Answer:
Value of z-score is -1.5
Option C is correct.
Step-by-step explanation:
We are given
Mean = 2500 hrs
Standard Deviation = 20 hours
X = 2470
We need to find z-score
The formula used to calculate z-score is: ![z-score=\frac{x-\mu}{\sigma} \\](https://tex.z-dn.net/?f=z-score%3D%5Cfrac%7Bx-%5Cmu%7D%7B%5Csigma%7D%20%5C%5C)
Putting values of x, mean and standard deviation in the formula
![z-score=\frac{x-\mu}{\sigma} \\z-score=\frac{2470-2500}{20} \\z-score=-1.5](https://tex.z-dn.net/?f=z-score%3D%5Cfrac%7Bx-%5Cmu%7D%7B%5Csigma%7D%20%5C%5Cz-score%3D%5Cfrac%7B2470-2500%7D%7B20%7D%20%5C%5Cz-score%3D-1.5)
So, value of z-score is -1.5
Option C is correct.
Answer:
Step-by-step explanation:
There are no solutions. The slopes of both lines are the same so they are parallel: they will never intersect. Therefore, there cannot be a solution.
HOPE THIS HELPS AND HAPPY HOLIDAYss
Answer:
20cm is the area of the shaded triangle
920
18 rounded is 20 as the second number is the ten
Gradient, m=(2-0)/(10-0)=1/5
At (10,2), 2=1/5(10)+b
b=0
Equation: y=1/5 x
Hope this can help.