The population of a town doubled in 5 years, then doubled again in the next 10 years. What is the percent of increase?
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Answer:
<h2>3,600 m²</h2>Step-by-step explanation:
The formula of a surface area of a sphere:
<em>R</em><em> - radius</em>
<em />
We have <em>R = 30m</em>.
Substitute: