I perfer the the gx are square root of the output
The answer is (-2,3)
hope you have a great day ;)
Answer:
0.1469
Step-by-step explanation:
Given from the question;
Mean=8.4 hrs=μ
Standard deviation=1.8 hrs=δ
Sample size, n=40
Let x=8.7
z=(x-μ)÷(δ÷√n)
Find z(8.7)
z=(8.7-8.4)÷(1.8÷√40)
z={0.3×√40}÷1.8=1.05409
z=1.0541
Read from the standard normal probabilities table
P(z>1.0541)
=0.1459
The answer u are looking for is 30
Start with
![\dfrac{5(n+4)}{3} = n-8](https://tex.z-dn.net/?f=%20%5Cdfrac%7B5%28n%2B4%29%7D%7B3%7D%20%3D%20n-8%20)
Multiply both sides by 3:
![5(n+4) = 3(n-8)](https://tex.z-dn.net/?f=%205%28n%2B4%29%20%3D%203%28n-8%29%20)
Expand both sides:
![5n+20 = 3n-24](https://tex.z-dn.net/?f=%205n%2B20%20%3D%203n-24%20)
Subtract
from both sides:
![2n+20 = -24](https://tex.z-dn.net/?f=%202n%2B20%20%3D%20-24%20)
Subtract 20 from both sides:
![2n = -44](https://tex.z-dn.net/?f=%202n%20%3D%20-44%20)
Divide both sides by 2:
![n = -22](https://tex.z-dn.net/?f=%20n%20%3D%20-22%20)