To convert the speed from miles per hour to miles per minute, we need to determine how many minutes are in one hour.
The expression given is:
[tex]\[
\frac{50 \text { miles }}{1 \text { hour }} \times \frac{1 \text { hour }}{\square \text { minutes }}
\][/tex]
Knowing there are 60 minutes in an hour, we substitute this value into the box. Thus, the correct conversion would be:
[tex]\[
\frac{50 \text { miles }}{1 \text { hour }} \times \frac{1 \text { hour }}{60 \text { minutes }} = \frac{50 \text { miles }}{60 \text { minutes }}
\][/tex]
So, the value that should be entered in the box to correctly complete the conversion is:
[tex]\[
60
\][/tex]
