Two samples probably will have different means even if they are both the same size and they are both selected from the same population.

True.

Step-by-step explanation:

Yes the probability of getting the same mean  will be low especially  for very large  populations.

to find the perimeter of the rectangle this is the expression:

x-9+x-9+3x-4+3x-4=138

if we simplify it:

8x-26=138

remember, 138 is what it all adds up to

the length is 11.5cm

the width is 57.5cm

the area is 661.25cm^2

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