Answer:
The table C correctly shows the ratio 8:1 for each grade
Step-by-step explanation:
Let
x ----> the number of students
y ----> the number of adults
we know that
![\frac{x}{y}=\frac{8}{1}](https://tex.z-dn.net/?f=%5Cfrac%7Bx%7D%7By%7D%3D%5Cfrac%7B8%7D%7B1%7D)
<u><em>Verify each table</em></u>
Table A
grade 6
![\frac{96}{88}=\frac{8}{1}](https://tex.z-dn.net/?f=%5Cfrac%7B96%7D%7B88%7D%3D%5Cfrac%7B8%7D%7B1%7D)
Multiply in cross
----> is not true
Table B
grade 6
![\frac{96}{104}=\frac{8}{1}](https://tex.z-dn.net/?f=%5Cfrac%7B96%7D%7B104%7D%3D%5Cfrac%7B8%7D%7B1%7D)
Multiply in cross
----> is not true
Table C
<u><em>grade 6</em></u>
\frac{96}{12}=\frac{8}{1}
Multiply in cross
![96(1)=8(12)](https://tex.z-dn.net/?f=96%281%29%3D8%2812%29)
----> is true
<u><em>grade 7</em></u>
![\frac{120}{15}=\frac{8}{1}](https://tex.z-dn.net/?f=%5Cfrac%7B120%7D%7B15%7D%3D%5Cfrac%7B8%7D%7B1%7D)
Multiply in cross
![120(1)=8(15)](https://tex.z-dn.net/?f=120%281%29%3D8%2815%29)
----> is true
<u><em>grade 8</em></u>
\frac{136}{17}=\frac{8}{1}
Multiply in cross
![136(1)=8(17)](https://tex.z-dn.net/?f=136%281%29%3D8%2817%29)
----> is true
therefore
The table C correctly shows the ratio 8:1 for each grade
Table D
<u><em>grade 6</em></u>
![\frac{96}{11}=\frac{8}{1}](https://tex.z-dn.net/?f=%5Cfrac%7B96%7D%7B11%7D%3D%5Cfrac%7B8%7D%7B1%7D)
Multiply in cross
----> is not true
Answer:
drugs
Step-by-step explanation:
Answer:
We are given that The valve was tested on 150 engines and the mean pressure was 7.7 lbs/square inch.
We are also given that the valve was designed to produce a mean pressure of 7.6 lbs/square inch
So,
Null hypothesis:
Alternate hypothesis :
Since n > 30 and population standard deviation is given
So, We will use z test
Formula :
Substitute the values
refer the z table for p value
so, p value is 0.9927
Since it is a two tailed test So, p = 2(1- 0.9927) = 0.0146
α = 0.1
p value< α
So, we reject null hypothesis
Hence There is sufficient evidence at the 0.1 level that the valve does not perform to the specifications
Volume = 5 cm * 10 cm * 2 cm
volume = 100 cm³
massa = 700 g
Densidade = massa / volume
D = 700/100
D = 7 g / cm³
If n is the term number than its 89