Solve Write the Answer in Simplest Form $\frac { 3 } { 10 }$

Solve. Write the answer in simplest form.
-Marty joggeded $\frac { 3 } { 10 }$ of a mile from home and then rested. Then he continued jogging another $\frac { 6 } { 10 }$ of a of a mile until he discovered his watch had fallen off. He walked back along the same path forpath for $\frac { 4 } { 10 }$ of a mile un of a mile until he found his
Watch. Find how far he was from his starting point.

A) $\frac { 5 } { 10 } \mathrm { mi }$
B) $\frac { 1 } { 2 } \mathrm { mi }$
C) $\frac { 1 } { 10 } \mathrm { mi }$
D) $\frac { 13 } { 10 } \mathrm { mi }$