distance=rate times time
d=rt
so, they have to cover 250 total miles
a.
30mph and t=time
distance=30t=distance it wil travel
d.
travels 3 times t or 3t
c.
draw a diagram with 2 ships 250 miles apart, one going 30 and the other going 3mph
not to scale
d.
total distance=distance of rescueship+disabledship=30t+3t=33t
e.
when will total distance=distance apart=250?
250=33t
divide both sides by 33
7.5757575757575757575757575757576=t
so after about 7.6 hours
