16
28-12=16
He needs 16 more hours of work to complete
The cost of six filters is 29.94 since each filter costs 4.99
Given:
The variance of a distribution = 195.
To find:
The standard deviation, rounded to the nearest thousandth.
Solution:
Standard deviation of a distribution is the square root of the variance of the distribution.
Here, the standard deviation of the distribution is
Therefore, the standard deviation is 13.964.
I think it’s C, good luck