Prob. $1\mathrm{.}7\mathrm{.}16$ p$.$ IP$-8[$Ans: $1\mathrm{.}06].$

$1\mathrm{.}7\mathrm{.}16$ WP An important dimensionless parameter concerned with very high$-$speed flow is the Mach number, defined as $\frac{V}{c},$ where $V$ is the speed of the object such as an airplane or projectile, and $c$ is the speed of sound in the fluid surrounding the object. For a projectile traveling at $800mph$ through air at $50F$ and standard atmospheric pressure, what is the value of the Mach number?