Question 903800
gaining speed 8 -4= 4 mph
headstart  4*0.2 =0.8 miles
time to catch up 0.8/4=0.2 hours
time to catch up =12 minutes
alegebraic solution
4(t+0.2)=8t
4t+0.8=8t
0.8=8t-4t
0.8=4t
0.2=t
distance to meeting 0.2*8=1.6 miles