Answer the question with the question number thx

I NEED URGENT ASSISTANCE
8. is the following statement always, never, or sometimes true?
a number is raised to a negative exponent is negative?
A always
B never
C sometimes
9 simplify(4xy^2)^3(xy)^5
A 64x^8 y^11
B 64x^15 y^30
C 12x^2 y^11
D 12x^8 y^11
10 simplify(2t^-3)^3(0.4r)^2
a 3.2r^2
b 1.28r^2/ t^-6
c 1.28r^2/ t^9
d 0.8r^2/ t^-6