Idon't know how to solve the question and i don't understand it ..

True or false look at the picture pls : /

Simplify. (-2)^-3 a. -8 b. -1/8 c. 1/8 d. 8

Aword processing program requires a 7- digit registration code made up of the digits 1,2,4,5,6,7 and 9 each number has to be used and no number can be used mor than once how many codes are possible