2/-3 *n+7/3
-2n/3+7/3
-2n/3 +3*7/3/3
-2n+3*7/3/3
-2n+7/3
So A
Answer:
41 feet
144+144= 288
Square root of 288 is approximately 17
17+12+12=41
1 kilometer is 1000 (or 10^3) meters, so Eric walks .81*10^3=810 meters and YiTing walks .65*10^3=650 meters.