What is the area of the shaded region between the two z-scores indicated in the standard normal curve shown below?
Z=-1.26
z=0.86
A. 0.45
B. 0.7113
C. 0.7013
D. 2.05

Sanya noticed that the temperature was falling at a steady rate of 1.4 degrees every hour from the time that she first checked her outdoor thermometer. by 6 a.m., the temperature had fallen 21 degrees. which expression can you use to find how many hours earlier she had first checked the thermometer?