot temperatures prevail throughout the year.
In conclusion, "The Conococheague Fm of the Cambrian era has the oldest rocks on this VFE. The Conococheague Tribe of Indians "Climate and shallow marine environments are both indicative of a tropical climate
Read more about Tropical Climate
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The circle with diameter of 24 means that 2

r = 24.
Solving for r, we get

r=24.
Dividing both sides by

, we get r=24/

.
The area of the full circle is

times 24 squared over

. The

being multiplied cancels out, meaning that 24 squared over

is the area of the full circle. 24 squared is 576, and dividing by 16 we get

as the answer.
i hope this is the answer you are looking for.