Since <math><mstyle displaystyle="true"><mn>19</mn></mstyle></math> is a whole number, it is a full degree. Since each minute is equal to <math><mstyle displaystyle="true"><mfrac><mrow><mn>1</mn></mrow><mrow><mn>60</mn></mrow></mfrac></mstyle></math> degree, multiply <math><mstyle displaystyle="true"><mn>19</mn></mstyle></math> by <math><mstyle displaystyle="true"><mfrac><mrow><mn>1</mn></mrow><mrow><mn>60</mn></mrow></mfrac></mstyle></math> . Since each second is equal to <math><mstyle displaystyle="true"><mfrac><mrow><mn>1</mn></mrow><mrow><mn>3600</mn></mrow></mfrac></mstyle></math> degree, multiply <math><mstyle displaystyle="true"><mn>0</mn></mstyle></math> by <math><mstyle displaystyle="true"><mfrac><mrow><mn>1</mn></mrow><mrow><mn>3600</mn></mrow></mfrac></mstyle></math> . Add them together.

Remove parentheses.

Simplify each term.

Combine <math><mstyle displaystyle="true"><mn>19</mn></mstyle></math> and <math><mstyle displaystyle="true"><mfrac><mrow><mn>1</mn></mrow><mrow><mn>60</mn></mrow></mfrac></mstyle></math> .

Multiply <math><mstyle displaystyle="true"><mn>0</mn></mstyle></math> by <math><mstyle displaystyle="true"><mfrac><mrow><mn>1</mn></mrow><mrow><mn>3600</mn></mrow></mfrac></mstyle></math> .

To write <math><mstyle displaystyle="true"><mn>19</mn></mstyle></math> as a fraction with a common denominator, multiply by <math><mstyle displaystyle="true"><mfrac><mrow><mn>60</mn></mrow><mrow><mn>60</mn></mrow></mfrac></mstyle></math> .

Combine <math><mstyle displaystyle="true"><mn>19</mn></mstyle></math> and <math><mstyle displaystyle="true"><mfrac><mrow><mn>60</mn></mrow><mrow><mn>60</mn></mrow></mfrac></mstyle></math> .

Combine the numerators over the common denominator.

Simplify the numerator.

Multiply <math><mstyle displaystyle="true"><mn>19</mn></mstyle></math> by <math><mstyle displaystyle="true"><mn>60</mn></mstyle></math> .

Add <math><mstyle displaystyle="true"><mn>1140</mn></mstyle></math> and <math><mstyle displaystyle="true"><mn>19</mn></mstyle></math> .

Add <math><mstyle displaystyle="true"><mfrac><mrow><mn>1159</mn></mrow><mrow><mn>60</mn></mrow></mfrac></mstyle></math> and <math><mstyle displaystyle="true"><mn>0</mn></mstyle></math> .

Convert the fraction to a decimal by dividing the numerator by the denominator.

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