Solve the following equations. Giving the answers exactly (with logs as base e or base 10), and round the answers to two decimal places. \text { (a) } 5 e^{3 x}-7=13 \text { (b) } \ln (2-x)=3 \text { (d) } 160^{x}+4=110 \text { (e) } x^{2} e^{x}-49 e^{x}=0 \text { (f) } \log x+\log (x-1)=\log 12 \text { (c) } 5+7 \log (4 x)=19

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