Respuesta :
The midpoint between 68 and 74 degrees is 71. T is unknown, so unknown minus midpoint is 71-t, but it has to be positive so it's written as | 71-t |. 74-71 = 3 and 71-68= 3, which means the temps CAN NOT fluctuate more than 3 degrees. Using that information, I believe that the correct answer is:
B) | 71-t | [tex] \leq [/tex] 3
B) | 71-t | [tex] \leq [/tex] 3
