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3 years ago

13

People were polled on how many books they read the previous year. How many subjects are needed to estimate the number of books r

ead the previous year within one book with 99% confidence? Initial survey results indicate that sigmaequals12.4 books.

1 answer:

Dmitry_Shevchenko [17]3 years ago

8 0

n = [z*s/E]^2

n = [2.5758*14.1/1]^2 = 1320 (rounded up)

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Find the unit rate for number of parts manufactured per hour if 1116 parts are made in 7 hours. Round to the nearest integer

valentinak56 [21]

It would be 159 parts. This is because 1116/7 is 159.42 and technically a part can only be a whole number. So it would be 159 parts.

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3 years ago

write the slope intercept equation. the graph of f passes through (-6,4) and is perpendicular to the line that has an x-intercep

Nimfa-mama [501]

Answer:

y = $-\frac{1}{3} x$ + 2

Step-by-step explanation:

The slope of the line that has an x intercept of (2,0) and y-intercept of (0,-6) is:

Slope(s) = Change in y ÷ change in x

s = $\frac{0 - -6}{2 - 0}$ = 3

The slope of the perpendicular line to this line with slope of 3 has to have a slope of -1 ÷ 3 = $-\frac{1}{3}$

Reason: The product of slopes of lines perpendicular to each other have to be -1

So the slope of the perpendicular line that passes through (-6,4) is $-\frac{1}{3}$

As mentioned earlier, we derive a slope of a line by dividing the change in y by the change in x

Taking another point (x,y) on the line,

$-\frac{1}{3}$ = $\frac{y - 4}{x - -6}$

$-\frac{1}{3}$ = $\frac{y - 4}{x + 6}$

y - 4 = $-\frac{1}{3}$ x - 2

y = $-\frac{1}{3}$ x + 2

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2 years ago

1 15/100 + 1/50 +1.175=

grin007 [14]

$1\frac{15}{100}+\frac{1}{50}+1.175 =\frac{115}{100}+\frac{1}{50}+1.175 =\frac{23}{20}+\frac{1}{50}+1.175 =\frac{115}{100}+\frac{2}{100} =\frac{115}{100}+\frac{2}{100} =\frac{115+2}{100} =1.175+\frac{117}{100} =1.175+1.17 =2.345$

<h3><em>You can write </em> $2.345$ <em> or </em> $2\frac{69}{200}$ <em></em></h3><h3><em></em></h3><h3><em>Hope I helped you!</em></h3><h3><em>Success!</em></h3>

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2 years ago

558 cups of water fill 412 identical water bottles. How many cups fill each bottle ?

Elan Coil [88]

Answer:

5/4 cups fill each bottle

Step-by-step explanation:

5 5/8=45/8

4 1/2=9/2

Step by Step:

------------------

(45/8)/(9/2)

(45/8)(2/9)

(45/4)(1/9)

45/36

5/4

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3 years ago

Make r the subject of the formula:<br> U=v+2t

bearhunter [10]

U=v+ 2t=
U/2t = r+2t/2t
=U/2t=r OR. r= U/2t

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3 years ago