Hello!! Yi jiao is one of the divisions of Chinese yuan, Yi jiao is like a dime, Er jiao are 2 dimes, and so on and so forth. One Chinese yuan is made up of 10 jiao.
IT IS 4 Duh!!!!!!
4
2 times 2 is 4 2 x 2 is 4 2 times 2 is 4
2 to the power of -2 is equal to 1/4. x to the power of -y is equal to 1/xy.