20-21 I need help with these test answers please make the writing clear

Question 20 [3 points) The sound of a starting pistol can be heard easily from a distance of 8001} m but the smoke can be seen much sooner than the sound is perceived. ia'ir'h'lr is the smoke seen before the sound is heard? What is the speed of sound if the air temperature is 15 \"C? Paragraph v B I U V A! g V II\" '7. or I: +