Answer:
609
Step-by-step explanation:
Standard deviation = 
= $30
Margin of error = E = $2
Confidence level = 90%
Since the distribution is said to be normal, we will use z scores to solve this problem.
The z score for 90% confidence level = z = 1.645
Sample size= n = ?
The formula to calculate the margin of error is:
Using the values in above equation, we get:
This means, the minimum number of observations required is 609
Answer:
It will take him 24 minutes
Step-by-step explanation:
If it takes him 4 for minutes to run 1/2 mile, then it will most likely take him 8 minutes for 1 mile. Then you multiply 8 by 3, which gives you 24
Answer:
the answer is reflection
Step-by-step explanation:
i took edg
The formula is length*width*height. Your answer is 105 inches
Answer:
Vertical angles are congruent, so L3 = 37 degrees, and L4 = 143 degrees.
Let me know if this helps!
