Suppose That the Distribution of Heart Rates for Medium-Sized Dogs

Multiple Choice

Suppose that the distribution of heart rates for medium-sized dogs is Normally distributed with mean 115 beats per minute and standard deviation 18 beats per minute.
Stacy learns from the veterinarian that dogs with heart rates in the upper 8% may be in danger of heart failure. For medium-sized dogs, a dangerous heart rate would be one above what value?

A) 79
B) 189.8
C) 140.2
D) 151.2
E) 169