An unknown fiber sample is found at a crime scene. forensic scientists measure its index of refraction and obtain a value of 1.48. a suspect's jacket was made of dacron polyester, his jeans were made of cotton, his shirt was made of rayon, and his tie was made of acetate. which piece of clothing may match the fiber at the crime scene?
question 12 options:

tie

shirt

jeans

jacket

You have two photos of a person walking. one shows the person at the corner of third and main streets, the other shows the person at the corner of tenth and main streets. there are lampposts at every corner in this town, and the first picture shows it to be 10: 32: 00 exactly. the second picture shows it to be 10: 49: 30. you know three facts: (1) all of the clocks are synchronized; (2) there are exactly 12 equal-sized blocks per kilometer in this town; and (3) the streets that cross main in this area are numbered consecutively, with no interruptions. what is the person’s average speed in kilometers per hour?