Answer: 0.6827
Step-by-step explanation:
Given : Mean IQ score : 
Standard deviation : 
We assume that adults have IQ scores that are normally distributed .
Let x be the random variable that represents the IQ score of adults .
z-score : 
For x= 90

For x= 120

By using the standard normal distribution table , we have
The p-value : 

Hence, the probability that a randomly selected adult has an IQ between 90 and 120 =0.6827
Answer:
a) the beef cost the most
b) $125.8
Step-by-step explanation:
A) 1.2 potatoes
1.8 carrots
2.39 beef
.5 peppers
B) 15.30-.5=14.80 x 8.5=<u>125.8</u>
An irrational number is one with a fraction.
Answer:
2cm
Step-by-step explanation: