Solve the Problem $a _ { n } = 13 + 6 n$

Multiple Choice

Solve the problem.
-To train for a race, Will begins by jogging 13 minutes one day per week. He increases his jogging time by 6 minutes each week. Write the general term of this arithmetic sequence, and find how many weeks it takes for him to reach a jogging time of one hour.

A) $a _ { n } = 13 + 6 n$ ; 8 weeks
B) $a _ { n } = 13 + 6 n$ ; 7 weeks
C) $a _ { n } = 7 + 6 n$ ; 7 weeks
D) $a _ { n } = 7 + 6 n$ ; 8 weeks