To determine the total number of ways Ms. Crosby can hire one teacher for each subject (biology, chemistry, and physics), we can multiply the number of options available for each subject.
- Biology teachers: There are 10 options.
- Chemistry teachers: There are 6 options.
- Physics teachers: There are 5 options.
The total number of ways to hire the teachers is given by the product of the number of options for each subject:
\[ \text{Total ways} = (\text{Biology options}) \times (\text{Chemistry options}) \times (\text{Physics options}) \]
Substituting the numbers we have:
\[ \text{Total ways} = 10 \times 6 \times 5 \]
Calculating this step by step:
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Calculate \(10 \times 6\): \[ 10 \times 6 = 60 \]
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Now take the result and multiply by 5: \[ 60 \times 5 = 300 \]
Therefore, the total number of different ways Ms. Crosby can hire the staff is
\[ \boxed{300} \]