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3 years ago

6

A rope is cut into three pieces P, Q, and R the lengths of the pieces are in the ratio 3:5:7 if the rope is 33 feet 9 inches, fi

nd the lengths of P, Q, R

1 answer:

Olin [163]3 years ago

4 0

P-81
q-135
r-189
find out how many inches the rope is then divide by 15 total parts then multiply each ratio by that

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In a recent survey of 1002 people, 701 said that they voted in a recent presidential election. Voting records show that 61% of e

steposvetlana [31]

Answer:

The 95% confidence interval estimate of the proportion of people who say that they voted

(0.67122 , 0.72798)

Step-by-step explanation:

<u><em>Step(i)</em></u>:-

In a recent survey of 1002 people, 701 said that they voted in a recent presidential election.

Sample proportion

$p = \frac{x}{n} = \frac{701}{1002} = 0.6996$

<u><em>Step(ii)</em></u>

The 95% confidence interval estimate of the proportion of people who say that they voted

$(p^{-} - Z_{0.05} \sqrt{\frac{p(1-p)}{n} } , p^{-} + Z_{0.05} \sqrt{\frac{p(1-p)}{n} } )$

$(0.6996 - 1.96\sqrt{\frac{0.6996(1-0.6996)}{1002} } , 0.6996 + 1.96 \sqrt{\frac{0.6996(1-0.6996)}{1002} } )$

(0.6996 - 1.96 X 0.01448 , 0.6996 + 1.96 X 0.01448)

(0.6996 - 0.02838 , 0.6996 + 0.02838)

(0.67122 , 0.72798)

<u><em>Final answer</em></u>:-

The 95% confidence interval estimate of the proportion of people who say that they voted

(0.67122 , 0.72798)

7 0

2 years ago

Which equation illustrates the multiplicative identity property?

svlad2 [7]

I think that it’s the last

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3 years ago

HELPPP GIVING BRAINLIEST TO BEST ANSWER Lisa baked a chocolate cake using 150 grams of refined flour and 100 grams of sugar. She

saul85 [17]

Answer:

160g

Step-by-step explanation:

150 gr/100 =3/2

to find the sugar needed you inverse the fraction

240(2/3) =160

OR you can do cross multiplication

150--------------100

240---------------x

(240*100) / 150 x

24000/150 = 160

Or you can think that 150 i 100 plus half of 100 (100 + 50) = 150

and 240 is 160 plus half of 160 (160+80)=240

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3 years ago

Are sin and cosine graphs supposed to be curved (u-shape) or up and down (like a v-shape)?

hichkok12 [17]

The graphs are curved, not segments ending in a point.

http://www.wolframalpha.com/input/?i=plot+y+%3D+sin+x+for+-3.2+%3C+x+%3C+3.2+and+-1.1+%3C+y+%3C+1.2

3 0

2 years ago

Read 2 more answers

An electronics company makes communication devices for military contracts. The company just completed two contracts. The navy co

adelina 88 [10]

Answer:

Workers of army contract were more productive.

Step-by-step explanation:

To determine on which contract the workers were more productive compute the work done per hour by the workers for both contracts.

<u>Navy Contract</u>:

Number of devices = 2,300

Number of workers = 25

Number of weeks = 2 weeks

Number of hours per week = 40

The number of hours it took 25 workers to produce 2300 devices is =

$=25\times2\times40\\=2000\ hours$

Then number of devices produced in 1 hour is = $\frac{2300}{2000}= 1.15\ devices\ per\ hour$

<u>Army Contract</u>:

Number of devices = 5,500

Number of workers = 35

Number of weeks = 3 weeks

Number of hours per week = 40

The number of hours it took 35 workers to produce 5500 devices is = $=35\times3\times40\\=4200\ hours$

Then number of devices produced in 1 hour is = $\frac{5500}{4200}= 1.31\ devices\ per\ hour$

The workers for the army contract are more productive since they produce 1.31 devices per hour whereas the workers for navy contract produces 1.15 devices per hour.

4 0

2 years ago