Answer
773.43 torr
Work Step by Step
We have 30.45 in Hg. First we convert the inches to mm as follows:
1 inch is 2.54 cm
1 cm is 10mm so we have;
30.45 in Hg * (2.54cm/ 1 in) * (10mm / 1cm) = 773.43 mmHg
Since mmHg and torr are the same we have 773.43 torr