To find out how much money Tina will spend to fill up her car, we first need to determine how much gasoline she needs.
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Calculate how much gasoline she needs:
- Total capacity of the SUV: 18.5 gallons
- Amount of gasoline currently in the SUV: 4.5 gallons
\[ \text{Gasoline needed} = \text{Total capacity} - \text{Current amount} = 18.5 \text{ gallons} - 4.5 \text{ gallons} = 14 \text{ gallons} \]
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Calculate the cost of the gasoline needed:
- Cost per gallon: $2.75
- Amount of gasoline needed: 14 gallons
\[ \text{Total cost} = \text{Gasoline needed} \times \text{Cost per gallon} = 14 \text{ gallons} \times 2.75 \text{ dollars/gallon} = 38.50 \text{ dollars} \]
Therefore, Tina will spend $38.50 to fill up her car.