1) is correct.
2) is correct.
3) is correct.
4) is correct.
5) is not there.
6) is your first choice.
7) is incorrect is your second choice.
8) is your first choice.
13) is your last choice.
14) is your last choice.
15) is your third choice.
Hello: here is a solution
4^3
You Would Write Is 4x4x4
You Would Verbally Say Four To The Third Or Four Cubed
