Enter the correct letter to match each summation expression with the property or n
Σca;
is equal to
n(n + 1)(2n + 1)
6
n
is equal to
b n(n + 1)
2
i=1
n
n
Σ
is equal to
«Σα;
i=1
i=1
n
3
is equal to
den
i=1
n
is equal to
[ n(n+1) 12
2
n )]
i=1

Pyotr tchaikovsky sporting goods operates on a 45% overhead based on the selling price, which results in an overhead of $65.34 on the newest version of an air hockey game set. if the air hockey game set costs pyotr tchaikovsky sports $49.32, find the selling price, the markup, and the net profit.