Answer
a.) 12
b.) 5280
Work Step by Step
a.) 1 ft = 12 inches (in.).
According to US Measurement Unit Relationships, Length Units 1 ft = 12 inches (in.).
b.) 5280 feet (ft) = 1 mile(mi)
According to US Measurement Unit Relationships, Length Units 5280 feet (ft) = 1 mile (mi)