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2 years ago

i five man take 45 hours to build a wall how long will it take 9 men working at the same pace to build this wall

Mathematics

1 answer:

Zarrin [17]2 years ago

4 0

Answer:

81 hours

Step-by-step explanation:

Let x be the time are needed

45：5 = x：9

5x = 45×9

5x = 405

x = 81

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Since the Boston marathon began in 1897, the finish time has been incrementally decreasing. The mean finish time to date is 231

morpeh [17]

Answer:

hello your question lacks the required options but i will provide a general answer to your question

answer : The mean value and the standard deviation would allow us use a Z-score

Step-by-step explanation:

mean value = 231 minutes

standard deviation ( std ) = 40 minutes

sample size = 40

The parameters that would be applicable while use Z-score are : The given mean value and the standard deviation

This is because the value of a z-score gives us an information on how far we are from the mean score i.e. number of standard deviations

+Zscore means that the score is above the average value

-Zscore means that the score is below the average value

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3 years ago

Help me<br><br><br><br> If x=1/2 and y=2/3 , find the value of xy+ (x+ y)

Dima020 [189]

Answer:

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Step-by-step explanation:

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2 years ago

Solve for the roots in the equation below. In your final answer, include each of the necessary steps and calculations.

Nostrana [21]

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$x^3=27e^{i\pi/2}$
$x=\left(27e^{i\pi/2}\right)^{1/3}$
$x=3e^{i(\pi/2+2\pi k)/3}$
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where $k\in\{0,1,2\}$ . This means you have

$x=3e^{i\pi/6}=\dfrac32(\sqrt3+i)$
$x=3e^{i5\pi/6}=\dfrac32(-\sqrt3+i)$
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as the solutions to the original equation.

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3 years ago

164,215 rounded to the nearest hundred thousand

ruslelena [56]

The answer is 200,000

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3 years ago

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Inessa05 [86]

A person could use a check or cash. With a check they don't have to worry about carrying cash but the check could bounce and cost them a fee. With cash they know they have enough but it doesn't build credit and is easy to misplace or misuse.

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3 years ago

i five man take 45 hours to build a wall how long will it take 9 men working at the same pace to build this wall​

i five man take 45 hours to build a wall how long will it take 9 men working at the same pace to build this wall