A) 4 price reductions.
B) The maximum predicted sales revenue per customer is $30.25 which occurs with 5 price reductions.
As a matter of interest, the $30 revenue per customer also occurs with 6 price reductions but this happens after reaching the maximum predicted revenue per customer of $30.25.
<span>char max(char number1, char *number2){
if (strcmp(number1, number2) > 0)
return number1;
else
return number2;
}</span>
General Idea:
The relationship between rate(R), distance(D) and time(T) given below:

Applying the concept:
We need to make use of the formula to find Kelly's walking rate before and after her snack

Option A isn't correct because before snack Kelly walking rate is not 4/14 miles per hour.
Option B is <u>Correct,</u> Kelly walking rate after snack is 2 2/3 miles per hour.
Option C isn't correct because it doesn't took Kelly 2 hours longer to walk 1/6 mile than it did for her to walk 1/4 mile. It took 1/112 hour longer.

Option D isn't correct because 2 2/3 miles per hour is slower than 3 1/2 miles per hour.
Conclusion:
Option B is <u>Correct,</u> Kelly walking rate after snack is 2 2/3 miles per hour.
Times 3 plus 2.5 is the pattern, and the next number is 383.5
28÷4=7
so 7<span>deliveries per hour</span>