This is called baptism in churches that perform this on babies, although its validity as qualifying as the ritual of baptism is questioned by some denominations.
triplicate
"triplicate"
She is called "Hajjah".
3x2 can be called "three times x squared", "three x squared", or "three times x to the power of two".
cubed
Just do the same thing you did to get one, three times (still ignoring those chests)
The only thing I can think of is a "Hat Trick". It's a general term meaning that something positive has happened three times in a row. In hockey this would mean scoring three times in a row.
There is this new thing called a calculator. You should get one.
Cubed is the third dimension because it is a cube. A cube has three dimensions of equal amount. A cube of three-inch sides, to get its volume you'd multiply three times three times three, which is three cubed.
Three lefts make a right.
car
4 sqrt(3) is. 8 of anything, minus 4 of the same thing, always leaves 4 of them.