Answer:
$40.99
Step-by-step explanation:
$50 - $9.01 = $40.99
Therefore he will get $40.99 back.
Please mark brainliest!
The answer is (A) 2, hope this helps!
Answer:
Option a) A 95% confidence interval for the mean diameter of the 120 bearings in the sample is
.
Step-by-step explanation:
We are given the following information in the question:
Sample size, n = 120
Sample mean = 10 mm
Standard Deviation = 0.24 mm
Formula:
![\mu \pm z_{critical}\frac{\sigma}{\sqrt{n}}](https://tex.z-dn.net/?f=%5Cmu%20%5Cpm%20z_%7Bcritical%7D%5Cfrac%7B%5Csigma%7D%7B%5Csqrt%7Bn%7D%7D)
![z_{critical}\text{ at}~\alpha_{0.05} = 1.96](https://tex.z-dn.net/?f=z_%7Bcritical%7D%5Ctext%7B%20at%7D~%5Calpha_%7B0.05%7D%20%3D%201.96)
![10 \pm 1.96\displaystyle\frac{0.24}{\sqrt{120}}](https://tex.z-dn.net/?f=10%20%5Cpm%201.96%5Cdisplaystyle%5Cfrac%7B0.24%7D%7B%5Csqrt%7B120%7D%7D)
Hence, the correct interpretation for the confidence interval is given by option a).
A 95% confidence interval for the mean diameter of the 120 bearings in the sample is
.
We have to consider the factor of sampling of 120 ball bearings from a population of 10,000 ball bearings.
12v + 3b = 243
4v + 4b = 204....multiply by -3
-------------------
12v + 3b = 243
-12v - 12b = - 612 (result of multiplying by -3)
-------------------add
-9b = - 369
b = -369/-9
b = 41 <=== each bus holds 41 students
4v + 4b = 204
4v + 4(41) = 204
4v + 164 = 204
4v = 204 - 164
4v = 40
v = 40/4
v = 10 <== each van holds 10 students
IS THERE ANY ANSWER CHOICES