Correct. The product equals $\displaystyle{6.15}\cdot{4.7}\cdot{{10}}^{{{5}+{8}}}\usepackage{cmbright}\Huge\$ , which equals $\displaystyle{28.905}\cdot{{10}}^{{13}}\usepackage{cmbright}\Huge\$ . Since the 28.905 has more than one digit (from 1 to 9) to the left of the decimal point, we need to convert it. $\displaystyle{28.905}\cdot{{10}}^{{13}}={2.8905}\cdot{{10}}^{{1}}\cdot{{10}}^{{13}}={2.8905}\cdot{{10}}^{{{1}+{13}}}={2.8905}\cdot{{10}}^{{14}}\usepackage{cmbright}\Huge\$