Which expression is equivalent to 56?

A) 5 × 5 × 5 × 5 × 5 × 5
B) 6 × 6 × 6 × 6 × 6 × 6 × 6
C) 6 × 5
D)
5
6

I suspect you mean 5^6

That just means multiply 5 over and over, right?
5^2 = 5x5
5^3 = 5x5x5
and so on