$1\mathrm{.}1[$HW$02-$Prob$2]$ The helium$-$filled blimp shown in the figure below is used at various athletic events

at a temperature and pressure of $83F$ and $14\mathrm{.}4$ psia, respectively.

a$)$ What is the key difference between psi and psia pressure measurements?

psi measures pressure relative to atmospheric pressure, while psia

measures pressure absolute or full vaccum.

psi and psia refer to different units of pressure, with psi being the SI unit and psia

being the metric unit.

psi and psia are the same and can be used interchangeably.

psi measures pressure absolute$,$ while psia measures pressure relative to

atmospheric pressure.

$1\mathrm{.}2$ Determine the density $($in ${10}^{-4}$ slugs $\frac{?}{f{t}^3})$ of the helium based on the pressure and temperature

using the ideal gas law.