History - Battle of Louisburg
https://www.youtube.com/watch?v=AYv7BRrOtqw
Surface area of sphere
- find the standard size NBA basketball (radius and the price), the soccer balls that are used in World Cup (radius and price), and Makasa volley (radius and price), find their surface area
- Find how much land area on Earth (hint: surface area of Earth, and then estimate % of land on the Earth surface)
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