Answer:
d= 4
Step-by-step explanation:
The DISTANCE between the two points can be found by the distance formula
d^2 = (x1-x2)^2 + (y1-y2)^2
( 1-5)^2 + (2-2)^2
= 16
d = 4
You can just LOOK and realize the two points have the same y values...so the distance is just the distance between the x coordinates 5 -1 = 4
Answer:
1385.44
Step-by-step explanation:
Use the formula for the area of a circle. A = 
The expression to answer the question is 785 - 570 + 595.
785 - 570 + 595 = 810
Hopefully I could help. ;)
Answer:
25
Step-by-step explanation:
Answer:
The 99% confidence interval for the population mean reduction in anxiety was (1.2, 8.6).
Step-by-step explanation:
We have the standard deviation for the sample, which means that the t-distribution is used to solve this question.
The first step to solve this problem is finding how many degrees of freedom, we have. This is the sample size subtracted by 1. So
df = 27 - 1 = 26
99% confidence interval
Now, we have to find a value of T, which is found looking at the t table, with 26 degrees of freedom(y-axis) and a confidence level of
. So we have T = 2.7787.
The margin of error is:

In which s is the standard deviation of the sample and n is the size of the sample.
The lower end of the interval is the sample mean subtracted by M. So it is 4.9 - 3.7 = 1.2.
The upper end of the interval is the sample mean added to M. So it is 4.9 + 3.7 = 8.6.
The 99% confidence interval for the population mean reduction in anxiety was (1.2, 8.6).