Assume the following variable definition appears in a program: double number = 12.0; Write a cout statement that uses the setprecision manipulator and the showpoint manipulator to display the number variable with 8 significant digits, padded with trailing zeroes. (Assume that the program includes the necessary header file for the manipulators.)

The answer with explanation and output result is provided below.

Explanation:

setprecision(n) manipulator controls the number of places after the decimal point. setprecision(8) will display 8 significant digits, padded with trailing zeroes.

fixed manipulator sets the output in a fixed decimal format.

showpoint manipulator makes sure the display of a decimal point.

setprecision(n) and fixed manipulator should be used together otherwise it might not show the trailing zeroes.

Code:

#include <iostream>

#include <iomanip>

using namespace std;

int main()

{

  double number=12.0;

  cout<<fixed<<showpoint<<setprecision(8)<<number<<endl;

   return 0;

}

Output:

12.00000000

only #2 represents an object at rest on a table.

in #1, there is no normal force due to the table; the object is accelerating downward.

in #3, the vertical forces are not balanced; the object is accelerating downward.

in #4, neither the vertical nor the horizontal forces are balanced. the object is accelerating upwards and to the right.