To calculate Nadia's commission for last week, you can use the following formula:
\[ \text{Commission} = \text{Sales} \times \text{Commission Rate} \]
In this case, Nadia sold $7,500 worth of stocks and earns a 12% commission.
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Convert the percentage into decimal form: \(12% = 0.12\)
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Now calculate the commission: \[ \text{Commission} = 7,500 \times 0.12 = 900 \]
So, last week, Nadia made $900 in commission.
Part 1: Last week, she made $900 in commission.