Answer
See explanation
Work Step by Step
a) Convert mmHg to pascals:
$1\text{ mmHg}=`133.322\text{ Pa}$
Systolic pressure:
$120\cdot 133.322\approx 16,000\text{ Pa}$
Diastolic pressure:
$70\cdot 133.322\approx 9,333\text{ Pa}$
b) Convert $120\text{ mmHg}$ to psi:
$16,000\div 6894.76\approx 2.32\text{ psi}$
As a typical car pressure is around $30-35\text{ psi}$, it follows that $120\text{ mmHg}$ is far too low for a car tire. It would result in a dangerously underinflated tire, risking poor handling, increased wear, and potential tire failure.
