Answer:
d. 90 cm, 1.2 cm
Step-by-step explanation:
Given that:
The sample size n = 36
For the length of the link:
The mean
= 2.5
The standard deviation s = 0.2 cm
In a chosen 36 links, The mean and standard deviation for the length chain is as follows:
Mean = n
Mean = 36×2.5
Mean = 90 cm
The Standard deviation = s×√n
The Standard deviation = 0.2×√36
The Standard deviation = 0.2×6
The Standard deviation = 1.2 cm
First you add seven to both sides to 2/3x - 7 = 11 will be 2/3x = 18 then you divide by 2/3 on both sides to get x by itself so 2/3x = 18 and x will be 1/27 in fraction form
C, this class is really hard, if u need tutoring contact me
0.01689
There is a longer answer but if your doing homework just write that