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Aleonysh [2.5K]
3 years ago
7

13. A contractor buys 8.2 square feet of sheet metal.

Mathematics
1 answer:
Veseljchak [2.6K]3 years ago
6 0

Answer:

x = \frac{183}{6.7}  is the required equation.

The  Per sq ft of sheet costs $ 27.31.

Step-by-step explanation:

The total amount of sheet purchased =  8.8 sq. ft

The amount of sheet used = 2. 1 sq ft.

The worth of remaining sheet = $183

Let us assume the  cost per sq ft of sheet = $x

Now, the remaining sheet =

Amount of total sheet purchased- Amount of sheet used

= 8.8 sq. ft - 2. 1 sq ft. = 6. 7 sq. ft

So, the worth of the remaining sheet 6.7 sq ft is $183.

⇒ Worth of 1 sq ft of sheet = $183 /6.7 sq ft

or, x = \frac{183}{6.7}  = 27.31

or  x = $27.31

Hence, the  Per sq ft of sheet costs $ 27.31.

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Answer:

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Step-by-step explanation:

Given a binomial experiment with n trials and probability of success​ p,

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Representing k=x-1 in the above gives us:

E(X)=np\sum_{k=0}^{n}n\left(\begin{array}{c}n-1\\k\end{array}\right)p^{k}(1-p)^{(n-1)-k}

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