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Daniel [21]
3 years ago
15

In 2012, there were approximately 8,950 public libraries in the United States. A survey found that 76% of those libraries offere

d free access to electronic books. Based on this information, how many public libraries offered free access to electronic books in 2012?
Mathematics
2 answers:
yarga [219]3 years ago
8 0
The answer is 6,802.




Bess [88]3 years ago
4 0

Answer:

6,802

Step-by-step explanation:

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I don't know we don't have this at my school
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Which of the following mathematical symbols represents "the opposite of"?
asambeis [7]

Answer:

the minus sign

Step-by-step explanation:

In mathematics, the symbol for the additive opposite is the minus sign

The symbol for the multiplicative opposite is the inverse operation 1/x (I think)

So, yes, specific opposites have symbols, BUT...

Just saying "the opposite of" is too blurry to find one word that represents that.

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A rectangular playground is surrounded by a chain link fence that costs $2 per linear foot on three sides and a fancier wooden f
NARA [144]

Answer:

31.6 feet by 15.8 feet.

Step-by-step explanation:

Area of a Rectangle = Length X Breadth = LB

The area of the playground is to be 500 square feet

Therefore:

LB=500

Perimeter of the Rectangle = 2(L+B)

The Chain link fence that costs $2 per linear foot on three sides and a fancier wooden fence that costs $6 per linear foot on the fourth side.

Cost = ${2(L+2B)+6L}=2L+4B+6L=8L+4B

Cost= $(8L+4B)

From: LB=500, B=500/L

Substitute B into 8L+4B

C(L) = 8L+4(\frac{500}{L} )=8L+\frac{2000}{L} =\frac{8L^2+2000}{L}

C(L)=\frac{8L^2+2000}{L}

The minimum cost of the fencing occurs when the dimensions are minimum.

If we take the derivative of C(L)

C^{'}(L)=\frac{8L^2-2000}{L^2}

At C^{'}(L)=0

\frac{8L^2-2000}{L^2}=0\\8L^2-2000=0\\8L^2=2000\\L^2=250\\L=15.8 ft

Recall: B=500/L

B=\frac{500}{15.8}=31.6 ft

The dimensions that minimizes the total cost of the fencing are 31.6 feet by 15.8 feet.

4 0
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Will give Brainliest!!!
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Answer:

5 x T = L

Step-by-step explanation:

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y ≥ 3

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