To estimate the distance to the Moon using the provided equation: \[ R = r \times \frac{\Delta\phi}{0.5x} \] Given: - \( r = 6,371 \) km (radius of the Earth) - \( \Delta\phi \) (difference in latitudes between Iznik and Alexandria) - \( x \) (fraction of the Sun's area still visible) We can plug these values into the equation to find \( R \). \[ R = 6,371 \times \frac{\Delta\phi}{0.5x} \] Then, we can calculate the accuracy using the provided formula: \[ \text{Accuracy} = \frac{|\text{calculated value} - \text{actual value}|}{\text{actual value}} \times 100 \] Let's perform the calculations