The base $\displaystyle{b}={10}\usepackage{cmbright}\Huge\$ , the exponent $\displaystyle{y}=-{1}\usepackage{cmbright}\Huge\$ , and $\displaystyle{x}={0.1}\usepackage{cmbright}\Huge\$ , so $\displaystyle{{10}}^{{-{1}}}={0.1}\usepackage{cmbright}\Huge\$ .