1. **Problem 1: Find the area of a trapezoid** with height $7.5$ ft and bases $7.5$ ft and $15$ ft. 2. The formula for the area of a trapezoid is: $$\text{Area} = \frac{1}{2} \times (\text{base}_1 + \text{base}_2) \times \text{height}$$ 3. Substitute the given values: $$\text{Area} = \frac{1}{2} \times (7.5 + 15) \times 7.5$$ 4. Simplify inside the parentheses: $$7.5 + 15 = 22.5$$ 5. Calculate the area: $$\text{Area} = \frac{1}{2} \times 22.5 \times 7.5$$ 6. Multiply $22.5$ and $7.5$: $$22.5 \times 7.5 = 168.75$$ 7. Now multiply by $\frac{1}{2}$: $$\text{Area} = \frac{1}{2} \times 168.75 = 84.375$$ 8. **Answer for Problem 1:** The area of the trapezoid is $84.375$ ft$^2$. 9. **Problem 2: Find the area of a semi-circular field** using $\pi = 3.14$. 10. The formula for the area of a circle is: $$\text{Area} = \pi r^2$$ 11. Since the field is a semi-circle, its area is half the area of a full circle: $$\text{Area}_{semi} = \frac{1}{2} \pi r^2$$ 12. The radius $r$ is not given explicitly, but assuming the semi-circle's diameter is the same as the base of the trapezoid (15 ft) or from the image description, if radius is known, substitute it here. Since no radius is given, we cannot calculate a numeric answer. 13. If radius $r$ is known, plug in the value and calculate: $$\text{Area}_{semi} = \frac{1}{2} \times 3.14 \times r^2$$ 14. Round the result to the nearest square foot. **Note:** Please provide the radius or diameter of the semi-circle to calculate the exact area.