Answer:
Erik's average speed exceeds the speed limit by 6.91 miles per hour.
Step-by-step explanation:
Let suppose that Erik travels at constant speed. Hence, the speed ([tex]v[/tex]), measured in miles per hour, is determined by following equation of motion:
[tex]v = \frac{s}{t}[/tex] (1)
Where:
[tex]s[/tex] - Distance, measured in miles.
[tex]t[/tex] - Time, measured in hours.
Please notice that a hour equals 60 minutes. If we know that [tex]s = 19.2\,mi[/tex] and [tex]t = 0.267\,h[/tex], then the speed of Erik is:
[tex]v = \frac{19.2\,mi}{0.267\,h}[/tex]
[tex]v = 71.910\,\frac{mi}{h}[/tex]
Which is 6.91 miles per hour above the speed limit.
