The zeroes are (0,8) and (0,9)
Use the zero product property to find this
(x-8)=0
x=8
(x-9)=0
x=9
Answer: <u>Last option</u>

Step-by-step explanation:
The z-scores give us information about how many standard deviations from the mean the data are. This difference can be negative, if the data are n deviations to the left of the mean, or it can be positive if the data are n deviations to the right of the mean.
To calculate the Z scores, we calculate the difference between the value of the data and the mean and then divide this difference by the standard deviation.
so
.
Where x is the value of the data, μ is the mean and σ is the standard deviation
In this case
:
μ = 12 $/h
= 2 $/h
We need to calculate the Z-scores for
and 
Then for
:
.
Then for
:
.
Therefore the answer is:

Notice that

so the constraint is a set of two lines,

and only the first line passes through the first quadrant.
The distance between any point
in the plane is
, but we know that
and
share the same critical points, so we need only worry about minimizing
. The Lagrangian for this problem is then

with partial derivatives (set equal to 0)



We have

which tells us that

so that
is a critical point. The Hessian for the target function
is

which is positive definite for all
, so the critical point is the site of a minimum. The minimum distance itself (which we don't seem to care about for this problem, but we might as well state it) is
.
Answer:
17
Step-by-step explanation: