A1. How many minutes is the difference between $6.20 \mathrm{~h}$ and $6 \mathrm{~h} 20$ min?
(A) 0
(B) 2
(C) 8
(D) 10
(E) 12
A1. The difference between $6.20 \mathrm{~h}=372 \mathrm{~min}$ and $6 \mathrm{~h} 20 \mathrm{~min}=380 \mathrm{~min}$ is $8 \mathrm{~min}$.