Answer:
either -8 6/7 or about -8.86
Step-by-step explanation:
Answer: k=3
Step-by-step explanation:
33/99 divide top and bottom by 11
33/99divided by 11/11
=3/9
Answer:
4 > x/2.1
Step-by-step explanation:
4 cannot be less than anything, so the inequality sign has to be "eating" the 4.
4 > ?
The quotient of a number x and 2.1 is simply saying division
4 > x/2.1
Answer:
The surface area of a sphere of radius r is 4 π r2. Half of this is 2 π r2. If this is what is meant by the surface area of a hemisphere then 2 π r2 = 1062.
Step-by-step explanation:
Answer:
See below for answers and explanations
Step-by-step explanation:
<u>Part A</u>
Assuming that conditions have been met for the interval, we use the formula 
where 
represents the sample mean, 
represents the critical value, 
represents the sample standard deviation, and 
is the sample size.
The critical value of for an 80% confidence level with degrees of freedom 
is equivalent to 
Thus, we can compute the confidence interval:
Therefore, we are 80% confident that the true mean age of all customers is between 30.17 and 35.11 years.
<u>Part B</u>
The margin of error is 
