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Question: What was the diameter of the semispherical hole in the ground a farmer dug out, to extract enough earth to fill a conical container with 12 foot diameter and 8 foot deep.
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D=10.48 feet > V = 1/3 _r^2 h = (half of 4/3 _ r^3)
1/3 _ 36*8 = 2/3 _ r^3 > 288 = 2 r^3 > 144 = r^3 > r=5.24 feet)
 Question: A theater has 32 rows with 24 seats in each row. If 75% of the seats are occupied, how many seats are empty?
Show Answer Hide Answer Question: What is the total surface area (to nearest whole number) of a cylindrical soup can which is 6 inches tall and 3 inches in diameter?
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What is the total surface area (to nearest whole number) of a cylindrical soup can which is 6 inches tall and 3 inches in diameter?  Question: BONUS: This important mathematical concept was invented around the 9th century in India and called __nya in Sanskrit, and later called zephirum in Medieval Latin, but today we call it what?
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Zero, as a number and not merely a placeholder. 

