Answer
$3.1557\times10^{6}$ $ s/solar year$
Work Step by Step
1. $\frac{60s}{1min}\times \frac{60 min}{1 h} \times\frac{24h}{day} \times \frac{365.24 day}{1solar year} = 31556736$ $ s/ solar$ $year$
2. Since the only number that has limited number of significat figures is 365.24, then we round the final answer based on the number of siginificant of this number, 5 significant figures
$31556736$ $ s/ solar$ $year$ $\approx 3.1557 \times10^{6}$ $ s/ solar$ $year$
