Clarence works at least 5 hours but not more than 7 hours. He earns $11.60 per hour. The function f(t)=11.6tf(t)=11.6t represents the amount of money he earns for working t hours.
What is the practical range of the function?
A: all multiples of 11.6 between 58 and 81.2, inclusive
B: all real numbers from 5 to 7, inclusive
C: all real numbers
D: all real numbers from 58 to 81.2, inclusive
