an exponent tells you how many multiples there are of a number.
1a. (0.6)^2 = (0.6)*(0.6) = 3.6
1b. 4^2 = 4*4 = 16
An exponent of 1 is just one of the number, an exponent of zero is always equal to 1.
2a. (0.3)^1 = 0.3
if there's parenthesis, you must multiply all within it by itself.
3a. (1/10)^2 = 1^2/10^2 = 1/100
3b. (2/3)^2 = 2^2/3^2 = 4/9
hope this helps. let me know if you have any other questions.