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Vika [28.1K]
4 years ago
8

Paul plans to put concrete on a rectangular portion of his driveway. The portion is 12 feet long and six inches high. The price

of concrete is $98 per cubic yard. The total cost of the concrete Paul needs is $108.89. Which of the following is closest to the width of the portion of the driveway on which Paul plans to put concrete?
[1 foot = 12 inches; 1 yard = 3 feet]

a) 3 feet
b) 5 feet
c) 8 feet
d) 10 feet
Mathematics
2 answers:
hammer [34]4 years ago
8 0
The answer would be B I took the test right now and got 100%
coldgirl [10]4 years ago
3 0
The width needed would be 5 feet, so B. 
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3 years ago
Calculate the sample standard deviation of data from Question 1<br> 76,45,64,80,92
mash [69]

Answer:

S.D = 15.98

Step-by-step explanation:

Given: 76,45,64,80,92

Required: Determine the standard deviation

We start by calculating the mean

Mean = \frac {\sum x}{n}

Where x-> 76,45,64,80,92 and n = 5

Mean = \frac {76+45+64+80+92}{5}

Mean = \frac{357}{5}

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Subtract Mean (71.4) from each of the given data

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Determine the absolute value of the above result

|4.6| = 4.6\\|-26.5| = 26.5\\|-7.4| = 7.4\\|8.6| = 8.6\\|20.6| = 20.6

Square Individual Result

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Hence, Variance = 255.298

Standard Deviation is calculated by \sqrt{Var}

SD = \sqrt{255.298}

S.D = 15.9780474402

S.D = 15.98 (Approximated)

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