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Troyanec [42]
3 years ago
10

I NEED HELP WITH NUMBER 4​

Mathematics
1 answer:
weeeeeb [17]3 years ago
8 0

Answer:

4.5 inches

Step-by-step explanation:

To find the height in inches of the model, you need to change the ration into a fraction:

\frac{1}{50}

Then try to figure out the value of the denominator in terms of the ratio:

\frac{1}{50} =\frac{x}{725}

In this equation we need to figure out how much the denominator of the fraction is changing by, by dividing 725 by 50. Then, multiply that by one:

4.5

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kkurt [141]

Answer:P(28.5And we can find this probability with this difference:

P(-0.7

And in order to find these probabilities we use tables for the normal standard distribution, excel or a calculator.

P(-0.7

So then the best answer would be 21.82 %

Step-by-step explanation:

Previous concepts

Normal distribution, is a "probability distribution that is symmetric about the mean, showing that data near the mean are more frequent in occurrence than data far from the mean".

The Z-score is "a numerical measurement used in statistics of a value's relationship to the mean (average) of a group of values, measured in terms of standard deviations from the mean".  

Solution to the problem

Let X the random variable that represent the time it takes to trim a tree of a population, and for this case we know the distribution for X is given by:

X \sim N(32,5)  

Where \mu=32 and \sigma=5

We are interested on this probability

P(28.5

And the best way to solve this problem is using the normal standard distribution and the z score given by:

z=\frac{x-\mu}{\sigma}

If we apply this formula to our probability we got this:P(28.5And we can find this probability with this difference:

P(-0.7

And in order to find these probabilities we use tables for the normal standard distribution, excel or a calculator.

P(-0.7

 So then the best answer would be 21.82 %

8 0
3 years ago
A person drove from 8 am Tuesday to 5 pm Wednesday. Total drive 396 miles. He have lunch for 30 minutes on Tuesday and sleep ove
777dan777 [17]

Answer: 18mph

Step-by-step explanation:

Given data

total distance driven = 396 miles

time driven = 8 am Tuesday to 5 pm Wednesday

total time driven in hours = 33 hours

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= 60 min

= 1 hour

sleep time = 7 pm Tuesday to  5 am Wednesday

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solution:

To find the average speed,

we are given total time driven = 33hrs.

lunch + rest time = 10hrs + 1hr

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total time travelled =drive time - rest + lunch time

= 33 - 11

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average speed = 18 mph

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The absolute value of 14 is 14.l
Hope it helps :)
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forsale [732]

Answer: 132.27

Step-by-step explanation:

Multiply 8 × 9 × 27 to get the value of x

= 1944

To get 3 square root of 1944, find the square root of 1944 = 44.09

3 square root of 1944 = 3 x 44.09 = 132.27

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Answer:y=5x−3

Step-by-step explanation:

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3 years ago
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