Answer:
Here is the code for you: 
 
function distanceMiles = CalculateDistance(timeHours, rateKPH) 
 
%timeHours: Time in hours 
 
%rateKPH: Rate in kilometers 
 
rateMPH = KilometersToMiles(rateKPH); %Call KilometersToMiles function(below) to assign 
 
%rateMPH with the corresponding speed in miles per 
 
%hour 
 
distanceMiles = rateMPH * timeHours; 
 
end 
 
function milesValue = KilometersToMiles(KilometersValue) 
 
milesValue = KilometersValue * 0.6213712; 
 
end 
 
And the output screenshot is: [Attached]