2.5×10−7y−12.5 \times 10^{-7} y^{-1}2.5×10−7y−1
3.5×10−6y−13.5 \times 10^{-6} {y}^{-1}3.5×10−6y−1
2.4×10−4y−12.4 \times 10^{-4} {y}^{-1}2.4×10−4y−1
3.2×10−3y−13.2 \times 10^{-3} y^{-1}3.2×10−3y−1
