Thread: Please Help

I have been presented with the following practice question on a c++ course I'm taking. I have no access to the teacher so I do not know who to turn to

The exercise says:

2.7: Ocean Levels

Assuming the ocean’s level is currently rising at about 1.5 millimeters per year, write a program that displays

The number of millimeters higher than the current level that the ocean’s level will be in 5 years,
The number of millimeters higher than the current level that the ocean’s level will be in 7 years,
The number of millimeters higher than the current level that the ocean’s level will be in 10 years,

Output labels: Each value should be on a line by itself, preceded by the a label of the form:
In X years the ocean's level be higher by Y millimeters.
where X is the number of years (5, 7 or 10) and Y is the value you calculate.


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When I submit my code to the computer course software it gives me a logical error. The program runs fine when I execute but obviously its not the right answer. Is there something I'm missing as far as the math formula goes? Please help
Here is the code I have so far:

Code:

#include <iostream>

using namespace std;

int main()
{
    double fiveYears, sevenYears, tenYears;
    
    fiveYears = 5 * 1.5; 
    sevenYears = 7 * 1.5; 
    tenYears = 10 * 1.5; 
    

    cout << "In 5 years the ocean's level be higher by " << fiveYears << " millimeters." << endl;
    cout << "In 7 years the ocean's level be higher by " << sevenYears << " millimeters." << endl;
    cout << "In 10 years the ocean's level be higher by " << tenYears << " millimeters." << endl;
    
    system("PAUSE");
    return 0;
}