Help! 20 Points! + Brainliest! Which expressions have been simplified correctly? Choose exactly two answers that are correct. xy^-3=1/xy^3
z^-2=1/z^2
2^-4=-16
(ab)^0=1

maybe i can

the highest percentage for deaths in construction from highest to lowest is as follows: falls, struck by objects, electrocution, and caught-in/between. these four are collectively known as fatal four.

in the case of falls, the type that is responsible for the overall highest death in the category is falls from roofs.