14 * 9000
---
9
126000
-----------
9
=14000
Answer:
The margin of error for the confidence interval is of 0.08 = 8%.
Step-by-step explanation:
A confidence interval has two bounds, an upper bound and a lower bound. The margin of error is half the subtraction between these two bounds.
In this question:
Lower bound: 0.5
Upper bound: 0.66
Margin of error: (0.66 - 0.5)/2 = 0.16/2 = 0.08
The margin of error for the confidence interval is of 0.08 = 8%.
Bob has 27 books.
Charles has two thirds as many books as Bob.
![27 \times \frac{2}{3}=9 \times 2=18](https://tex.z-dn.net/?f=27%20%5Ctimes%20%5Cfrac%7B2%7D%7B3%7D%3D9%20%5Ctimes%202%3D18)
Charles has 18 books.
Jim has three times as many books as Charles.
![18 \times 3=54](https://tex.z-dn.net/?f=18%20%5Ctimes%203%3D54)
Jim has 54 comic books.
Step-by-step explanation:
The midline is the average of the lowest point and the highest point.
y = (4 + 6) / 2
y = 5
The amplitude is the distance from the midline to the lowest/highest point:
a = 5 − 4 = 1, or a = 6 − 5 = 1
It's also half the distance between the lowest point and the highest point:
a = (6 − 4) / 2
a = 1
The period is the time it takes to complete a full cycle, so the period is 12 hours.
Answer:
3 min per lap
Step-by-step explanation:
15 (minutes)/5 (lap)= 3 minutes