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gulaghasi [49]
3 years ago
13

TJ. W

Mathematics
1 answer:
tigry1 [53]3 years ago
5 0

Answer:

It is easier to calculate stresses in beam and an exact measure of strength of steel. • If two beams are made of same material and comparing the “section modulus” ... section modulus will be tougher and more capable to withstand larger loads. ... earth pressures and all forces for the anchored sheet pile wall in figure 3 below.

Step-by-step explanation:

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Find the sale price of a $90 item after a 50% discount.
Gekata [30.6K]

Answer:

The sale price of a $90 item after a 50% discount is $45.

3 0
3 years ago
In a random sample of 1,000 exams, the average score was 500 points with a standard deviation of 80 points.
bagirrra123 [75]
90% c.I. is given by







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3 years ago
Diane's Tree Trimming Service has trimmed hundreds of trees in the Greater Denver area. The time it takes to trim a tree is norm
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
Is a exponent determined by the amount of zeros in the number?
Alex777 [14]
Yup, the amount of 0's is the exponent. for example 1000= 10^3, hope this helped :)
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Laurel wants to build a fence around her square garden. Each side measures 50 feet. She also wants to fence in 3 square rose bed
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Laurel needs 210.5 feet of fence
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