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Earn +20 ptsQ: How many cannonballs are in the stack What is the number of cannonballs?
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The nth pyramidal number tells how many cannonballs there are in a square arrangement that is n cannonballs high?
This describes a four-sided pyramid.
How the nth pyramidal number tells how many cannonballs there are in a square arrangement that is n cannonballs high?
It is n*(n + 1)*(2*n + 1)/6
The height of a stack of dimes varies directly with the number of dimes in the stack A stack of 4 dimes is 5.4 mm tall How many dimes are in a stack that is 27 mm tall?
20 dimes
The nth pyramidal number tells how many balls there are in a pyramidal stack that is n layers tall What kind of pyramid is the stack?
This describes a four-sided pyramid.
A stack of pennies and dimes has a total value of $2.31. How many dimes are in the stack if there are twice as many dimes as pennies?
You have 22 dimes and 11 pennies.
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