Answer:
30.128 days
Explanation:
Given that:
Mean = 25
Standard deviation = 4
Confidence interval = 90% = 0.9
Since the confidence interval should not exceed 90%
Then using z test table
P(z) = 0.9
For 0.8997 , we get = 1.28
For 0.9015, we get = 1.29
∴
By solving
Z = 1.282
Thus, the duration to be used so that it will not exceed 90% C.I is:
Z = (x - μ)/σ
1.282= ( x - 25)/4
1.282 * 4 = x - 25
(1.282*4)+25 = x
x = 30.128 days
Answer:
I think it is B: Cylinder and Cone sorry if im wrong
Explanation:
Answer:
0.864 m/s
Explanation:
We calculate using this formula
Q = A/v
We make v subject of the formula
v = Q/A
Q = volume of flow
A = area
The metric based sizes for dimensions of steel and copper tubing has that at 25mm OD x 1.5
A = 3.801x10^-4
Q has been given as 19.7L/min of oil
When we put these into the formula
V = [19.7 x 1/60000]/3.801x10^-4
= 0.000328333/0.0003801
= 0.8638 m/s
Approximately 0.864
A Structural Engineer build bridges, buildings, dams, tunnels, tanks, power plants, transmission line towers and space satellites.
<h3>Who is a Structural Engineer ?</h3>
A Structural Engineer can be defined as a professional who has been trained and licensed to analyze, plan and build different structures such as:
This ultimately implies that, the building of bridges, buildings, dams, tunnels, tanks, power plants, transmission line towers and space satellites are done by Structural Engineers.
Read more on Structural Engineer here: brainly.com/question/18699491
#SPJ12
Answer:
The detailed answer can be found in pictures.
Explanation:
See attached pictures.