least to greatest 3 to the power of -2,5 to the power zero power,2 to the power of -3, -7
$$\mathbf{3^{-2},5^{0},2^{-3},-7}$$
$$3^{-2}=1/3^{2}=1/9=\mathbf{0.1111} (4 d.c.p.)$$
$$5^{0}=\mathbf{1}$$ (anything ^0 = 1. See how: $$2/2=1$$ $$2^{6}/2^{4}=2^{6-4}=2^{2}$$ $$2^{6}/2^{6}=1=2^{6-6}=2^{0}$$)
$$2^{-3}=1/2^{3}=1/8=\mathbf{0.125}$$
I think you will be able to order them now :)
$$\mathbf{3^{-2},5^{0},2^{-3},-7}$$
$$3^{-2}=1/3^{2}=1/9=\mathbf{0.1111} (4 d.c.p.)$$
$$5^{0}=\mathbf{1}$$ (anything ^0 = 1. See how: $$2/2=1$$ $$2^{6}/2^{4}=2^{6-4}=2^{2}$$ $$2^{6}/2^{6}=1=2^{6-6}=2^{0}$$)
$$2^{-3}=1/2^{3}=1/8=\mathbf{0.125}$$
I think you will be able to order them now :)