Hi there!
If you solve for

in this problem you would end up with a result of

. To find

you need do the following:
First, subtract 11.45 from both sides:


Next, divide both sides by -1.2:

To get the end result of:

-Your friend, ASIAX
Answer:
It is the 1st answer.
Step-by-step explanation:
Answer:
a. 13.7084 oz.
Step-by-step explanation:
Formula for Lower Control Limit =
(LCL = x-bar - A²R-bar)
x - bar = 14 oz
A2 = 0.729
R - bar = 0.4 oz
= 14 - 0.729 × 0.4
= 14 - 0.2916
= 13.7084oz