Final answer:
The angle of impact for the bloodstain can be calculated using the formula Impact angle = sin⁻¹ (width/length), which yields an approximate value of 6°, making option 4 the correct choice.
Step-by-step explanation:
To calculate the angle of impact for a bloodstain, the formula given is Impact angle = sin⁻¹ (width/length). In this problem, the width of the bloodstain is 2.6 mm and the length is 23.2 mm. Using the formula:
Impact angle = sin⁻¹ (2.6 mm / 23.2 mm) = sin⁻¹ (0.1121) ≈ 6.46°
After calculating, we round the result to the nearest whole number, resulting in an impact angle of approximately 6°. Therefore, the correct answer is option 4) 6°.