AUT02-14

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a. $\dfrac{V_f - V_i}{V_i} = \dfrac{42 -30}{30} = \dfrac{12}{30} = 0,4 = +40\:\text{%}$.

b. $\dfrac{V_f - V_i}{V_i} = \dfrac{40 -50}{50} = \dfrac{-10}{50} = -0,2 = -20\:\text{%}$.

c. $\dfrac{V_f - V_i}{V_i} = \dfrac{120 -80}{80} = \dfrac{40}{80} = 0,5 = +50\:\text{%}$.

d. $\dfrac{V_f - V_i}{V_i} = \dfrac{5 -8}{8} = \dfrac{-3}{8} = -0,375 = -37,5\:\text{%}$.

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code : 1155