Answer:
d=65t Joseph travels 520 miles
Explanation:
We are given that the distance, d, Joseph drives varies directly to the time, t. This means
d=k⋅t
for some constant, k. Since he travels 325 miles in 5 hours, we substitute these values into the formula for direct variation to find
325=k⋅5
Dividing by 5 gives k=65, so an equation that relates d and t is
d=65t
Substituting t=8 seconds yields
65(8)=520
so Joseph can travel 520 miles in 8 hours.