Answer: it is 65%
Step-by-step explanation:
Answer: 86.64%
Step-by-step explanation:
Let x be a random variable that represents the diameter of metal samples.
Given : Population mean : 
Standard deviation: 
Specified tolerance on the diameter is 0.75 mm.
i.e. range of diameter = 10-0.75< x <10+0.75 = 9.25< x< 10.75
Formula to find the z-score corresponds to x: 
At x= 0.75, 

Using standard normal table for z-value,
P-value : 
∴ Percentage of samples manufactured using this process satisfy the tolerance specification = 86.64%
$3 for 25 minutes, 3 divided by 25
3 : 25 = 0.12 : 1
Therefore, you get paid $0.12 per minute
2x+2y=12.........&
6x-2y=20.........$
&+$: 8x=32
x=4
2*4+2y=12
y=4