Answer:
44
Step-by-step explanation:
Considering the situation described, the appropriate null hypothesis is given by:

<h3>What are the hypothesis tested?</h3>
At the null hypothesis, it is tested if the proportion is the expected one, that is, of 9%, hence:

At the alternative hypothesis, it is tested if there is enough evidence to conclude that the proportion is above 9%, hence:
.
More can be learned about an hypothesis test at brainly.com/question/26454209
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A 8
If width is x, then length is 3x
x+x+3x+3x = 8x= 64, then x=8 m