## College Algebra (6th Edition)

If one year = 3.2$\times10^{7}$ then 1.35 trillion seconds = 42187.5 years
One year = 32000000 seconds = 3.2$\times10^{7}$ Number of years in 1.35 trillion seconds = $\frac{1.35\times10^{12}}{3.2\times10^{7}}$ = 42187.5 years