Which page format would you likely use for a photograph of a standing tree? AND why would you use that format?

The mathematical constant Pi is an irrational number with value approximately 3.1415928... The precise value of this constant ca

tatiyna

Answer:

I am writing a Python program:

def approxPIsquared(error):

previous = 8

new_sum =0

num = 3

while (True):

new_sum = (previous + (8 / (num ** 2)))

if (new_sum - previous <= error):

return new_sum

previous = new_sum

num+=2

print(approxPIsquared(0.0001))

Explanation:

I will explain the above function line by line.

def approxPIsquared(error):

This is the function definition of approxPlsSquared() method that takes error as its parameter and approximates constant Pi to within error.

previous = 8 new_sum =0 num = 3

These are variables. According to this formula:

Pi^2 = 8+8/3^2+8/5^2+8/7^2+8/9^2+...

Value of previous is set to 8 as the first value in the above formula is 8. previous holds the value of the previous sum when the sum is taken term by term. Value of new_sum is initialized to 0 because this variable holds the new value of the sum term by term. num is set to 3 to set the number in the denominator. If you see the 2nd term in above formula 8/3^2, here num = 3. At every iteration this value is incremented by 2 to add 2 to the denominator number just as the above formula has 5, 7 and 9 in denominator.

while (True): This while loop keeps repeating itself and calculates the sum of the series term by term, until the difference between the value of new_sum and the previous is less than error. (error value is specified as input).

new_sum = (previous + (8 / (num ** 2))) This statement represents the above given formula. The result of the sum is stored in new_sum at every iteration. Here ** represents num to the power 2 or you can say square of value of num.

if (new_sum - previous <= error): This if condition checks if the difference between the new and previous sum is less than error. If this condition evaluates to true then the value of new_sum is returned. Otherwise continue computing the, sum term by term.

return new_sum returns the value of new_sum when above IF condition evaluates to true

previous = new_sum This statement sets the computed value of new_sum to the previous.

For example if the value of error is 0.0001 and previous= 8 and new_sum contains the sum of a new term i.e. the sum of 8+8/3^2 = 8.88888... Then IF condition checks if the

new_sum-previous <= error

8.888888 - 8 = 0.8888888

This statement does not evaluate to true because 0.8888888... is not less than or equal to 0.0001

So return new_sum statement will not execute.

previous = new_sum statement executes and now value of precious becomes 8.888888...

Next num+=2 statement executes which adds 2 to the value of num. The value of num was 3 and now it becomes 3+2 = 5.

After this while loop execute again computing the sum of next term using new_sum = (previous + (8 / (num ** 2)))

new_sum = 8.888888.. + (8/(5**2)))

This process goes on until the difference between the new_sum and the previous is less than error.

screenshot of the program and its output is attached.

6 0

3 years ago

At the frequency of 2.4 GHz what is the free-space path loss in dB.

chubhunter [2.5K]

Answer:

The FSBL is 100.05 dB

Solution:

As per the question:

Frequency, f = 2.4 GHz = $2.4\times 10^{9}$

Now, we know that to calculate FSBL, i.e., Free Space Path Loss in dB, we use:

$FSBL(in dB) = 10log_{10}(\frac{4\pifd}{c})^{2}$

where

d = 1 km = 1000

c = $3\times 10^{8} m/s$

$FSBL(in dB) = 20log_{10}\frac{4\pifd}{c} = 20log_{10}(fd) + 20log_{10}(\frac{4\pi}{c})$

$FSBL(in dB) = 20log_{10}(f) + 20log_{10}(d) + 20log_{10}(\frac{4\pi}{c})$

$FSBL(in dB) = 20log_{10}(2.4\times 10^{9}) + 20log_{10}(10^{3}) + 20log_{10}(\frac{4\pi}{3\times 10^{8}})$

$FSBL(in dB) = 20\times 9.3802 + 20\times 3 - 147.55 = 100.05 dB$

6 0

3 years ago

Your organization's network has multiple layers of security devices. When you attempt to connect to a service on the Internet. H

Sindrei [870]

Answer:

The host-based firewall settings are blocking the service

Explanation:

Host-based firewall settings can be configured on each workstation. The firewall can be provided by the operating system itself, or it can be a standalone software package that provides security features and functionality for the device's network connection. If this firewall contains incorrect settings, legitimate services can be blocked, and if so, a message will usually notify the user of such a breach. In these cases, the firewall settings need to be adjusted to make the desired service work.

7 0

3 years ago

It is a single strand of metal capable of transmitting power or data from one area to<br> another

Lera25 [3.4K]

Answer: A wire

Explanation:

8 0

3 years ago

A palindrome number is a number that remains the same when its digits are reversed. Like 16461, for example, is a palindrome num

xxMikexx [17]

Answer:

Code is given below and output is attached as an image.

Explanation:

#include <iostream>

#include <fstream>

using namespace std;

bool isPalindrome(int n)

{

// Find reverse of n

int rev = 0;

for (int i = n; i > 0; i /= 10)

rev = rev * 10 + i % 10;

// If n and rev are same,then n is a palindrome

return (n == rev);

}

int main()

{

int min = 1; // Lower Bound

int max = 200; // Upper Bound

ofstream myfile;

myfile.open("palindrome.txt");

for (int i = min + 1; i < max; i++)

if (isPalindrome(i))

myfile << i << endl;

myfile.close();

return 0;

}

5 0

3 years ago