The answer would be the first option!!
Answer:
57
Step-by-step explanation:
I prefer the equation in this format

substitute -4 for m and 6 for n

square the 6 then multiply by 2

solve inside the absolute value then multiply by 3


divide by 4

Answer: 0.5467
Step-by-step explanation:
We assume that the test scores for adults are normally distributed with
Mean : 
Standard deviation : 
Sample size : = 50
Let x be the random variable that represents the IQ test scores for adults.
Z-score : 
For x =85

For x =115

By using standard normal distribution table , the probability the mean of the sample is between 95 and 105 :-

Hence, the probability that a randomly selected adult has an IQ between 85 and 115 =0.5467
18 because 6=22. 12=44. 18=66