Mr. john doe was fighting out his federal income tax. his income was $26,800, but he was able to subtract $5,500in deductions. he paid 15% of the remaining income in tax. how much did he pay?

Mr. John Doe paid $3,195

$26,800 - $5,500 = $21,300

100% - 15% = 85%

$21,300 - 85% = $3,195

1 number

if we use a graphing calculator, there is only one such number that satisfies the conclusion of the mean value theorem, that is, a number such that

where the right-hand side is the average rate of change of f on the interval [0.5,0.75], which is the slope of the secant line.

in the attached graph, the black line is the secant line which has its slope as the average rate of change of f on [0.5,0.75], while the orange line is the only tangent line to the graph of f in the interval that satisfies the mvt conclusion.