Write each answer with the correct number of significant figures.

(a)$\mathbf{1}\mathbf{.}\mathbf{0}\mathbf{+}\mathbf{2}\mathbf{.}\mathbf{1}\mathbf{+}\mathbf{3}\mathbf{.}\mathbf{4}\mathbf{+}\mathbf{5}\mathbf{.}\mathbf{8}\mathbf{=}\mathbf{12}\mathbf{.}\mathbf{3000}$

(b) 106.9 - 31.4 = 75.5000

(c)$\mathbf{107}\mathbf{.}\mathbf{868}\left(2.113\times {10}^2\right)\mathbf{+}\left(5.623\times {10}^3\right)\mathbf{=}\mathbf{5519}\mathbf{.}\mathbf{568}$

(d)$\left(26.14/37.62\right)\mathbf{\times }\mathbf{4}\mathbf{.}\mathbf{38}\mathbf{=}\mathbf{3}\mathbf{.}\mathbf{043413}$

(e$\left(26.14/\left(37.62\times {10}^8\right)\right)\mathbf{\times }\left(4.38\times {10}^{-2}\right)\mathbf{=}\mathbf{3}\mathbf{.}\mathbf{043413}\mathbf{\times }{\mathbf{10}}^{\mathbf{-}\mathbf{10}}$

(f)$\left(26.14/3.38\right)\mathbf{+}\mathbf{4}\mathbf{.}\mathbf{2}\mathbf{=}\mathbf{4}\mathbf{.}\mathbf{5999}$

(g)$\mathit{l}\mathit{o}\mathit{g}\left(3.98\times {10}^4\right)\mathbf{=}\mathbf{4}\mathbf{.}\mathbf{5999}$

(h)${\mathbf{10}}^{\mathbf{-}\mathbf{6}\mathbf{.}\mathbf{31}}\mathbf{=}\mathbf{4}\mathbf{.}\mathbf{89779}\mathbf{\times }{\mathbf{10}}^{\mathbf{-}\mathbf{7}}$

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