Answer:
-2
Step-by-step explanation:
I mean i use the slope formula 
and you just plug in the values of the coordinates.
In the first 3 days, I think that Juanita will ride 12500? I'm not sure if that is right but I think it is.
The mean is the average of a set of numbers, to find the mean, add all the numbers, then divide by the amount of numbers.
We know that
3600 seconds = 1 hour
Then
3400 seconds = 3400/3600
= 17/18 hours
5280 feet = 1 mile
Then
63360 feet = 63360/5280 mile
= 12 mile
So
Distance covered by Nina in 17/18 hours = 12 mile
Then
Distance covered by Nina in 1 hour = 12/(17/18) miles
= 12.71 miles.
From the above deduction, we can conclude that the speed of Nina is 12.71 miles per hour.
Speed of Sophia is 10 miles per hour. So Nina is the girl that rides at a faster speed.
The answer to your problem is 3^1..
