United States have over 500 million people living
Its b i think but i might be wrong i looked it up
Answer: We study other star systems in spaceships and big, professional telescopes
The Three Gorges Dam is located along the Yangtze River.
Based on the calculations, the approximate area covered by the reservoir is equal to 0.28 km².
<h3>What is the area of a circle?</h3>
The area of a circle simply refers to the space occupied or the region enclosed by a circle within its boundary, and in a two-dimensional plane.
<h3>How to calculate the area of a circle?</h3>
Mathematically, the area of a circle is calculated by using this formula:
Area = πr²
<u>Where:</u>
r is the radius of a circle.
<u>Given the following data:</u>
Diameter of circle = 0.6 kilometer.
π = 3.14.
Radius = 0.6/2 = 0.3 km.
Substituting the given parameters into the formula, we have;
Area = π × 0.3²
Area = 3.14 × 0.09
Area = 0.28 km².
Read more on circle here: brainly.com/question/14478195
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