Answer:
90min
Step-by-step explanation:
we can solve the first part by means of the rule of three:
5.3miles ----2.5 hour
3.18miles----x
then

Now we must convert hours to minutes:
1.5 hours = 1.5hours (1)
1.5 hours =1.5 hours 
1.5 hours =(1.5)(60) min
1,.5 hours =90min
Answer:
<em>The researchers documented 145 medicinal plants that the healers use for treating 59 ailments. They also found that the ethnic group used more than 40 species for treating more than one ailment.</em>

Range I think I may be wrong ?