QUICKKK PLSSS help which one is equivalent to (8^-a)^b

Plz me i need i will give a brain

The longer leg of a 30° 60° 90° triangle is 16 times square root of three how long is a shorter leg

Tod does not have any cookies. david gives jeff 8 cookies. then he splits half of the cookies he has left with tod. david let’s c represent the number of cookies that he starts with. he finds the number of cookies that tod has is 1/2 the difference of c and 8. write an expression to represent the number of cookies that tod has.