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3 years ago

Urgent please doooooo

Mathematics

2 answers:

Molodets [167]3 years ago

6 0

I think the answer is ur dad

Jlenok [28]3 years ago

4 0

Answer:

A=pi(r)^2 i don't have the pi symbol so ill j say pi

A=pi(18)^2

A=324pi

if they want u to leave with pi that is the answer if not then its

A=1017.9

C= 2pi(r)

C=2pi(18)

C=36pi

same thing here if they want u to leave it with pi that's the answer if not then

C=113.1

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sixteen men working 9 hrs a day can complete a pice of work in 14 days .How many more men working 7 hrs a day would complete the

nordsb [41]

Answer:

<em>8 more men are needed to complete the job</em>

Step-by-step explanation:

<u>Proportions</u>

This problem can be solved by step-by-step reasoning applying proportions:

16 men working 9 hrs a day complete the job in 14 days
16 men working 1 hr a day complete the job in 14*9 days

The above statement stands because the fewer hours of work, the more time the job needs to be completed. Let's continue.

1 man working 1 hr a day complete the job in 14*9*16 days

The same reasoning applies here, fewer men=more days.

Now for the second condition. Increase the hours/day:

1 man working 7 hrs a day complete the job in 14*9*16/7 days

More hours/day=less days to complete the job

x men working 7 hrs a day complete the job in 14*9*16/(7*x) days

We know this last time is 12 days, thus:

$\displaystyle 12=\frac{14*9*16}{7*x}$

Solving for x:

$\displaystyle x=\frac{14*9*16}{7*12}=\frac{2016}{84}=24$

24 men are needed now, this is an increase of 24-16=8 more men

8 more men are needed to complete the job

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3 years ago

If you vertically compress the absolute value parentsl function, f(x)=|x| by a factor of 4 what is the equation if thr new funct

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4 years ago

Mimi, age 65, goes in for cholesterol testing. She has total blood cholesterol of 100mg/dL. The mean blood cholesterol level is

AveGali [126]

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3 years ago

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notka56 [123]

Answer:

50%, 68.26%, 95.54%

Step-by-step explanation:

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3 years ago

The class scores of a history test have a normal distribution with a mean Mu = 79 and a standard deviation Sigma = 7. If Opal’s

storchak [24]

The value of z score for the history class test of Opal’s test score is negative one (-1).

<h3>What is normally distributed data?</h3>

Normally distributed data is the distribution of probability which is symmetric about the mean.

The mean of the data is the average value of the given data. The standard deviation of the data is the half of the difference of the highest value and mean of the data set.

The z score for the normal distributed data can be given as,

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The mean value of the scores of history class is,

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The standard deviation value of the scores of history class is,

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Here, the test score of the Opal’s is 72. Thus the z score for her test score can be given as,

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Hence, the value of z score for the history class test of Opal’s test score is negative one (-1).

Learn more about the normally distributed data here;

brainly.com/question/6587992

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3 years ago