Answer:
57
Step-by-step explanation:
Answer:
A
Step-by-step explanation:
7x20c=140c, 7x4=28, 7x-2c=-14c
140c+28-14c
We Know, perimeter of square = 4a
Area of square = a²
Now, A.T.Q,
8*4a = a²
32a = a²
a²/a = 32
a = 32
So, side should be 32
Hope this helps!
Answer:
---- sample standard deviation
---- sample variance
Step-by-step explanation:
Solving (a): The sample variance
First, we calculate the midpoint of each class (this is the average of the limits)
So, we have:


And so on
So, the table becomes:

Calculate the mean




The variance is:

So, we have:



The sample standard deviation is:



Solving (b): The sample variance
In (a), we calculate the sample variance to be:

F[c(p)] = 0.81p. I hope this helps :) Please give me a rate and thanks :P