1. **State the problem:** Althea wants to save a total of 384 by saving a fixed amount each week. For Plan B, she saves 30 each week. We need to find how many weeks it will take her to reach 384 using Plan B. 2. **Formula used:** The number of weeks needed is calculated by dividing the total savings goal by the amount saved each week: $$\text{Weeks} = \frac{\text{Total Savings}}{\text{Amount Saved Each Week}}$$ 3. **Apply the formula for Plan B:** $$\text{Weeks}_B = \frac{384}{30}$$ 4. **Calculate:** $$\text{Weeks}_B = 12.8$$ 5. **Interpretation:** Since the number of weeks must be a whole number (you can't save for a fraction of a week), Althea will need 13 weeks to reach or exceed her savings goal with Plan B. 6. **Answer:** The missing number in the table for Plan B is **13** weeks. This means Althea will need 13 weeks saving 30 each week to reach at least 384.