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Soloha48 [4]
4 years ago
15

The U.S. Energy Information Administration (US EIA) reported that the average price for a gallon of regular gasoline is $3.94 (U

S EIA website, April 6, 2012). The US EIA updates its estimates of average gas prices on a weekly basis. Assume the standard deviation is $0.25 for the price of a gallon of regular gasoline and recommend the appropriate sample size for the US EIA to use if they wish to report a desired margin of error of $0.05 at 95% confidence.
a. The desired margin of error is $.10.
b. The desired margin of error is $.07.
c. The desired margin of error is $.05.
Mathematics
1 answer:
ElenaW [278]4 years ago
4 0
I’m going to guess it maybe c idk lol
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The perimeter of a rectangle is 96 feet. Three times the width is 8 less than the length. Find the dimensions of the rectangle.
Roman55 [17]
Width= w
length= (3w-8)

2w+2(3w-8)= 96
2w + 6w -16= 96
8w= 112
8w/8= 112/8
w= 14

width= 14 feet
length= 34 feet

so the dimensions are 14x34 feet
6 0
3 years ago
a. Find the measure of angle A. b. Find the measure of angle CBD. c. Find the measure of AD. d. Find the measure of BC. e. Find
SpyIntel [72]

Answer:

a. m<A = 35°

b. m<CBD = 61°

c. m AD is  sin55 = AD/40     AD = 32.77

d. m BC is sin 29 = 22.94/BC   BC = 47.32

e. m CD is tan 29 = 22.94/CD    CD = 41.38

f. m BD is cos 55 = BD/40    BD = 22.94

Step-by-step explanation:

5 0
4 years ago
Read 2 more answers
12-9+c=12 what value makes the equation true?
ElenaW [278]

Answer: c = 9

Step-by-step explanation:

12-9=3+9=12

3 0
4 years ago
P=(\frac{\sqrt{x} +2}{x-1}+\frac{\sqrt{x}\\ -2}{x-2\sqrt{x} +1} ) : \frac{4x}{(x-1)^{2} }
balandron [24]

The solution to the division of the given surd is: \mathbf{P =\dfrac{(6\sqrt{x}-x^2\sqrt{x}-3x\sqrt{x}+2x+2)(x-1) }{8x}      }

<h3>Division of Surds.</h3>

The division of surds follows a systemic approach whereby we divide the whole numbers separately and the root(s) are being divided by each other.

Given that:

\mathbf{P=(\frac{\sqrt{x} +2}{x-1}+\frac{\sqrt{x}\\ -2}{x-2\sqrt{x} +1} ) : \frac{4x}{(x-1)^{2} }}

i.e.

\mathbf{=\dfrac{(\frac{\sqrt{x} +2}{x-1}+\frac{\sqrt{x}\\ -2}{x-2\sqrt{x} +1} )}{ \frac{4x}{(x-1)^{2} }} }

Using the fraction rule:

\mathbf{\dfrac{a}{\dfrac{b}{c}}= \dfrac{a\times c}{b}}

\mathbf{\implies \dfrac{(\frac{\sqrt{x} +2}{x-1}+\frac{\sqrt{x}\\ -2}{x-2\sqrt{x} +1} )(x-1)^{2}}{4x}} }

By simplification, we have:

\mathbf{  =\dfrac{\dfrac{(6\sqrt{x}-x^2\sqrt{x}-3x\sqrt{x}+2x+2)(x-1) }{2}  }{4x}      }

\mathbf{P =\dfrac{(6\sqrt{x}-x^2\sqrt{x}-3x\sqrt{x}+2x+2)(x-1) }{8x}      }

Learn more about evaluating the division of surds here:

https://brainly.in/question/27942899

#SPJ1

6 0
2 years ago
Which of the following can be used to show that these triangles are congruent?
Mademuasel [1]

Answer:

ASA

Step-by-step explanation:

Angle B side BC and angle C

8 0
3 years ago
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