There are 2 female teachers and 19 male teachers at Rosanne's high school. What is the ratio of the number of male teachers to the number of female teachers?

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To find the ratio of the number of male teachers to the number of female teachers at Rosanne's high school, we can use the following formula for ratios:

\[ \text{Ratio} = \frac{\text{Number of Male Teachers}}{\text{Number of Female Teachers}} \]

In this case:

  • Number of Male Teachers = 19
  • Number of Female Teachers = 2

Now, we can substitute these values into the formula:

\[ \text{Ratio} = \frac{19}{2} \]

This ratio can also be expressed in the form of "X:Y", where X is the number of male teachers and Y is the number of female teachers:

\[ \text{Ratio} = 19:2 \]

So, the ratio of the number of male teachers to the number of female teachers is 19:2.