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2 years ago

1.21 LAB: Divide by x

Computers and Technology

2 answers:

dangina [55]2 years ago

3 0

Answer:

Explanation:

The following code is written in Python. It is a function called divide_by_x and takes the user inputs as described. It then raises x to the third power and divides user_num by that number. This gives the same result as user_num divided by x three times. The answer is saved in the variable answer which is then returned to the user.

def divide_by_x(user_num, x):

answer = user_num / (x**3)

return answer

Feliz [49]2 years ago

3 0

Answer:

Explanation:

So I am pretty new to scripting so what I have is inelegant but it worked.

user_num = int(input())

x = int(input())

t1 = user_num//x

print(user_num//x, end = ' ')

t2 = t1//x

print(t1//x, end = ' ')

t3 = t2//x

print(t2//x, end = '\n')

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Write a python 3 function named words_in_both that takes two strings as parameters and returns a set of only those words that ap

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Answer:

def words_in_both(a, b):

a1 = set(a.lower().split())

b1 = set(b.lower().split())

return a1.intersection(b1)

common_words = words_in_both("She is a jack of all trades", 'Jack was tallest of all')

print(common_words)

Explanation:

Output:

{'all', 'of', 'jack'}

5 0

2 years ago

Read 2 more answers

Find a 95% confidence interval for the mean failure pressure for this type of roof panel.The article "Wind-Uplift Capacity of Re

aliya0001 [1]

Answer:

The 95% confidence interval would be given by (2.351;3.525)

Explanation:

1) Previous concepts

A confidence interval is "a range of values that’s likely to include a population value with a certain degree of confidence. It is often expressed a % whereby a population means lies between an upper and lower interval".

The margin of error is the range of values below and above the sample statistic in a confidence interval.

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".

$\bar X$ represent the sample mean

$\mu$ population mean (variable of interest)

s represent the sample standard deviation

n represent the sample size

2) Confidence interval

The confidence interval for the mean is given by the following formula:

$\bar X \pm t_{\alpha/2}\frac{s}{\sqrt{n}}$ (1)

In order to calculate the mean and the sample deviation we can use the following formulas:

$\bar X= \sum_{i=1}^n \frac{x_i}{n}$ (2)

$s=\sqrt{\frac{\sum_{i=1}^n (x_i-\bar X)}{n-1}}$ (3)

The mean calculated for this case is $\bar X=2.938$

The sample deviation calculated $s=0.472$

In order to calculate the critical value $t_{\alpha/2}$ we need to find first the degrees of freedom, given by:

$df=n-1=5-1=4$

Since the Confidence is 0.95 or 95%, the value of $\alpha=0.05$ and $\alpha/2 =0.025$ , and we can use excel, a calculator or a table to find the critical value. The excel command would be: "=-T.INV(0.025,4)".And we see that $t_{\alpha/2}=2.78$

Now we have everything in order to replace into formula (1):

$2.938-2.78\frac{0.472}{\sqrt{5}}=2.351$

$2.938+2.78\frac{0.472}{\sqrt{5}}=3.525$

So on this case the 95% confidence interval would be given by (2.351;3.525)

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2 years ago

A Color class has three int color component instance variables: red, green, and blue. Write a toString method for this class. It

ELEN [110]

Answer:

public String toString() {

return "#(" + red + "," + green + "," + blue + ")";

}

Explanation:

The code:

public String toString() {

return "#(" + red + "," + green + "," + blue + ")";

}

Is a tostring java code, and it is so easy to write one, as compare to other programming languages

Writing a tostring method returns a strinb representation of an object in Java. Normally, the toString method returns the name of the object’s class plus its hash code.

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Tostring method can be override. The default implementation of toString isn’t very useful in most situations. So, one can just override it.

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2 years ago

Although the optical discs are all 5 ¼”, a CD drive can not read a DVD disc, and a DVD drive can not read a Blu-ray disc. Why no

otez555 [7]

Answer:

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The DVD or the digital video dos is based on the optical data storage which is almost the same as the CD. The analog data is transformed into the digital data, and this is encoded on the disc starting from the inside edge, and towards out. This digital information is being encoded into the surface as pits, and the surface acts as the recording layer. A DVD can hold data up to 4.77 to 8 GB.

Since DVD size is bigger than CD, A DVD drive can read CD, but the CD drive cannot read the DVD,

And unlike the above two, which make use of the red laser for reading and writing, the blu ray makes use of the blue laser. Also, it has the smaller pits, tiny beam as well as small track that together make it possible to store around 25 GB of data in one single blue ray disc. And this is five times more than the size of a DVD.

The Blu ray Discs are good for playing the CD as well as DVD. However, the opposite is not possible due to the size.

Explanation:

Please check the answer section.

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2 years ago

write a program to read in three nonnegative integers from the keyboard. Display the integers in increasing order.

snow_tiger [21]

Answer:

Find the attached ReadAndOrder() function

Explanation:

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2 years ago