To determine the minimum number of hours \( h \) that Hanna must work to earn at least $300 in one week, we can set up the following inequality.
Hanna's total earnings for the week can be expressed as:
\[ \text{Total earnings} = \text{Base salary} + \text{Hourly wage} \times \text{Number of hours worked} \]
Substituting in her base salary of $75 and her hourly wage of $9, we have:
\[ \text{Total earnings} = 75 + 9h \]
We want this total to be at least $300, so we set up the inequality:
\[ 75 + 9h \geq 300 \]
Now, we can solve for \( h \):
- Subtract 75 from both sides:
\[ 9h \geq 300 - 75 \] \[ 9h \geq 225 \]
- Divide both sides by 9:
\[ h \geq \frac{225}{9} \] \[ h \geq 25 \]
Thus, the inequality that can be used to determine \( h \), the minimum number of hours she must work to earn at least $300 during one week, is:
\[ h \geq 25 \]