Half the gas in the tank was used when
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Given:
Perimeter of a rectangular paper = 22 inches.
Area of the rectangular paper = 28 square inches.
To find:
The dimensions of the rectangular paper.
Solution:
Let l be the length and w be the width of the rectangular paper.
Perimeter of a rectangle is:
Perimeter of a rectangular paper is 22 inches.
...(i)
Area of a rectangle is:
Area of the rectangular paper is 28 square inches.
Using (i), we get
Splitting the middle term, we get
Using zero product property, we get
If , then by using (i)
If , then by using (i)
Therefore, the dimensions of the paper are either or
.
Using the normal distribution, it is found that:
a) Her waist is at the 2.74th percentile.
b) 99.86% of female soldiers requires custom uniform pants.
<h3>Normal Probability Distribution</h3>The z-score of a measure X of a normally distributed variable with mean and standard deviation
is given by:
- The z-score measures how many standard deviations the measure is above or below the mean.
- Looking at the z-score table, the p-value associated with this z-score is found, which is the percentile of X.
The mean and the standard deviation are given, respectively, by:
.
Item a:
The percentile is the <u>p-value of Z when X = 26.1,</u> hence:
Z = -1.92
Z = -1.92 has a p-value 0.0274 = 2.74th percentile.
Item b:
The proportion is the <u>p-value of Z when X = 32 subtracted by the p-value of Z when X = 24</u>, hence:
X = 32:
Z = 3.
Z = 3 has a p-value 0.9987.
X = 24:
Z = -3.67.
Z = -3.67 has a p-value 0.0001.
0.9987 - 0.0001 = 0.9986 = 99.86% of female soldiers requires custom uniform pants.
More can be learned about the normal distribution at brainly.com/question/25800303
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