1. **State the problem:** We need to find the sum of the measures of angle 3 and angle 4 in a right triangle where the two legs adjacent to the right angle are both 3.4 units long. 2. **Recall the property of a right triangle:** The sum of the three interior angles in any triangle is always 180 degrees. 3. **Identify the angles:** Since the triangle has a right angle (90 degrees), the other two angles (angle 3 and angle 4) must sum to the remaining degrees. 4. **Calculate the sum:** $$\text{angle 3} + \text{angle 4} = 180^\circ - 90^\circ = 90^\circ$$ 5. **Conclusion:** The sum of angle 3 and angle 4 is 90 degrees. --- 6. **Second problem:** Express $\frac{12}{17}$ as a decimal rounded to four decimal places. 7. **Perform the division:** $$\frac{12}{17} \approx 0.7058823529$$ 8. **Round to four decimal places:** $$0.7059$$ 9. **Final answer:** $0.7059$