Answer:
Her speed in miles per hour is 7.5miles pee hour
Explanation:
Speed is defined as the change in distance of a body or an object with respect to time. Mathematically;
Speed = Distance/Time
Given distance = 3/4miles
Time = 1/10hour
Substituting this data's given in the formula for calculating speed gives;
Speed = {3/4}/{1/10}
Speed = 3/4× 10/1
Speed = 30/4
Speed = 7.5miles/hour