In Exercises 77–86, (a) use zoom-in techniques to estimate the roots of each...

In Exercises 77–86, (a) use zoom-in techniques to estimate the roots of each equation to the nearest hundredth, as in Example 6; and (b) use algebraic techniques to determine an exact expression for each root, then evaluate the expression and round to four decimal places. Check to see that your answers are consistent with the graphical results obtained in part (a).

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(b) Solve the given equation algebraically by rewriting it in logarithmic form. Give two forms for the answer: an exact expression and a calculator approximation rounded to three decimal places. Check to see that the result is consistent with the graphical estimate obtained in part (a).