What is the simplified form of each expression?
1).
a) 1
b) 0
c) -5.1
d)-1

2). 3g^-2 b^2
a) 3b^2/b^2
b) 3g^2 b^-2
c) 3gb^-4
d) b^2/3g^2

3). 3/g^-2 h^3
a) 3/g^2 h^3
b) 3g^2/h^3
c) 6^g/h^3
d) 3/gh

4). what was the value of 2x^-2y^-2 for x=3 and y= -2
a) 1/18
b) 72
c) 2(-6)^-4
d) 1/648

5). what was the value of 1/2^-2 x^-3 y^5 for x=2 & y= -4
a) 16
b) -4
c) -1/32
d) -16