48. On call = 3.5 hours for 10 dollars
=> ½ hour for 1.25 dollars.
Now, let’s solve the unit rate for each company
first = 3.5 hour / 10 dollars
=> 10 / 3.5
=> Unit rate is 2.9 dollars/hr
Second company = ½ hour for 1.25 dollars
=> 1.25 / .5
=> 0.25 dollars / hr.
Thus, the first company pays better than the second one because it pays 2.9 dollars every hour of talk compare to the 2nd one which pays only 0.25 dollars per hr.
