The nth pyramidal number tells how many cannonballs there are in a square arrangement that is n cannonballs square. a: true b: false

This statement is true.

A pyramidal number tells the number of balls that could be stacked evenly with square bases. If were are looking for the nth pyramidal number, that is a pyramid with a square base that is n by n.

A) for the n row: 22+(n-1)×6therefore,b) 100-22=78that means (n-1)×6=7878÷6=1313+1=1414th row has 100 seats

The solution to the system of equations (-2,2)