Use a Graphing Calculator to Estimate the Solution Set of the Equation

Multiple Choice

Use a graphing calculator to estimate the solution set of the equation. Round to the nearest hundredth.
- $9 \mathrm { e } ^ { 2.2 \mathrm { x } } = 50$

A) $\{ 0.78 \}$
B) $\{ 1.71 \}$
C) $\{ 5.14 \}$
D) $\{ 3.77 \}$