Problem 2.1.The specified concrete strengthf′cfor a new building is 5000 psi. Calculate the requiredaveragef′crfor the concrete (a) if there are no prior test results for concrete with a compressive strengthwithin 1000 psi off′cmade with similar materials, ( b ) if 20 test results for concrete withf′c= 5500 psimade with similar materials produce a sample standard deviationssof 560 psi, and ( c ) if 30 tests withf′c= 4500 psi made with similar materials produce a sample standard deviationssof 540 psi.

answer:

i cant give me a pic

explanation:

answer:

walmart

explanation:

answer:

// here is code in C++.

#include <bits/stdc++.h>

using namespace std;

//main function

int main()

{

  // variable

 int n;

 cout<<"enter a number:";

 // read the input

 cin>>n;

 // find the square root of the absolute value

 float square_root=sqrt(abs(n));

 // print the square_root

 cout<<"square root of "<<n<<" is: "<<square_root<<endl;

  return 0;

}

Explanation:

Read a number from user and assign it to "n".Then find its absolute value with abs() function.Then calculate the square root of the absolute value with sqrt() function.Print the square root of the number.

Output:

enter a number:-17

square root of -17 is: 4.12311

                                                         This is easy

                                                     sinserly Natalie 7 grader (this is not that hard)