Answer:
5b; when b=3.4 the distance Sandra rode is 17 miles.
Explanation:
Given that:
Sandra rode her bike 5 times as many as miles as Barbara.
It means that 5 will be multiplied by the distance rode by Barbara.
Distance by Sandra = 5b
When b=3.4 miles
Distance by Sandra = 5(3.4)
Distance by Sandra = 17 miles
Hence,
5b; when b=3.4 the distance Sandra rode is 17 miles.