1. 3 = sqrt(9.0);
2. NaN = sqrt(-9.0);
3. 32 = pow(2.0, 5)
4. 0.25 = pow(2.0, -2);
5. 6 = ciel(5.1);
6. 6 = ciel(5.9);
7. 5 = floor(5.1);
8. 5 = floor(5.9);
9. 4 = sqrt( pow(abs(-2), 4));