Answer:
6 hours
Step-by-step explanation:
10/2=5
5 * 6 =30
the original cost was $111.60.
Answer:
the answer is DBC=90°
because the midpoint of the perimeter of quadrilateral is B
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